Some will dissolve but only a small amount.These are some of the basic rules for solubility ( https://youtu.be/zffVKN6tm7k):Salts of:- Group I elements (Li+, Na+, K+, Cs+, Rb+) are- NH4+ (Ammonium ion) are soluble.- the nitrate ion (NO3-) are generally soluble.- of Cl-, Br-, and I- are soluble. The answer is that it is slightly soluble in water. Preparing for the AP Chemistry test? BeF2 is very soluble in water due to the high hydration energy of the small Be+2ion. The sulphates of calcium, strontium and barium are insoluble, and the carbonates, oxalates, chromates and fluorides of the whole group are insoluble. However, the process of solubility is unique, and the rate at which it dissolves is not factored into the equation. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. It is quite hard, very sensitive to thermal shock and fractures quite easily. Ksp = 2.2 x 10-5 Ag2SO4, Ksp - 1.5 x 10-5 Zn(103)2, Ksp = 3.9 x 10-6 This problem has been solved! Group II carbonates (CaCO3, SrCO3, and BaCO3) are insoluble, as are FeCO3 and PbCO3. rev2023.3.3.43278. Its simply the equilibrium constant (Keq) for an ionic substance dissolving in water. With most compounds, on descending the group, the hydration energy decreases more rapidly than the lattice energy: hence the compounds become less soluble as the metal gets larger. Most sulfate salts are soluble. Step-by-step solution What ACT target score should you be aiming for? The multiplication of ions of a specific compound when particularly dissolved in an aqueous solution becomes equivalent to solubility product. This compound is soluble. hbspt.cta.load(360031, '4efd5fbd-40d7-4b12-8674-6c4f312edd05', {}); Have any questions about this article or other topics? While many compounds are partially or mostly insoluble, there is no substance that is completely insoluble in water, meaning that it can't dissolve at all. Calculate the molar solubility of barium fluoride, BaF 2, in water at 25C. Answer = C2H6O is Polar What is polarand non-polar? 6 What makes BaF2 soluble or insoluble in water? Salts containing Group I elements (Li+, Na+, K+, Cs+, Rb+) are soluble . Todd Helmenstine is a science writer and illustrator who has taught physics and math at the college level. hbspt.cta._relativeUrls=true;hbspt.cta.load(360031, '21006efe-96ea-47ea-9553-204221f7f333', {"useNewLoader":"true","region":"na1"}); Carrie holds a Bachelors in Writing, Literature, and Publishing from Emerson College, and is currently pursuing an MFA. Get the latest articles and test prep tips! The dissociation reaction of AgCl in water isAgCl (s) Ag+ (aq) + Cl- (aq)For this reaction, each mole of AgCl that dissolves produces 1 mole of both Ag+ and Cl-. It's just F. Sal gets it wrong in a few videos and puts "Fl", http://facebookid.khanacademy.org/1011175906. Calculate the concentration of fluoride ion in the solution after addition of the powdered NaF. Hey there! The solubility is equal to the concentration of the Ba ions in solution.solubility = [Ba+] = 7.94 x 10-3 M[F-] = 2 [Ba+]Ksp = [Ba+][F-]2Ksp = ([Ba+])(2 [Ba+])2Ksp = 4[Ba+]3Ksp = 4(7.94 x 10-3 M)3Ksp = 4(5 x 10-7)Ksp = 2 x 10-6. Question: Is BaF2 ( Barium fluoride ) Soluble or Insoluble in water ? Rule 4 says that silvers (Ag) are frequently insoluble, but rule 3 says that chlorates (Cl) are soluble. Question = Is C2H6Opolar or nonpolar ? Exceptions: Ba2+, Ca2+, Pb2+, Ag+, Sr2+- most hydroxide salts are only slightly soluble. ThoughtCo, Jan. 29, 2020, thoughtco.com/solubility-product-from-solubility-problem-609530. A Comprehensive Guide. Barium fluoride | BaF2 | CID 62670 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. Luckily, solubility follows a list of rules that helps us determine how soluble a substance is, like how likely that salt is to dissolve into that water (sneak peek- its very likely). 3. A saturated solution of BaF2 at 25C is prepared by equilibrating solid BaF2 with water. For example, sugar is a polar solute, and absorbs very well in water. 