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Consider the Gibbs energies at 25 ∘C. Substance Δ?∘f (kJ·mol−1) Ag+(aq) 77.1 Cl−(aq) −131.2 AgCl(s) −109.8 Br−(aq) −

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter16: Spontaneity Of Reaction

Section: Chapter Questions

Problem 62QAP: Consider the reaction NH4+(aq) H+(aq)+NH3(aq) Use G f for NH3(aq) at 25C=26.7 kJ/mol and the...

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Question

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Consider the Gibbs energies at 25 ∘C.

Substance			Δ?∘f (kJ·mol−1)
Ag+(aq)			77.1
Cl−(aq)			−131.2
AgCl(s)			−109.8
Br−(aq)			−104.0
AgBr(s)			−96.9

a) Calculate Δ?∘rxn for the dissolution of AgCl(s).

(b) Calculate the solubility-product constant of AgCl.

d) Calculate the solubility-product constant of AgBr.

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Step 1: Determine the ∆G°rxn and Ksp (Solubility product) :

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Step 2: a. Calculation for ∆G°rxn for AgCl(s)

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Step 3: b. Calculation for Ksp of AgCl:

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Step 4: c. Calculation for ∆G°rxn for AgBr

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Step 5: d. Calculation for Ksp of AgBr:

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