Chemical Reactions Double Replacement Reactions. “Square Dance/Swingers/Wife Swap” – The anions and cations switch. Reactants =2 compounds (aq)

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Presentation transcript:

Chemical Reactions Double Replacement Reactions

“Square Dance/Swingers/Wife Swap” – The anions and cations switch. Reactants =2 compounds (aq)

Double Replacement Reactions Products = 1 compound (aq)) AND: 1 compound (aq) (N.R) or 1 compound (s) (ppt) or 1 compound (g) (Bubbles) or 1 compound (l) (H 2 O)

Double Replacement Reactions AB + CD AD + CB Because……the cations are A and C The anions are B and D And the cation ALWAYS goes first

Double Replacement Reactions First you need to determine which product is aqueous. Then you need to determine the state of matter for the other compound.

Double Replacement Reactions Solubility Chart – Memorize It

Double Replacement Reactions Soluble – This means that the compound dissolves. The state of matter is (aq) Insoluble – This means that the compound does not dissolve. The state of matter is (s).

Double Replacement Reaction MgCl 2(aq) + 2AgNO 3(aq) Mg(NO 3 ) 2(aq) + 2AgCl (s) Ionic: Break (aq) into ions Mg Cl - + 2Ag + +2NO 3 - Mg NO AgCl Net Ionic: Drop the spectator ions 2Cl - + 2Ag + 2AgCl

Double Replacement Reaction 3FeCl 2(aq) + 2Na 3 PO 4(aq) Fe 3 (PO 4 ) 2(s) + 6NaCl (aq) Ionic: 3Fe Cl - + 6Na + + 2PO 4 3- Fe 3 (PO 4 ) 2 + 6Na + + 6Cl - Net Ionic: 3Fe PO 4 3- Fe 3 (PO 4 ) 2