General Chemistry
General Chemistry
4th Edition
ISBN: 9781891389603
Author: Donald A. McQuarrie, Peter A. Rock, Ethan B. Gallogly
Publisher: University Science Books
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Chapter 22, Problem 22.86P

(a)

Interpretation Introduction

Interpretation:

The effect on solubility of solid zinc sulphide when nitric acid is added to a saturated zinc sulphide solution has to be determined.

Concept Introduction:

Le Chatelier’s principle: When a system at equilibrium is disturbed by changing the volume, pressure, temperature or concentrations of the products and concentration of the reactants, the system will adjust itself to nullify the effect and maintain the equilibrium.

  • When concentrations of the products are increased, equilibrium will shift towards the left, producing more reactants.
  • When concentrations of the reactants are increased, equilibrium will shift towards the left, producing more products.
  • Increase in pressure (or decrease in volume) will shift the equilibrium to direction where there is a decrease in gaseous molecule.  Decrease in pressure (or increase in volume) will shift the equilibrium towards the direction where there is an increase in the gaseous molecule.

(b)

Interpretation Introduction

Interpretation:

The effect on solubility of solid silver iodide when ammonia is added to a saturated silver iodide solution has to be determined.

Concept Introduction:

Refer to (a)

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