Question 1
A sample contains Ba
3(PO
4)
2,
CdS, AgCl, NH
4Cl, and ZnS. Identify the soluble salt remaining in the solution after the addition of 6 mol L
-1 HCl, followed by the addition of H
2S and 0.2 mol L
-1 HCl, then the addition of OH
- to a pH of 8, and finally the addition of (NH
4)
2HPO
4 with NH
3.
◦ Ba
3(PO
4)
2◦ ZnS
◦ AgCl
◦ CdS
◦ NH
4Cl
Question 2
A ligand is a molecule or ion that acts as a(n)
◦ Lewis acid.
◦ Bronsted-Lowry base.
◦ Arrhenius acid.
◦ Bronsted-Lowry acid.
◦ Arrhenius base.
◦ Lewis base.