2.4K views 1 year ago In this video we will describe the equation BaF2 + H2O and write what happens when BaF2 is dissolved in water. Calculate the value of Ksp . Viscosity: Dynamic: N/A Powdered NaF is then dissolved in the solution until the solubility of BaF2 is 1.0% of that in H2O alone. . Check out our top-rated graduate blogs here: PrepScholar 2013-2018. So, the minimum solubility is in the middle of the series. It is a colorless solid that occurs in nature as the rare mineral frankdicksonite. Salts containing nitrate ion (NO3-) are generally soluble. Very subject to thermal shock 2. F. One of the first science experiments I remember was adding salt to a cup of water and waiting eagerly for it to dissolve. Calculate the mass of AgCl that can dissolve in 100 mL of 0.150 M NaCl solution. Looking for more chemistry help? The solubility-product constant for BaF2 is 1.7 x 10^-6 at 25 C. Polarity is a major factor in a substance's solubility. Done on a Dell Dimension laptop computer with a Wacom digital tablet (Bamboo). The solubility would then equal the concentration of either the Ag or Cl ions.solubility = [Ag+] = [Cl-]1.26 x 10-5 M = [Ag+] = [Cl-]Ksp = [Ag+][Cl-]Ksp = (1.26 x 10-5)(1.26 x 10-5)Ksp = 1.6 x 10-10, The dissociation reaction of BaF2 in water isBaF2 (s) Ba+ (aq) + 2 F- (aq)This reaction shows that for every mole of BaF2 that dissolves, 1 mole of Ba+ and 2 moles of F- are formed. Shreya G answered on July 16, 2021. Is CaF2 (Calcium fluoride) soluble or insoluble in water (CaF2 + H2O)? Free samples program. Divide the mass of the compound by the mass of the solvent and then multiply by 100 g to calculate the solubility in g/100g . 1 Approved Answer. Thus, s=21[F ]. It is less resistant to water than calcium fluoride, but it is the most resistant of all the optical fluorides to high-energy radiation, though its far ultraviolet transmittance is lower than that of the other fluorides. Above ca. The other fluorides MF2 are are all almost insoluble. Question 19 Which of the following substances has the greatest solubility in water? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Thanks for contributing an answer to Chemistry Stack Exchange! Rate should not be factored into the solubility of a substance.This can often be confusing when first learning about solubility, since in a visual example, watching something dissolve quickly can feel like an affirmation of its ability to dissolve. It responds also to alpha and beta particles, but, unlike most scintillators, it does not emit ultraviolet light. Prolonged exposure to moisture degrades transmission in the vacuum UV range. The answer is that it is slightly soluble in water.. Compare the solubility in this case with that of BaF 2 in pure water. 81 views Jul 19, 2022 Is BaF2 (Barium fluoride) soluble or insoluble in. Everything you need for your studies in one place. It is a colorless solid that occurs in nature as the rare mineral frankdicksonite. Knowing and following the solubility rules is the best way to predict the outcome of any given solution. If we add 0.100M solution AgNO3 drop by drop, will AgCI or AgCrO4 precipitate first? It is a colorless solid that occurs in nature as the rare mineral frankdicksonite. Why is there a voltage on my HDMI and coaxial cables? Helmenstine, Todd. As more acid is added to a suspension of Mg(OH)2, the equilibrium shown in Equation 16.4. Barium fluoride is also a common, very fast (one of the fastest) scintillators for the detection of X-rays, gamma rays or other high energy particles. Use Coupon: CART20 and get 20% off on all online Study Material, Complete Your Registration (Step 2 of 2 ), Sit and relax as our customer representative will contact you within 1 business day. Thinking about the salt in water experiment now, its clear that the salt- also known as NaCl or sodium chloride, would be highly soluble according to our solubility rules. AgI,BaF2 , and AgBr are all sparingly soluble salts. What is the molar solubility of barium fluoride ( BaF2 ) in water? Solubility Product From Solubility Example Problem. Such a solution is called saturated. How can we prove that the supernatural or paranormal doesn't exist? If you continue to use this site we will assume that you are happy with it. Determine whetherCaF2s (role="math" localid="1661513203101" Ksp=3.910-11) tends to precipitate from this mixture. Thus, Fe(OH)3, Al(OH)3, Co(OH)2 are not soluble. Hence, in pure water the molar solubility is 7.5110-3mol/L. Enter a Melbet promo code and get a generous bonus, An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. For help with net ionic equations see https://youtu.be/PXRH_IrN11Y .If you need to know how to balance chemical reactions, see my complete tutorial on balancing