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Precipitation Reactions

Procedure

1. 0.2M ferric nitrate is added dropwise to 1M sodium hydroxide. A red precipitate appears.

2. 0.1M cobalt chloride is added dropwise to saturated calcium hydroxide. A blue precipitate appears.

3. 0.2M potassium chromate is added dropwise to 0.05M lead acetate. A yellow precipitate appears.

Reactions

Fe(NO₃)₃(aq) + 3NaOH (aq) --> Fe(OH)₃(s) + 3NaNO₃(aq)

CoCl₂(aq) + Ca(OH)₂(aq) --> Co(OH)₂(s) + CaCl₂(aq)

K₂CrO₄(aq) + Pb(O₂CCH₃)₂(aq) --> PbCrO₄(s) + 2KO₂CCH₃(aq)