Chemistry WAEC

Which of the following can be added to dissolve the precipitate formed in the reaction represented by the following equation?

CaCl2(aq) + H2C2O4(s) ⇌ CaC2O2

A. Calcium chloride solution
B. Concentrated hydrochloric acid
C. Ethanol
D. Ethanedioc acid
E. Aqueous ammonia

Correct Answer:

Option E – Aqueous ammonia

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