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Which atom has a change in oxidation number of -3 in the following redox reaction?

K2Cr2O7 + H2O + S -> KOH + Cr2O3 +SO2


a) Cr
b) S
c) K
d) O

2007-06-07 05:29:31 · 2 answers · asked by Steph 2 in Science & Mathematics ➔ Chemistry

2 answers

a) Cr

2007-06-07 05:48:59 · answer #1 · answered by ag_iitkgp 7 · 3⤊ 0⤋

Indeed chromium.

2007-06-07 05:52:49 · answer #2 · answered by Kyle M 2 · 2⤊ 0⤋

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