p-Block elementsHard

Question

Aluminium vessels should not be washed with materials containing washing soda because :

Options

A.washing soda is expensive
B.washing soda is easily decomposed
C.washing soda reacts with aluminium to form soluble aluminate
D.washing soda reacts with aluminium to form insoluble aluminium oxide

Solution

Na2CO3 + H2O → 2NaOH + CO2 ; 4OH- + Al → [Al(OH)4]- (soluble complex)

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