Question

A solution is prepared by mixing 13.00 ml of .0021 M aqueous Hg2(NO3)2 with 25 ml of .015M HCL. Assme that volumes are additive.

a) Will precipitation occur?
b) Calculate [HG2 2+], [CL-], and [NO3] after equilibrium is established.

Answer 1

Write the reaction as if it occurs. Convert L and M to moles. moles = M x L.

Calculate the reaction quotient, Q, for the reaction and compare that with Ksp for Hg2Cl2. A ppt will occur if Qsp>Ksp.

b) Set up an ICE chart and substitute into Ksp.

Answer 2

Yes