Solid nickel(II) acetate is slowly added to 150 mL of a 0.0438 M potassium carbonate solution. The concentration of nickel ion required to just initiate precipitation is

Solid nickel(II) acetate is slowly added to 150 mL of a 0.0438 M potassium carbonate solution....
1) Solid potassium carbonate is slowly added to 150 mL of a 0.0546 M nickel(II) acetate solution. The concentration of carbonate ion required to just initiate precipitation is ____M? 2) Solid silver nitrate is slowly added to 75.0 mL of a 0.0305 M ammonium sulfite solution. The concentration of silver ion required to just initiate precipitation is ___M?
Solid nickel(II) acetate is slowly added to 125 mL of a 0.0665 M ammonium carbonate solution. The concentration of nickel ion required to just initiate precipitation is M.
A) Solid nickel(II) nitrate is slowly added to 175 mL of a 0.0527 M potassium cyanide solution. The concentration of nickel ion required to just initiate precipitation is __________ M ? B) Solid manganese(II) acetate is slowly added to 150 mL of a 0.0530 M potassium hydroxide solution. The concentration of manganese(II) ion required to just initiate precipitation is ______ M.?
Solid potassium carbonate is slowly added to 125 mL of a 0.0567 M barium acetate solution. The concentration of carbonate ion required to just initiate precipitation is____M.
Solid nickel(II) nitrate is slowly added to 75.0 mL of a 0.0675 M potassium eyanide solution. The concentration of nickel ion required to just initiate precipitation is M.
1) Solid lead acetate is slowly added to 50.0 mL of a 0.0486 M potassium hydroxide solution. The concentration of lead ion required to just initiate precipitation is _____ M. 2) Solid sodium carbonate is slowly added to 125 mL of a 0.0406 M zinc nitrate solution. The concentration of carbonate ion required to just initiate precipitation is ______ M.
A.) Solid lead acetate is slowly added to 50.0 mL of a 0.0624 M sodium chromate solution. The concentration of lead ion required to just initiate precipitation is __M B.) Solid potassium hydroxide is slowly added to 50.0 mL of a 0.0636 M nickel(II) acetate solution. The concentration of hydroxide ion required to just initiate precipitation is __M
Solid cobalt(II) nitrate is slowly added to 150 mL of a 0.0472 M potassium hydroxide solution. The concentration of cobalt(II) ion required to just initiate precipitation is M.
1.Solid ammonium sulfide is slowly added to 150 mL of a 0.0663 M zinc nitrate solution. The concentration of sulfide ion required to just initiate precipitation is M. 2.Solid nickel(II) nitrate is slowly added to 175 mL of a 0.0655 M sodium sulfide solution. The concentration of nickel ion required to just initiate precipitation is M. 3.Solid sodium sulfate is slowly added to 175 mL of a 0.0515 M lead nitrate solution. The concentration of sulfate ion required to just initiate precipitation...
Solid zinc acetate is slowly added to 75.0 mL of a 0.0343 M ammonium carbonate solution. The concentration of zinc ion required to just initiate precipitation is ? M