?Indicate whether the following balanced equations involve oxidation-reduction. If they do, identify the elements that undergo changes in oxidation num
Chapter 20, Problem 20.2(choose chapter or problem)
Indicate whether the following balanced equations involve oxidation-reduction. If they do, identify the elements that undergo changes in oxidation number.
(a) \(2 \mathrm{AgNO}_{3}(a q)+\mathrm{CoCl}_{2}(a q) \longrightarrow 2 \mathrm{AgCl}(s)+ \mathrm{Co}\left(\mathrm{NO}_{3}\right)_{2}(a q)\)
(b) \(2 \mathrm{PbO}_{2}(s) \longrightarrow 2 \mathrm{PbO}(s)+\mathrm{O}_{2}(g)\)
(c) \(2 \mathrm{H}_{2} \mathrm{SO}_{4}(a q)+2 \mathrm{NaBr}(s) \longrightarrow \mathrm{Br}_{2}(l)+\mathrm{SO}_{2}(g)+ \mathrm{Na}_{2} \mathrm{SO}_{4}(a q)+2 \mathrm{H}_{2} \mathrm{O}(l)\)
Text Transcription:
2 AgNO3(aq) + CoCl2(aq) \longrightarrow 2 AgCl(s) + Co1NO322(aq)
2 PbO2(s) \longrightarrow 2 PbO1s2 + O21g2
2 H2SO4(aq) + 2 NaBr(s) \longrightarrow Br2(l) + SO2(g) + Na2SO4(aq) + 2 H2O(l)
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