A very small amount of a slightly soluble salt like Zn(OH)_2 would be least solu

Question

A very small amount of a slightly soluble salt like Zn(OH)_2 would be least soluble in a. dilute HNO_2 solution b. 0.001 M NaOH solution c. dilute solution of KCl d. water What is the solubility product expression for Au(OH)_3? a.) Ksp = [Au^3+] [OH] b.) Ksp = [Au^3+] [OH]^3 c.) Ksp = [Au^3+ [3 OH] d.) Ksp = [Au?3+] [3 OH]^3 The net ionic equation for the reaction of solutions of Fe(NO_3)_2 with Na_2C_2O_4 is a. Fe^2+ (aq) + c_2o_4^2+(aq) rightarrow FeC_2O_4(s) b. Fe C_2O_4(s) rightarrow Fe^2+(aq) + C_2O_4^2+(aq) c. Fe^2+ 2 Na^+ + 2 NO_3^- + C_2O_4^2- rightarrow FeC_2O_4 + 2 Na+ + 2 NO_3^- d. Fe^2+(aq) + 2 NO_4^- + rightarrow Fe(NO_3)_2(s) which of these salts is the most soluble? a. AgCI Ksp = 1.7 times 10^-10 b. CaCO_3 Ksp = 9.0 times 10^-9 c. PbSO_4, Ksp = 6.3 times 10^-7 d. BaCrO_4 Ksp = 2.4 times 10^10. The equilibrium equation for the slightly soluble salt CaC_2O_4 is a. CaC_2O_4 (aq) longleftrightdoublearrow Ca^2+ + 2 C^2+ +O4^2- b. CaC_2O_4 (s) longleftrightdoublearrow Ca^2+ (aq) + 2C^2+(aq) + 2O^2(g) c. CaC_2O_4(s) longleftrightdoublearrow Ca^+(aq) + C_2O_4^2- (aq) d. none of these The solubility of aqueous lead chloride can be decreased by all of the following EXCEPT a. adding NaCl b, cooling the solution c. adding Pb(NO_3)_2 d. raising the temperature If the ion product equals the Ksp a. the solution resists changes in pH b. a precipitate forms c. the resulting solution is saturated d. all of the above The relationship between the molar solubility, (s), and the Ksp for AgCrO_4 is a. Ksp = 2s^6 b. Ksp = 4s^3 c. Ksp = s^2 d. Ksp = s^1/3 If the concentration of Br is 1 times 10^-5 M in a saturated solution of AgBr which has a Ksp of 5 x 10 is, what is the concentration of the Ag a. 1 x 10 M in a saturated solution of AgBr which has a Ksp of 5 times 10^25, what is the concentration of the Ag^? a. 1 times 10^-5 M b, 5 times 10^-20 M c. 2 times 10^5 M d. 5 times 10^-10

Explanation / Answer

Ans 1. (d)

Zn (OH)2 is leadt soluble in water.

reason : when zinc dissolves in water it forms a water insoluble zinc hydoxide leyer which do not react further.

Ans 2. (b)

Ksp = [Au3+][OH–]3

Reason : Each Au(OH)3 that "dissolves" releases --> X Au & 3X (OH)-
&
since Ksp = [Au] [OH]^3

Ans 3 . (c)

Ans 4 . (b)

Ans 5 . (d)

Ans 6 . (d) raising the temperature will not decrease the solubility because when we increase the temperature then energy increases and solubility increases.

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