Balance the given redox reactions using the oxidation number method  a.H2S(aq) + HNO3 (aq) -> S(s) + NO (aq) + H2O (l) b. H2 SO4 (aq) + HBr (aq) -> SO2 (aq) + Br2 (g) + H2O (l) c. H2 SO4 (aq) + HI (aq) -> H2S (aq) + I2 (g) + H2O (l)

Chemistry & Chemical Reactivity
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Chapter3: Chemical Reactions
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Problem 63PS: Balance each of the following equations, and classify them as precipitation, acid-base, gas-forming,...
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Balance the given redox reactions using the oxidation number method 
a.H2S(aq) + HNO3 (aq) -> S(s) + NO (aq) + H2O (l)
b. H2 SO4 (aq) + HBr (aq) -> SO2 (aq) + Br2 (g) + H2O (l)
c. H2 SO4 (aq) + HI (aq) -> H2S (aq) + I2 (g) + H2O (l)

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