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This document describes a method for determining the purity of sodium hydroxide by titrating it with hydrochloric acid. It involves: 1) Precipitating sodium carbonate impurities as barium carbonate by adding barium chloride before titration. 2) Titrating most of the sodium hydroxide with concentrated hydrochloric acid, followed by titrating any residual sodium hydroxide with dilute hydrochloric acid for better accuracy. 3) Continuously titrating the barium carbonate formed with dilute hydrochloric acid

Author

Sarang

Language

EN