Reaction ClassesGas Formation Reactions

• Acids release H2S, CO2, SO2 from salts of the oxoanions S2-, CO32-, HCO3-, SO32-

• FeS(s) + 2HCl(aq) ? FeCl2(aq) + H2S(g)

• CaCO3(s) + 2HCl(aq) ? CaCl2(aq) + H2O(l) + CO2(g)

• Na2SO3(aq) + 2HCl(aq) ? 2NaCl(aq) + H2O(l) + SO2(g)

• Draw a molecular diagram of this type of reaction

04m14vd1

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