Page 71 - Statistics presented by Dr. Sara Ismail Aborass

9/8/2023

• Properties of washing liquid:
• 1- Should not dissolve the ppt or hydrolyse it
• 2- Should not peptize the ppt
• 3- Should not cause further precipitation of

impurities

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Examples

- The washing liquid for AgCl ppt in Volhard’s
method is acidulated water with HNO3
- The washing liquid for ammonium oxalate ppt is
5% aqueous ammonia

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