Question 1 0/1pts The standard reduction potential of a chromium electrode is -0

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Question 1 0/1pts The standard reduction potential of a chromium electrode is -0.74 volits when chromium is reduced from chromium (II). The standard potential of the cell where chromium is axidized and cerium (TV is reduced to cerium (I) is +2.35 For each half reaction how many electrons are transferred? cerium half reaction 3 chromium half reaction Incorrect Question 2 0/ 1pts The standard reduction potential of a chromium electrode is 0.74 volts when chromium is reduced from chromium Ull)1 The standard potential of the cel where chromium is axidized and cerium tMI is reduced to cerium IIIl is +.35 V. Write the balanced equation between chromium and cerium. Match the species to its coefficient in the balanced reaction. Cerium UVM Chromium solid

Explanation / Answer

r^3+ (aq) + 3e^- ---------> Cr(s)      E0 = -0.74v
Ce^4+ (aq) + e^- ----------> Ce^3+(aq) E0 = +2.35v

cerium half reaction 1
chromium half reaction 3

question 2

Cr^3+ (aq) + 3e^- ---------> Cr(s)      E0 = -0.74v
Ce^4+ (aq) + e^- ----------> Ce^3+(aq) E0 = +2.35v

Cr(s) ----------->Cr^3+ (aq) + 3e^-      E0 = 0.74v
3Ce^4+ (aq) + 3e^- ------> 3Ce^3+ (aq)   E0 = 2.35v
--------------------------------------------------------
Cr(s) + 3Ce^4+ (aq) ------> Cr^3+ (aq) + 3ce^3+ (aq)    E0cell = 3.09v

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