A compound is found to be soluble in water. it was also found that addition of a

Question

A compound is found to be soluble in water. it was also found that addition of acid to an aqueous solution of this compound resulted in the formation of carbon dioxide. which one of the following cations would form a precipitate when added to an aqueous solution of this compound? Please explain 17. A compound was found to be soluble in water. It was also found that addition of acid to an aqueous solution of this compound resulted in the formation of carbon dioxide. Which one of the following cations would form a precipitate when added to an aqueous solution of this compound? a. NH4 b. K c. Cr d. Rb e. Na

Explanation / Answer

Answer is option(c).

Cr3+(aq) + CO32-(aq) ------------> Cr2CO3(s)

The compound is containing CO32- ion.

If acid reacts with it, CO2 evolves.

H+ + CO32- ----------> H2O + CO2

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