With respect to the following reaction, which is the correct statement? #2HNO_3(aq) + 3H_2S(aq) rarr 3S(s)+2NO(g) +4H_2O#; a. both sulfur and nitrogen are reduced; b. nitrogen is reduced and sulfur is oxidized; c. oxygen is oxidized; d. this is not redox.

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Answer 1 · 2016-09-01T17:21:10

#b.#

#2HNO_3 + 3H_2S rarr 3Sdarr +2NOuarr +4H_2O#

Can you write the redox half equations?

Nitrate ion, #N(+V)#, is reduced to nitrous oxide, #N(+II)#.

#HNO_3 + 3H^(+) +3e^(-) rarr NO + 2H_2O#

Try to represent the sulfur oxidation.

This is (I take it) a first year chemistry problem? Surely it's at least A level?