Здійснити перетворення:

а) Al → AlCl 3 → Al(NO 3 ) 3 → Al(OH) 3 → Al 2 O 3 → K 3 AlO 3 ;
б) KClO 3 → O 2 → SO 2 → SO 3 → H 2 SO 4  BaSO 4 .
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