Synthesis. One way to make potassium chloride is to react the hydroxide with hydrochloric acid. The resulting salt can then be purified by recrystallization. In practice however, potassium chloride is available in massive amounts in nature and can simply be recrystallized to recover it.ynthesis. One way to make potassium chloride is to react the hydroxide with hydrochloric acid. The resulting salt can then be purified by recrystallization. In practice however, potassium chloride is available in massive amounts in nature and can simply be recrystallized to recover it.
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