 # Question & Answer: A solution of lead acetate, calcium nitrate, and magnesium chloride are mixed. The resulting….. A solution of lead acetate, calcium nitrate, and magnesium chloride are mixed. The resulting solution is 0.055M in Pb(C_2H_3O_2)_2, 0.015M in Ca(NO_3)_2 and 0.035M in MgCl_2. Will a precipitate form in the mixed solution? If so identify the precipitate

Yes , precipitate will form in the mixed solution

The precipitate is PbCl2

Don't use plagiarized sources. Get Your Custom Essay on
Question & Answer: A solution of lead acetate, calcium nitrate, and magnesium chloride are mixed. The resulting…..
GET AN ESSAY WRITTEN FOR YOU FROM AS LOW AS \$13/PAGE

Explanation

The equillibrium involved in solubility of PbCl2 is

PbCl2(s) <——-> Pb2+(aq) + 2Cl-(aq)

solubility product, Ksp = [ Pb2+ ] [ Cl- ]^2 = 1.7×10^-4

solubility product quotient,

Qsp = [ Pb2+ ] × [ Cl- ]^2

[ Pb( C2H3O2)2] = 0.055M

Pb(C2H3O2)2 contain 1 Pb

So , [ Pb2+ ] = 0.055M

[ MgCl2 ] = 0.035M

MgCl2 contain 2Cl

so, [ Cl- ] = 0.070M

Therefore,

Qsp = (0.055) ×(0.070)^2

= 2.7×10^-4

So, Qsp > Ksp

Therefore, precipitation of PbCl2 will form