Question

A beaker contains 300.0 ml of a 0.20 M Pb(NO,), solution. If 200.0 ml of a 0.20 M solution of MgCl, is added to the beaker, what will be the final

concentration of Pb?* ions in the resulting solution?
(A) 0.020 M
(B) 0.040 M
(C) 0.080 M
(D) 0.120 M
(E) 0.150 M

Answer 1

A.0.020 M

because Pb lead is added on only 300 ml breaker but it was not added in 200 ml breaker.