all types of chemical equations:Balancing Equations in 5 Easy Steps: https://youtu.be/zmdxMlb88FsMore Practice Balancing: https://youtu.be/Qci7hiBy7EQDrawing/writing done in InkScape. Question. Thus, it is insoluble in water. Barium fluoride is used as a preopacifying agent and in enamel and glazing frits production. Question: The Mohr method is a technique for determining the amount of chloride ion in an unknown sample. I was going through JD Lee and I found certain contradictory statements. Hydroxide salts of Group I elements are soluble. {BaF2 : ~~~1.7 g/L}$ $\ce{BeF2}$ itself is mentioned as infinitely soluble in water. Generally, solutes are soluble in solvents that are most similar to them molecularly. Label each of the following as soluble or insoluble. Short story taking place on a toroidal planet or moon involving flying. It is a colorless solid that occurs in nature as the rare mineral frankdicksonite. The solubility rules are only for ionic solids' ability to dissolve in water. Its solubility in water at 25C is 7.36 10 4 g/100 mL. Substances on this list are given by their elemental names. Its other use is in the production of welding agents (an additive to some fluxes, a component of coatings for welding rods and in welding powders). BeF2 is soluble in water due to evolution of large hydration energy, when it is dissolved in water, which is sufficient enough to overcome the lattice energy of the Berylium Flouride, as for a compound to be soluble in water, the lattice energy of the compound must be less than the hydration energy evolved upon dissolution in water. The solubility product constant for BaF 2 at this temperature is 1.0 10 6. Magnesium fluoride is highly insoluble in water (0.0076 g/100 mL) at 18C [151]. 1. Ab initio calculations indicate that contributions from d orbitals in the shell below the valence shell are responsible. Transcribed image text: 2) Determine the molar solubility of BaF2 in pure water. AgCl There are essentially no HF molecules. When you are working on chemical equations or building a hypothesis, solubility rules are helpful in predicting the end states of the substances involved. Correct option is C) Let s be the solubility of BaF 2 in BaNO 3 solution. The expression for the solubility product is given by, K sp=[Ba 2+][F ] 2. The Ksp K s p for BaF 2 B a F 2 is 1.0 x 106 10 6 . http://periodic-table-of-elements.org/SOLUBILITY. How to notate a grace note at the start of a bar with lilypond? lattice energy is less than that of the energy of hydration. Question = Is C2Cl2polar or nonpolar ? In general, the solubility of a substance depends on not only the energetic factors we have discussed but also the temperature and, for gases, the pressure. What is the molar solubility of BaF2 in water? [9] Under standard conditions it adopts the fluorite structure and at high pressure the PbCl2 structure. Answer = if4+ isPolar What is polarand non-polar? Trying to understand how to get this basic Fourier Series, Acidity of alcohols and basicity of amines, Bulk update symbol size units from mm to map units in rule-based symbology. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Were going to go over what solubility is, how it works, and the complete list of solubility rules to help you determine the solubility of substances. Barium Fluoride BaF2 bulk & research qty manufacturer. Screen capture done with Camtasia Studio 4.0. The refractive index is about 1.46 from 700nm to 5m.[11]. One of its applications is the detection of 511 keV gamma photons in positron emission tomography. For example, a carbonated beverage is a solution where the solute is a gas and the solvent is a liquid. Arsenic, antimony, bismuth, and lead sulfides are also insoluble. The solubility of a substance is an entirely different property from the rate of solution, which is how fast it dissolves. What is Soluble and Insoluble ? National Library of Medicine. Term contracts & credit cards/PayPal accepted. Fluorides such as BaF2, MgF2, and PbF2 are frequently insoluble. (C) MgF 2 It is an inorganic compound. Barium fluoride (BaF2) is an inorganic compound with the formula BaF2. Our new student and parent forum, at ExpertHub.PrepScholar.com, allow you to interact with your peers and the PrepScholar staff. In this video we will describe the equation BaF2 + H2O and write what happens when BaF2 is