Asked by ny
Which statement is true of the following reaction?
Upper H subscript 2 plus upper O subscript 2 right arrow upper 2 H superscript plus, plus upper O superscript 2 minus.
It is balanced for oxidation state and for number of atoms.
It is not balanced for oxidation state or for number of atoms.
It is not balanced for oxidation state but is balanced for number of atoms.
It is balanced for oxidation state but is not balanced for number of atoms.
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Answer: It is balanced for oxidation state but is not balanced for number of atoms.
Reason: Left: H2 (2 H) and O2 (2 O). Right: 2 H+ (2 H) and only one O2− (1 O) — oxygen atoms are not balanced (2 vs. 1). Oxidation numbers: H goes 0 → +1 (total +2), O goes 0 → −2 (total −2), so the net change in oxidation state (electrons) is zero — oxidation states are balanced.
Reason: Left: H2 (2 H) and O2 (2 O). Right: 2 H+ (2 H) and only one O2− (1 O) — oxygen atoms are not balanced (2 vs. 1). Oxidation numbers: H goes 0 → +1 (total +2), O goes 0 → −2 (total −2), so the net change in oxidation state (electrons) is zero — oxidation states are balanced.
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