CaSo3 + __________ ======> CaCl2 + _______(A)(испаряется) + __________
_______(А) + О2 ======V2O5===> _________
CaSO3 + 2HCl = CaCl2 + SO2 + H2O
SO2 + O2 = SO3 ( t, V2O5)
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CaSO3 + 2HCl = CaCl2 + SO2 + H2O
SO2 + O2 = SO3 ( t, V2O5)