What are the overall cell reaction and the standard cell potential of a galvanic cell employing the following half-reactions? Cr3+ (aq) + 3e Cr(s), E° Cr3+ = -0.74 V; MnO4 (aq) + 8H+ (aq) + 5e O 5Cr(aq) + 3MnO4 (aq) + 24H+ (aq) 3Mn²+ (aq) + 10H₂O(l) + 5Cr³+ (s) Ⓒ5Cr(s) + MnO4 (aq) + 24H+ (aq) = Mn²+ (aq) + 12H₂O(l) + 5Cr³+ (aq) O 3Mn²+ (aq) + 12H₂O(l) +5Cr³+ (aq) = 5Cr(s) + 3MnO4 (aq) + 24H+ (aq) O 5Cr(s) + 3MnO4 (aq) + 24H+ (aq) 3Mn²+ (aq) + 12H₂O(l) + 5Cr³+ (aq) Z Mn²+ (aq) + 4H₂O, EºMnO4- = 1.51 V. What is the standard cell potential of a galvanic cell? Eºcell = i V
What are the overall cell reaction and the standard cell potential of a galvanic cell employing the following half-reactions? Cr3+ (aq) + 3e Cr(s), E° Cr3+ = -0.74 V; MnO4 (aq) + 8H+ (aq) + 5e O 5Cr(aq) + 3MnO4 (aq) + 24H+ (aq) 3Mn²+ (aq) + 10H₂O(l) + 5Cr³+ (s) Ⓒ5Cr(s) + MnO4 (aq) + 24H+ (aq) = Mn²+ (aq) + 12H₂O(l) + 5Cr³+ (aq) O 3Mn²+ (aq) + 12H₂O(l) +5Cr³+ (aq) = 5Cr(s) + 3MnO4 (aq) + 24H+ (aq) O 5Cr(s) + 3MnO4 (aq) + 24H+ (aq) 3Mn²+ (aq) + 12H₂O(l) + 5Cr³+ (aq) Z Mn²+ (aq) + 4H₂O, EºMnO4- = 1.51 V. What is the standard cell potential of a galvanic cell? Eºcell = i V
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Transcribed Image Text:What are the overall cell reaction and the standard cell potential of a galvanic cell employing the following half-reactions?
Cr³+ (aq) + 3e Cr(s), E°Cr³+ = −0.74 V;
MnO4 (aq) + 8H+ (aq) + 5e¯ ⇒ Mn²+(aq) + 4H₂O, EºMnO4¯ = 1.51 V.
O 5Cr(aq) + 3MnO4¯(aq) + 24H*(aq) ≥ 3Mn²+ (aq) + 10H₂O(l) + 5Cr³+(s)
● 5℃r(s) + MnO4¯(aq) + 24H*(aq) ⇒ Mn²+ (aq) + 12H₂O(l) + 5Cr³+ (aq)
3Mn²+ (aq) + 12H₂O(l) + 5Cr³+ (aq) ⇒5Cr(s) + 3MnO4 (aq) + 24H+ (aq)
O 5Cr(s) + 3MnO4¯(aq) + 24H*(aq) ⇒ 3Mn²+ (aq) + 12H₂O(l) + 5Cr³+ (aq)
What is the standard cell potential of a galvanic cell?
E cell
=
V
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