Question

A 1. 0 l solution of agno3 and pb(no3)2 has a ag concentration of 0. 20

Answer 1

With an Ag concentration of 0.020 M and a Pb2+ concentration of 0.0010 M, Only PbSO₄(s) will precipitate. The correct option is C.

What is molarity?

Molarity is the measure of the concentration of any solute in per unit volume of the solution.

The equations are

$\rm Ag_2SO_4--- > 2Ag++SO4^{-2}$

$PbSO_4--- > Pb_2+ +SO4^{-2}$

Therefore:

$Ag_2SO_4=[0.02^2[0.001]]\\Ag_2SO_4=4 \times 10^{-7}$

and

$PbSO_4=[0.001^2[0.001]]\\PbSO_4=4*10^{-6}$

Since, $PbSO_4 > > PAg_2SO_4$, only  PbSO₄ will precipitate.

Thus, the correct option is (C) Only PbSO₄(s) will precipitate.

Learn more about precipitation

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