10
QuizMultiple Choice

Shifts in Equilibrium — Quiz

Question 10 • Chemistry

Consider the chemical equilibrium of the reaction. NH sub 4 OH A q if and only if NH sub 4 raised to the plus A q power plus OH raised to the negative e q power What will happen to the chemical equilibrium if NH sub 4 Cl is added to this solution?

Answer
A
The chemical equilibrium will not shift.
B
The chemical equilibrium will shift to the right.
C
The chemical equilibrium will shift to the left.
D
The chemical equilibrium will be lost.

Explanation

NH₄Cl dissolves and adds NH₄⁺ ions to the solution. Because NH₄⁺ is a product in the equilibrium NH₄OH ⇌ NH₄⁺ + OH⁻, adding more of it shifts the equilibrium to the left to use up some of the added ion. Thus, the equilibrium shifts toward NH₄OH.

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