To determine which element is reduced or oxidized, we must identify the changes in their oxidation states.
Compare the oxidation number of the element on the reactant side and on the product side.
Remember the mnemonics:
Indicate whether the following balanced equations involve oxidation-reduction. If they do, identify the elements that undergo changes in oxidation number.
(a)3SO2(g) + 2HNO3(aq) + 2H2O(l)→3H2SO4(aq) + 2NO(g)
(b) 2H2SO4(aq) + 2NaBr(s)→Br2(l) + SO2(g) + Na2SO4(aq) + 2H2O(l)
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Redox Reactions concept. If you need more Redox Reactions practice, you can also practice Redox Reactions practice problems.