Predicting the Products for Double Replacement Reactions

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Presentation transcript:

Predicting the Products for Double Replacement Reactions

Double Replacement Reactions The cations and anions of two different compounds switch places. The reactants are composed of 2 different compounds. AB + CD  AD + CB

Steps to Predict the Products: Identify the cation in the first compound and the anion in the second compound. Ex: NaCl + LiBr  Write them together on the right side of the equation. Remember: the cation goes first! Ex: NaCl + LiBr  Find the charges of the two ions. Balance the charges and write the formula. Ex: NaCl + LiBr 

Steps (cont.): Identify the cation in the second compound and the anion in the first compound. Ex: NaCl + LiBr  Write them together on the right side of the equation. Remember: the cation goes frist! Ex: NaCl + LiBr  Find the charges of the two ions. Balance the charges and write the formula. Ex: NaCl + LiBr  Balance the equation.

Examples CaCO3 + HCl  BaCl2 + Na2SO4 