1.

The inorganic cation in the question above could be

Answer»

nickel
ferric
silver
ALUMINIUM

Solution :This PRECIPITATE REACTS with acid or base and therefore , is AMPHOTERIC . It could be aluminium hydroxide.
`Al(OH)_3 + 3H^(+)to Al^( + ++) + 3H_2O`
`Al(OH)_3 + OH^(-) to Al(OH)_4`


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