For each of the salts below, match the salts so that can be compared directly, using Ksp values, to estimate solubilities. 1. silver sulfate
2. copper(II) carbonate

a. PbI2
b. CaCO3
c. CaCrO4
d. Ca3(PO4)2

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.