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Questions
What do you observe when freshly precipitated aluminium hydroxide reacts with caustic soda solution? Give a balanced equation.
What is observed on the reaction of aluminium hydroxide with caustic soda solution?
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Solution
Adding excess caustic soda solution dissolves the white precipitate to form a clear, colourless solution.
\[\ce{Al(OH)3 + NaOH ->\underset{Sodium aluminate}{NaAlO2} + 2H2O}\]
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