Chem 102 - General Chemistry II » Summer 2021 » Quiz 3

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Question #1
Write the solubility product constant expression for the reaction of Calcium Fluoride (CaF2)(s)) dissolving to Calcium-ion and Fluoride-ion. 
A.   Ksp = [Ca2+] [F–]^2
B.   Ksp = [Ca2] [F+]^2
Question #2
The solubility product constant of silver acetate (AgC2H3O2) is 2.0 x 10–3.  The solubility product constant of silver chloride (AgCl)  is                1.8 x 10–10.  Which salt is least soluble?  Briefly explain your answer for full credit. 
A.   AgCl is less soluble because its Ksp is smaller than Ksp of AgC2H3O4
B.   silver acetate is more soluble because it has a greater solubility product constant with silver acetate having a solubility of equal to 0.0447 M and silver chloride has solubility equal to 1.34x10^-5
Question #3
The ionic concentration of a salt that has dissolved into a saturated solution is 7.4 x10–5 M. What is the molar solubility of the salt? The salt has a molecular weight of 342.3 g/mol.   
A.   Molar solubility = 7.4 x10–5 M
B.   Molar solubility = 7.1 x10–5 M
Question #4
The ionic concentration of a salt that has dissolved into a saturated solution is 9.7 x10–4 M. What is the solubility of the salt? The salt has a molecular weight of 213.7 g/mol.  
A.   0.207 g/L
B.   0.217 g/L
Question #5
The solubility product constant of silver acetate (AgC2H3O2) is 2.0 x 10–3.  The solubility product constant of silver chloride (AgCl)  is 1.8 x 10–10. If 0.280 M AgC2H3O2 is placed in a solution of AgCl, what is the common-ion? 
A.   Cl
B.   Ag+1

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