What do you observe when freshly precipitated aluminium hydroxide reacts with caustic soda solution? Give a balanced equation.

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Solution

When freshly precipitated aluminium hydroxide reacts with caustic soda solution, a white salt of sodium meta aluminate $(N a A l O_{2})$ is obtained.

$A l (O H)_{3} + N a O H \to N a A l O_{2} + 2 H_{2} O$

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