Question
Name two metals which form amphoteric oxides.
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$\text{Al}_2\text{(SO}_4)_3\ +\ \text{NaOH}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{Al(OH)}_3\ +\ \text{Na}_2\text{SO}_4$
$\text{NaCl}+\text{Na}_3+\text{H}_2\text{O}+\text{CO}_2\rightarrow$