Q13. What volume (mL) of 1.00 M K2Cr,0, is required to completely react with 35.0 mL of 0.500 M FeS K2Cr,07(aq) +6FeSO4(aq) + 7H2SO4(aq) → Cr2(SO4)3(aq) +3FE2(SO.)3(a0) + K;SO4laq) + 7H,0L A. 2.92 B. 58.4 С. 292 D. 9. 60
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- The Handbook of Chemistry and Physics (http://openstaxcollege.org/l/16Handbook) gives solubilities of the following compounds in grams per 100 mL of water. Because these compounds are only slightly soluble, assume that the volume does not change on dissolution and calculate the solubility product for each. (a) BaSeO4, 0.0118 g/100 mL. (b) Ba(BrO3)2H2O, 0.30 g/100 mL. (c) NH4MgAsO46H2O, 0.033 g/100 mL. (d) La2(MoO4)3, 0.00179 g/100 mLThe Handbook of Chemistry and Physics (http://openstaxcollege.org/l/16Handbook) gives solubilities of the following compounds in grams per 100 mL of water. Because these compounds are only slightly soluble, assume that the volume does not change on dissolution and calculate the solubility product for each. (a) BaSiF6, 0.026 g/100 mL (contains SiF62- ions) (b) Ce(IO3)4, 1.5102 g/100 mL (c) Gd2(SO4)3, 3.98 g/100 mL (d) (NH4)2PtBr6, 0.59 g/100 mL (contains PtBr62- ions)The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CaCO3. What is the molar concentration of Ca2+ ions in a water sample with a hardness count of 175mg CaCO3il? How many milliliters of concentrated sulfuric acid, 94.0% (w/w), specific gravity of 1.831 are required to prepare 1 liter of a 0.100 M solution? The solubility-product constant for Ce(IO3)3 is 3.2x1010. What is the Ce3+ concentration in a solution prepared by mixing 50.0 ml of 0.0250 M Ce3.. with 50.00 ml of water?
- The solutbility constant for Ce(IO3)3 is 3.2x10^-10. What is the Ce3+ concentration in a solution prepared by mixing 50 mL of 0.0450 M Ce3+ with 50 mL of: A.) 0.0450 M IO3- ? B.) 0.0500 M IO3- ?A 370.00 mL solution of 0.00185 M A3B4 is added to a 390.00 mL solution of 0.00100 M C3D4. What is pQsp for A3D4?The Ksp of Pbl2 is 8.4 x 10^-9. The molar mass of Pbl2 is 461.03 g/mol. The mass solubility (g/L) of Pbl2 in 0.015 M Pb(NO3)2 is?
- 1.1The Ksp of Ca3 (PO4 ) 2 is 1.3 × 10−26 . Estimate the solubility of this salt in units of g. L −1 . You must show any reaction equation(s) that you may think are necessary. 1.2 If a sample of solid Ca3(PO4)2 is stirred into exactly one litre of a 0.550M solution of Na3PO4, how will the solubility of the salt compare with the answer that you have obtained in question 1.1? Explain you answer in a short sentence.How many grams of Ag2CO3 will be soluble in 250 ml of 0.180 M AgNO3? (Ksp of Ag2CO3 = 5.95 x 10-10) Cr2O72- + 14 H+ + 6 e ----- 2 Cr3+ + 7H2O Eo = - 1.25 VMnO4- + 8 H+ + 5 e ---- Mn2+ + 4 H2O Eo = - 1.27 VFe3+ + e ------ Fe2+ Eo = - 1.20 VZn2+ + 2e --------- Zn Eo = - 0.76 V ( R = 0.08205 L.atm/mol.K; R = 8.314 J/mol.K; F = 96481 C/mol electron) ΔG = ΔH – TΔS ; E = Eo - 0.0257 ln Q ; ΔG = ΔGo + RT ln QThe mass of K3PO4 needed to prepare 250.0mL of an aqueous solution in which PO4-3 concentration is 0.0550M. The answer is ……………………… How many grams of silver sample is equal to 0.0417 mole of silver The answer is ……………………… When 38.0 mL of 0.1250 M H2SO4 is added to 100 mL of a solution of PbI2, a precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and weighed. If the recovered PbSO4 is found to have a mass of 0.0471g, what was the concentration of iodide ions in the original solution The answer is ……………………………… Express 96.342 m using 2 significant figures The answer is ………………………………. The oxidation number of sulfur in (Na2S2O5) is? The answer is ………………………………
- (a) I f t he molar solubilit y o f CaF2 at 35 °C i s1.24 x 10-3 mol/L, what is Ksp at this temperature? (b) It isfound that 1.1 x 10-2 g SrF2 dissolves per 100 mL of aqueoussolution at 25 °C. Calculate the solubility product forSrF2. (c) The Ksp of Ba(IO3)2 at 25 °C is 6.0 x 10-10. What isthe molar solubility of Ba(IO3)2?How many grams of Ag2CO3 will be soluble in 100 ml of 0.145 M AgNO3? (Ksp of Ag2CO3 = 3.95 x 10-9)7.A solution is prepared by dissolving 0.030 mol of potassium perchlorate in 75 mL of hot water. KClO4 dissolves according to the equation KClO4 (s) ? K+ (aq) + ClO4- (aq). Will a precipitate form if the solution is cooled to 25oC? Assume that a negligible change in volume occurs during the operations. (Ksp = 8.9 x 10-3).