Precipitation reactions

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Edit   Delete - Last Modified By: FBA at 31/05/2016 7:24:58 AM

1. What is a precipitation reaction?

 

2. What evidence of a precipitation reaction might you directly observe?

Edit   Delete - Last Modified By: FBA at 31/05/2016 8:54:38 PM

GENERAL SOLUBILITY RULES (source)

  1. A compound is probably soluble if it contains one of the following cations:
  • Group 1A cation:  Li+, Na+, K+, Rb+, Cs+
  • Ammonium ion:  NH4+
  1. A compound is probably soluble if it contains one of the following anions:
  • Halide:  Cl-, Br-, I - (Except:  Ag+, Hg2+, Pb2+)
  • Nitrate (NO3-) , perchlorate (ClO4-), acetate (CH3CO2- ), sulfate (SO42-)  (Except:  Ba2+, Hg22+, Pb2+ sulfates)

 

Did your experimental results support these?

Edit   Delete - Last Modified By: FBA at 31/05/2016 8:46:01 PM

Record all observations in your results table.

For the reactions that produced a precipitate, have a go at writing a word equation and a chemical equation to reflect what happened.

Edit   Delete - Last Modified By: FBA at 2/06/2016 9:34:14 AM