A. Write a balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coefficients. A precipitate forms when aqueous solutions of lead(II) nitrate and potassium iodide are combined.

B. Write a balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coefficients.
A precipitate forms when aqueous solutions of copper(II) sulfate and potassium hydroxide are combined.

C. Write a balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coefficients.
A precipitate forms when aqueous solutions of lead(II) nitrate and potassium phosphate are combined.
D. Consider the reaction when aqueous solutions of ammonium sulfide and iron(II) sulfate are combined. The net ionic equation for this reaction is: