9
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Writing and Balancing Chemical Equations

Question 9 • IA-Chemistry A Survey of Chemistry A

Na2S + Cd(NO3)2 → CdS + 2NaNO3

Answer
A
cadmium sulfide
B
sodium nitrate
C
cadmium nitrate
D
no precipitate formed

Explanation

In this double-replacement reaction, the products are cadmium sulfide (CdS) and sodium nitrate (NaNO3). Most sulfides are insoluble in water, and cadmium sulfide is an insoluble solid, so it forms a precipitate. The precipitate is cadmium sulfide, choice A.

AI-written and checked against the verified answer.

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