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completeaza si si egaleaza ecuatiile reactiilor :a)NaOH+?=Na2SO4+? b)Cu(OH)2+?=CuSO4+? c)+CuSO4=Cu(OH)2+? c)?+CO2=Na2CO3+/

Răspuns :

4NaOH+2HSO4=2Na2SO4+3H2↑
Cu(OH)2+H2SO4=CuSO4+H2O
3Na(OH)2+3CO2=2NaCO3+H2↑