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a) In which of the below reactions is metal sulfide dissolution more energetically favorable? MnS + H* +→ Mn²+ + HS- CUS + H* +→ Cu²+ + HS- b) Classify each reaction as exothermic or endothermic based on the AG,º. c) What is the Kan of MnS and CuS? d) Which is more soluble?

a) In which of the below reactions is metal sulfide dissolution more energetically favorable? MnS + H* +→ Mn²+ + HS- CUS + H* +→ Cu²+ + HS- b) Classify each reaction as exothermic or endothermic based on the AG,º. c) What is the Kan of MnS and CuS? d) Which is more soluble?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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a) In which of the below reactions is metal sulfide dissolution more energetically favorable?

MnS + H+ <--> Mn2+ + HS-

CuS + H+ <--> Cu2+ + HS-
b) Classify each reaction as exothermic or endothermic based on the (Delta)Gr0.
c) What is the Ksp of MnS and CuS?

d) Which is more soluble?

(Delta)Gr0 Values:

MnS: -218.0     H+: 0          Mn2+: -228.1       HS-: 12.2
CuS: -49.1        H+: 0          Cu2+:  65.5           HS-: 12.2

**a)** In which of the below reactions is metal sulfide dissolution more energetically favorable? \[ \text{MnS + H}^+ \leftrightarrows \text{Mn}^{2+} + \text{HS}^- \] \[ \text{CuS + H}^+ \leftrightarrows \text{Cu}^{2+} + \text{HS}^- \] **b)** Classify each reaction as exothermic or endothermic based on the \( \Delta G_r^0 \). **c)** What is the \( K_{sp} \) of MnS and CuS? **d)** Which is more soluble?
Transcribed Image Text:**a)** In which of the below reactions is metal sulfide dissolution more energetically favorable? \[ \text{MnS + H}^+ \leftrightarrows \text{Mn}^{2+} + \text{HS}^- \] \[ \text{CuS + H}^+ \leftrightarrows \text{Cu}^{2+} + \text{HS}^- \] **b)** Classify each reaction as exothermic or endothermic based on the \( \Delta G_r^0 \). **c)** What is the \( K_{sp} \) of MnS and CuS? **d)** Which is more soluble?
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