1-Write balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coefficients.

A precipitate forms when aqueous solutions of nickel(II) iodide and potassium carbonate are combined. 

Use the pull-down boxes to include states such as (s) or (aq).

2. Write balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coefficients.

A precipitate forms when aqueous solutions of zinc bromide and potassium hydroxide are combined. 

3. Write 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 magnesium chloride are combined.