Question

Select the correct answer.

In which reaction is precipitation occurring?

A.
MgCl2(aq) + CuSO4(aq) → CuCl2(aq) + MgSO4(aq)
B.
CdSO4(aq) + K2S(aq) → CdS(s) + K2SO4(aq)
C.
NaOH(aq) + NH4Cl(aq) → NaCl(aq) + NH4OH(aq)
D.
K2SO4(aq) + NaOH(aq) → K2OH(aq) + NaSO4(aq)
E.
HNO3(aq) + KOH(aq) → KNO3(aq) + H2O(l)

Answer 1

Answer:

B. CdSO4(aq) + K2S(aq) → CdS(s) + K2SO4(aq)

Explanation:

A precipitate reaction is when a solid forms, so in this case CdS is the precipitate.