STD Electrode Potential\/Nernst Equation.docx - STD Electrode Potential Measurement of the electricity generated by redox reactions E(V based on 1M for

STD Electrode Potential/Nernst Equation.docx - STD...

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STD Electrode Potential : Measurement of the electricity generated by redox reactions E°(V) based on 1M for solutions and 1 atm for gases > standard reduction potentials Ex. 1. Will Cr 3+ ions oxidize metallic Cu to Cu +2 ions, or will Cu +2 ion oxidize metallic chromium to Cr +3 ? Cu 2+ + 2e - → Cu E°(V)=0.34 3(Cu +2 + 2e - → Cu) 0.34 Cr 3+ + 3e - → Cr E°(V)=-0.73 2(Cr → 3e - + Cr +3 ) 0.73 3Cu +2 + 6e - + 2Cr → 3Cu + 6e - + 2Cr 3+ 1.07V Therefore, Cu 2+ ions oxide Cr → Cr 3+ More neg E, greater ease of oxidation strength as reduction agent 2. In acidic solution, will stannic ions oxidize NO to nitrate ions, or will nitrate ions oxidize
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