б) NaOH+ SO2=Na2SO3 + H2O
NaOH+Cr2O3= 2NaCrO2+ H2O
K2O+ SO2=K2SO3
Cr2O3 + K2O = 2KCrO2
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б) NaOH+ SO2=Na2SO3 + H2O
NaOH+Cr2O3= 2NaCrO2+ H2O
K2O+ SO2=K2SO3
Cr2O3 + K2O = 2KCrO2