JAMB Chemistry 2007 Objective — Question 29

Question 29 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2007 Objective paper, with the correct answer and a full explanation.

Cu2+(aq) + 4NH3(aq) <=> [Cu(NH3)4]2+(aq). In the reaction above, what is the effect of removing/precipitating Cu2+ from the equilibrium?

A. There will be no effect
B. The equilibrium will shift to the right
C. More NH3(aq) will be generatedCorrect
D. NH3(aq) concentration will decrease

Explanation

Removing Cu2+ shifts the equilibrium backward (left) to replace it, releasing (generating) more free NH3.

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