dissolved in water. The solubility-product constant for BaF2 is 1.7x 10-6 at 25C. Solutes typically will dissolve best in solvents that have the most molecular similarities. Therefore whatever little solubility these fluorides have that increase down the group. Exceptions Ag+, Pb2+, and (Hg2)2+- most sulfates are soluble. Select the compounds that are always soluble in water, 2. H 2 O] is a sparingly soluble salt that is the other major component of kidney stones [along with Ca 3 (PO 4) 2 ]. Sure, I'll keep that in mind next time and thanks @BuckThorn. What is the molar solubility of barium fluoride (BaF2) in water? New Questions About Fantasy Football Symbols Answered and Why You Must Read Every Word of This Report. She loves reading, the outdoors, and learning about new things. It is very important that the rules on this list are followed in order, because if a rule seems to contradict another rule, the rule that comes first is the one that you follow. National Institutes of Health. Salts containing Cl -, Br -, or I - are generally soluble. This problem has been solved! Start with our study notes for IB Chemistry. Sign up for free to discover our expert answers. 1 What is the molar solubility of BaF2 in water? He holds bachelor's degrees in both physics and mathematics. Ksp for BaF2=2.45 x10^-5. Question: Is B2 2-a Paramagnetic or Diamagnetic ? The solubility of a substance fundamentally depends on the physical and chemical properties of the solute and solvent as well as on temperature, pressure and the pH of the solution. We use cookies to ensure that we give you the best experience on our website. Additionally, a solution is miscible when it can be mixed together at any ratio- this mainly applies to liquids, like ethanol, C2H5OH, and water, H2O. Question = Is IF4-polar or nonpolar ? To do so, first prepare an ICE (Initial, Change, and Equilibrium) table showing the equilibrium concentrations of the ions in terms of x, the molar solubility of the compound.Then, plug these expressions into the solubility-product expression for the compound and solve for the value of x. Its transmittance at 200nm is relatively low (0.60), but at 500nm it goes up to 0.960.97 and stays at that level until 9m, then it starts falling off (0.85 for 10m and 0.42 for 12m). The answer that Barium fluoride is Slightly Soluble in water. The other fluorides MF2 are are all almost insoluble. Two volatile liquids A and B have vapour pressures of 222 Torr and 444 Torr respectively in an ideal why cf3- does not form backbonding while cl3 form back bonding?. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. H 2 O] is a sparingly soluble salt that is the other major component of kidney stones [along with Ca 3 (PO 4) 2 ]. The solubility product constant for The solubility product constant for A: Ksp concept :Ksp : At normal temperature, if the solubility of a salt is 0.1mol / Lit then that salt Hydroxide salts of transition metals and Al3+ are insoluble. [14] Another proposal is that polarisation of the electron core of the barium atom creates an approximately tetrahedral distribution of charge that interacts with the Ba-F bonds.[15]. I'm confused about what the order is. Sodium chloride contains Na, which is almost always soluble according to rule 1, and Cl, which is usually soluble according to rule 3. Very low water solubility 2. Learn more about Stack Overflow the company, and our products. To learn more, see our tips on writing great answers. The (aq) shows that they are aqueous dissolved in water.The equation for BaF2 ( Barium fluoride and H2O sometimes isnt considered a chemical reaction since it is easy to change the Ba 2+ and F- back to BaF2 (just let the H2O evaporate). The solubility product of AgCl is 1.6 x 10-10.The solubility product of BaF2 is 2 x 10-6. It is used in windows for infrared spectroscopy, in particular in the field of fuel oil analysis. b. Answer = C2Cl2 is Polar What is polarand non-polar? Important exceptions to this rule are halide salts of Ag+, Pb2+, and (Hg2)2+. Given: solubility in g/100 mL. Given: solubility in g/100 mL. Check out Tutorbase! Note that a very small amount of BaF2 would dissolve but very little. The dissociation reaction of compound BaF 2 in water is: BaF2(s) Ba+ (aq) + 2 F- (aq) This reaction shows that for every single mole of BaF 2 that dissolves, 1 mole of Ba+ and 2 moles of