double displacement reactions sch3u. double displacement reaction the positive ions of two ionic...

Double Displacement Reactions

SCH3U

Double Displacement Reaction The positive ions of two ionic compounds switch

places and make two new ionic compounds.

BaCl2 (aq) + Na2SO4 (aq) 2 NaCl (aq) + BaSO4 (s)

+ AX BY AY + BX

+ +

Types of Double Displacement Rxns A reaction that forms a solid

AgNO3 (aq) + NaCl (aq) AgCl (s) + NaNO3 (aq)

How do know if a precipitate will be formed? Solubility chart

Types of Double Displacement Rxns A reaction that forms a gas Many of these reactions are two reactions in rapid

succession. (Vinegar and baking soda volcano) Acetic acid + sodium hydrogen carbonate sodium

acetate + carbonic acid (hydrogen carbonate) CH3COOH (aq) + NaHCO3 (s) NaCH3COO (aq) +

H2CO3 (aq) Decomposition: H2CO3 (aq) H2O (l) + CO2 (g)

Acid + compound containing carbonate ion ionic compound + water + carbon dioxide

Types of Double Displacement Rxns A reaction that forms water (neutralization)

Acid + base water + ionic compound Sulfuric acid + calcium hydroxide calcium

sulfate + water H2SO4 (aq) + Ca(OH)2 (aq) CaSO4 (aq) + 2 H2O (l)

If one reactant… And the other reactant…

Then the product includes:

Is an aqueous salt Is an aqueous salt A precipitate

Is an acid Has carbonate ions

Water and carbon dioxide

Is an acid Has hydroxide ions water

Any other pairs, see solubility table