When the following redox reaction is balanced in acidic solution, which of the a

Question

When the following redox reaction is balanced in acidic solution, which of the answer choices represent the correct coefficients for As2O3 and NO3 -?

As2O3 (aq) + NO3 - (aq) ? H3AsO4 (aq) + NO (g)

You do not need to balance the entire equation. Just consider the number of electrons transfered by looking at the change in oxidation numbers for the As and the N. The total number of electrons lost must equal the total number of electrons gained.

You do not need to balance the entire equation. Just consider the number of electrons transfered by looking at the change in oxidation numbers for the As and the N. The total number of electrons lost must equal the total number of electrons gained.

Only got one shot at it please explain why with the correct answer!

Explanation / Answer

As2O3(aq) + NO3-(aq) ? H3AsO4(aq) + NO (g)

The correct answer is :3 As2O3, 4 NO3-

As2O3(aq) - 4e- -------->2H3AsO4(aq) x 3 oxidation half

NO3-(aq) + 3 e- ----------> NO (g) x 4 reduction half.

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