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

A precipitate forms when aqueous solutions of iron(II) chloride and sodium hydroxide are combined. 

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

A precipitate forms when aqueous solutions of copper(II) nitrate and sodium carbonate are combined. 

3. Consider the reaction when aqueous solutions of potassium hydroxide and iron(II) bromide are combined. The net ionic equation for this reaction is:

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