2Сu+O2=2CuO
CuO+H2SO3=CuSO3+H2O
CuSO3+2NaOH=Na2SO3+Cu(OH)2
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2Сu+O2=2CuO
CuO+H2SO3=CuSO3+H2O
CuSO3+2NaOH=Na2SO3+Cu(OH)2