The
K
sp
of PbCrO
4
is 1.0 X 10
–16
. What is the molar solubility of PbCrO
4
in a solution with pH of 4?
1.0 X 10
–4
1.0 X 10
–8
1.0 X 10
–16
1.0 X 10
–20
1.0 X 10
–22