Question

OWL question so its 3 parts

Part A

A solution contains 9.25×10-3 M aluminum nitrate and 5.90×10-3 M copper(II) acetate. Solid sodium hydroxide is added slowly to this mixture. What is the concentration of aluminum ion when copper(II) ion begins to precipitate?

[Al3+] = M

Part B

A solution contains 1.29×10^-2 M iron(II) acetate and 9.60×10^-3 M manganese(II) nitrate.
Solid potassium hydroxide is added slowly to this mixture.

What is the concentration of iron(II) ion when manganese(II) ion begins to precipitate?
[Fe²⁺] = M

Part C

A solution contains 1.02×10^-2 M ammonium carbonate and 5.02×10^-3 M sodium phosphate.
Solid silver nitrate is added slowly to this mixture.

What is the concentration of phosphate ion when carbonate ion begins to precipitate?
[phosphate] = M