A precipitation reaction is a type of double displacement reaction where a preci

ID: 885425 • Letter: A

Question

A precipitation reaction is a type of double displacement reaction where a precipitate is formed. Which of the following is a precipitation reaction?

HClO4(aq) + KOH(aq) --> KClO4(g) + H2O(l)

NaHCO3(s) + HBr(aq) --> NaBr(aq) + H2O(l) + CO2(g)

Na2CO3(aq) + ZnCl2(aq) --> ZnCO3(s) + 2NaCl(aq)

Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)

2NaCl(aq) + Pb(NO3)2(aq) --> PbCl2(s) + 2NaNO3(aq)

HClO4(aq) + KOH(aq) --> KClO4(g) + H2O(l)

NaHCO3(s) + HBr(aq) --> NaBr(aq) + H2O(l) + CO2(g)

Na2CO3(aq) + ZnCl2(aq) --> ZnCO3(s) + 2NaCl(aq)

Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)

2NaCl(aq) + Pb(NO3)2(aq) --> PbCl2(s) + 2NaNO3(aq)

Precipitation reaction is the one in which solid phase is formed when aqueous phase reactants react.

This is identify when there is insoluble product formed in the reaction.

In above given reactions,

Reaction c

Na2CO3(aq) + ZnCl2(aq) --> ZnCO3(s) + 2NaCl(aq)

and

reaction E

2NaCl(aq) + Pb(NO3)2(aq) --> PbCl2(s) + 2NaNO3(aq)

Are you precipitation reaction

since in these reaction, solid products are formed.

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