Chemistry Study Guide

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Unit 18 B Study Guide

1.Find the solubility (in mol/L) of lead(II) chloride (PbCl2) at 25oC. Ksp = 1.62e–5. A)1.59e–2
B)2.53e–2
C)6.64e–17
D)2.01e–3
E)2.01e–2

2.The two salts AgX and AgY have very similar solubilities in water. It is known that the salt AgX is much more soluble in acid than is AgY. What can be said about the relative strengths of the acids HX and HY? A)Nothing.

B)HY is stronger than HX.
C)HX is stronger than HY.
D)The acids have equal strengths.
E)Cannot be determined.

3.Solubility Products (Ksp)
BaSO41.5 ´ 10-9
CoS5.0 ´ 10-22
PbSO41.3 ´ 10-8
AgBr5.0 ´ 10-13
Which of the following compounds is the most soluble (in miles/liter)? A)BaSO4
B)CoS
C)PbSO4
D)AgBr
E)BaCO3

4.How many moles of Fe(OH)2 [Ksp = 1.8 10-15] will dissolve in 1.0 liter of water buffered at pH = 11.52? A)1.6e–10
B)3.3e–3
C)1.1e–5
D)6.1e9
E)5.4e–13

5.You have two salts, AgX and AgY, with very similar Ksp values. You know that Ka for HX is much greater than Ka for HY. Which salt is more soluble in acidic solution? A)AgX
B)AgY
C)They are equally soluble in acidic solution.
D)Cannot be determined by the information given.
E)None of these (a-d).

6.You have a solution consisting of 0.10 M Cl– and 0.10 M CrO42–. You add 0.10 M silver nitrate dropwise to this solution. Given that the Ksp for Ag2CrO4 is 9.0 × 10–12, and that for AgCl is 1.6 × 10–10, which of the following will precipitate first? A)silver chloride

B)silver chromate
C)silver nitrate
D)cannot be determined by the information given
E)none of these

7.Which of the following compounds has the lowest solubility in mol/L in water? A)Al(OH)3 Ksp = 2 × 10–32
B)CdS Ksp = 1.0 × 10–28
C)PbSO4 Ksp = 1.3 × 10–8
D)Sn(OH)2 Ksp = 3 × 10–27
E)MgC2O4 Ksp = 8.6 × 10–5

8.The solubility of CaSO4 in pure water at 0oC is 1.38 gram(s) per liter. The value of the solubility product is A)1.01e–2
B)1.38e–3
C)1.01e–1
D)1.03e–4

9.The solubility of AgCl in water is _____ the solubility of AgCl in strong acid at the same temperature. A)greater than
B)less than
C)about the same as
D)cannot be determined
E)much different from

10.The molar solubility of PbI2 is 1.47e–3 M. Calculate the value of Ksp for PbI2. A)3.18e–9
B)4.32e–6
C)1.27e–8
D)1.47e–3
E)none of these

11.Calculate the concentration of chromate ion, , in a saturated solution of CaCrO4. (Ksp = 7.08e–4) A)2.66e–2 M
B)1.42e–3 M
C)7.08e–4 M
D)5.01e–7 M
E)3.54e–4 M

12.Calculate the concentration of the silver ion in a saturated solution of silver chloride, AgCl (Ksp = 1.63e–10). A)1.63e–10
B)1.28e–5
C)2.66e–20
D)3.26e–10
E)none of these

13.The molar solubility of BaCO3 (Ksp = 1.6 × 10–9) in 0.10 M BaCl2 solution is: A)1.6 × 10–10
B)4.0 × 10–5
C)7.4 × 10–4
D)0.10
E)none of these

14.It is observed that 7.48 mmol of BaF2 will dissolve in 1.0 L of water. Use these data to calculate the value of Ksp for barium fluoride. A)1.1e–4
B)4.2e–7
C)1.7e–6
D)2.2e–4
E)5.6e–5

15.The Ksp of AgI is 1.5 10-16. Calculate the solubility in mol/L of AgI in a 0.29 M NaI solution. A)4.4e–17
B)0.29
C)1.5e-16
D)1.2e–8
E)5.2e–16

16.The molar solubility of AgCl (Ksp = 1.6 10-10) in 0.0013 M sodium chloride at 25oC is: A)0.0013
B)2.1e–13
C)1.2e–7
D)1.6e-10
E)none of these

17.Silver chromate, Ag2CrO4, has a Ksp of 8.95e–12. Calculate the solubility in mol/L of silver chromate. A)1.31e–4 M
B)1.65e–4 M
C)2.25e–12 M
D)2.08e–4 M
E)1.50e–6 M

18.The solubility in mol/L of Ag2CrO4 is 1.2e–4 M. Calculate the Ksp for this compound. A)2.9e–8
B)1.2e–4
C)6.9e–12
D)1.7e–12
E)2.4e–4

19.Calculate the concentration of Al3+ in a saturated aqueous solution of Al(OH)3 (Ksp = 1.8e–32). A)6.7e–9
B)1.7e–34
C)1.2e–8
D)6.7e–34
E)5.1e–9

20.The solubility in mol/L of M(OH)2 in 0.016 M KOH is 1.0 10-5 mol/L. What is the Ksp for M(OH)2? A)...
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