F- are formed as a result. The solubility is similar to the concentration of the Ba ions in the solution. It adopts the fluorite structure and at high pressure the PbCl2 structure. Lead two fluoride forms lead two plus ions and fluoride anions in a one to two mole ratio. In rule #4, it states that silver salts (Ag) are insoluble, with silver nitrate, AgNO3, as one exception. Remember to keep your periodic tables handy, and pay close attention to the solubility rules in your next experiment. Asking for help, clarification, or responding to other answers. Barium fluoride is transparent from the ultraviolet to the infrared, from 150 to 200 nm to 1111.5m. A common threshold to describe something as insoluble is less than 0.1 g per 100 mL of solvent. Powdered NaF is then dissolved in the solution until the solubility of BaF2 is 1.0% of that in H2O alone. The ksp for BaF2 is 1.7 x 10^-6 . Whether or not a substance is soluble, and to what degree, depends on a variety of factors. What is the molar solubility of calcium carbonate ( CaCO3) in water? This is a useful factor in qualitative analysis. Polar "In chemistry, polarity i Is BaF2 ( Barium fluoride ) Soluble or Insoluble in water ? On the solubility table we can see that BaF2 (Barium fluoride ) is insoluble in water.Solubility Chart used in video: https://en.wikipedia.org/wiki/Solubility_chartBecause it is insoluble in water, we would expect that it would NOT dissociate into its ions.Solubility Resources:- Solubility Rules and the Solubility Table: https://youtu.be/zffVKN6tm7k- Net Ionic Equations: https://youtu.be/PXRH_IrN11Y- Finding the Charge on Ions: https://youtu.be/N4N1Njh7nCoWe could also just get some BaF2 and see if it dissolves in water, that would also tell us if it is soluble or insoluble.Based on the solubility rules and solubility chart we would expect Barium fluoride to be insoluble in water. Very good index match to water Disadvantages 1. The molar solubility of BaF2 in NaF is 1.0% of its solubility in pure water. The solubility of barium fluoride, BaF2, is 3.15 x 10-3M at 25 C. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Since on descending the group lattice energy decreases more rapidly than the hydration energy. Solubility is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent. The term insoluble is often applied to poorly or very poorly soluble compounds. In general, solutes will also be more soluble if the molecules in the solute are smaller than the ones in the solvent. Answer = SCl6 is Polar What is polarand non-polar? Most hydroxide salts are only slightly soluble. Helmenstine, Todd. Thalliumthiocyanate (2TlSCN) is only slightly in water. Are these statements contradictory because of the toxicity of beryllium compounds, which is why they have been studied less and are not spoken about frequently? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. In the vapor phase the BaF2 molecule is non-linear with an F-Ba-F angle of approximately 108. k=4.5 x 10^-9 sqrt (K) = 6.7 x 10^-5 . She worked in book publishing for several years, and believes that books can open up new worlds. ->BeF2 : is soluble in water due to evolution of large hydration energy, when it is dissolved in water, which is sufficient enough to overcome the lattice energy of the Berylium Flouride, as for a compound to be soluble in water, the lattice energy of the compound must be less than the hydration energy evolved upon dissolution in water. You will see in the solubility rules that many compounds that are labeled as insoluble have exceptions, such as carbonates. The solubility-product constant for CaCO3 is 4.5 10-9 at 25 C. Solubility = [Ba+] = 7.94 x 10-3M. [9] Under standard conditions it adopts the fluorite structure and at high pressure the PbCl2 structure. What makes barium fluoride insoluble in water? Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. Polar solutes will dissolve better in polar solvents, and non-polar solutes will dissolve better in non-polar solvents. What is the solubility trend of alkaline earth metal fluorides? If you need more non-chemistry science guides, be sure to check out these guides about finding the density of water, defining commensalism, and how to calculate acceleration. A solute is considered insoluble when they are unable to dissolve at a ratio greater than 10000:1. Hydroxide salts of Group II elements (Ca, Sr, and Ba) are slightly soluble. The solubility-product constant for BaF2 is 1.7 x 10^-6 at 25 C. Calculate its Ksp. ACT Writing: 15 Tips to Raise Your Essay Score, How to Get Into Harvard and the Ivy League, Is the ACT easier than the SAT? Most silver salts are insoluble. However, compounds that we know to be highly soluble, like salt, are likely to form solutions at various ratios; in this case, we will be able to determine how much solute and solvent is needed to form each solution, and if it's possible to form one at all. All rights reserved. However, sugar would have a low solubility in a nonpolar liquid like vegetable oil. How can you explain the solubility of BeF2? ThoughtCo. Calculate the solubility product, Ksp, of both compounds. chemistry.stackexchange.com/questions/127687/, We've added a "Necessary cookies only" option to the cookie consent popup. 2-. It adopts the fluorite structure and at high pressure the PbCl2 structure. The solubility-product constant for BaF2 is 1.7x 10-6 at 25C. It only takes a minute to sign up. Solubility depends entirely on the physical and chemical properties of the solute and solvent, and isnt affected by the rate of solution. PubChem . Creative Commons Attribution/Non-Commercial/Share-Alike. 7 10 - 6 at 25C. Does adding a strong acid increase solubility? BaF2(s) Ba2+(aq) + 2F-(aq) Because the state is going from Solid to aqueous. Carbonates are frequently insoluble. (aq) + CO3 2- (aq). Is calcium oxide an ionic or covalent bond . The 5 Strategies You Must Be Using to Improve 4+ ACT Points, How to Get a Perfect 36 ACT, by a Perfect Scorer. Calculate the concentration of fluoride ion in the solution after addition of . 94% of StudySmarter users get better grades. Exceptions: NH4+, Li+, Na+, K+- most carbonates (CO32-) are insoluble. Free and expert-verified textbook solutions. The extent of the solubility of a substance in a specific solvent is measured as the saturation concentration, where adding more solute does not increase the concentration of the solution and begins to precipitate the excess amount of solute. . What is the purpose of non-series Shimano components? Is BaF2 (Barium fluoride) soluble or insoluble in water? Although it is an ionic compound, it does not dissociate much into its ions in water, however a small amount does dissolve.When the small amount of BaF2 is dissolved in H2O (water) it will dissociate (dissolve) into Ba 2+ and F- ions. Is SbCl5 ( Antimony pentachloride ) polar or nonpolar ? On this Wikipedia the language links are at the top of the page across from the article title. It is also used in metallurgy, as a molten bath for refining aluminium. Making statements based on opinion; back them up with references or personal experience. The solubility rules are only for ionic solids' ability to dissolve in water. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. MathJax reference. Study with our articles on every AP Chemistry practice test available and the ultimate AP Chem study guide. The solubility product Ksp of BaF2 is 1.710^-6 at 25C. Exceptions: Group 1 and NH4+Note: Rules at the top supersede any lower rules.---We can also look a Solubility Table (https://youtu.be/b0pDquyGSdk). Important exceptions to this rule include CaSO4, BaSO4, PbSO4, Ag2SO4 and SrSO4 . Its KSP at 250c is 1.82X10-4 . See Answer Question: What is the molar solubility of barium fluoride (BaF2) in water? To show that they are dissolved in water we can write (aq) after each. The rate of solution refers to how quickly a substance dissolves, and is separate from solubility. We store cookies data for a seamless user experience. SAT is a registered trademark of the College Entrance Examination BoardTM. Explanation for incorrect options: (A) BeF 2 It is soluble due to high hydration energy which can easily overcome the lattice energy. It is $\ce{CaF2}$. Solution The key to solving solubility problems is to properly set up your dissociation reactionsand define solubility. We receieved your request, Stay Tuned as we are going to contact you within 1 Hour. Phosphates such as Ca3(PO4)2 and Ag3PO4 are frequently insoluble. Therefore, it is insoluble in water. Ksp is really nothing new. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Fluorides such as BaF2, MgF2, and PbF2 are frequently insoluble . So, the minimum solubility is in the middle of the series.