When the oxidation-reduction reaction was balanced in acidic solution. If the [H2O2] = 0.352 M, partial pressure of O2 is 2.21 atm, [K2Cr207] = 0.642 M, the [Cr3*] = 0.963 M, and the pH was measured to be 8.42 then what is the cell potential at 25°C? O2(9) + Cr** (ag) → H2O2(ag) + Cr20,2 (ag) -2.51 O 2.70 -1.74 1.90 O 2.33 3.38 -3.12 O 2.92 O -3.51 -2.14 O O O O

Qq.49. Subject  :- Chemistry

When the oxidation-reduction reaction was balanced in acidic solution. If the [H2O2] = 0.352 M, partial pressure of Oz is 2.21 atm, [K2Cr2O7) = 0.642 M, the [Cr3+] = 0.963 M, and the pH was measured to be 8.42 then what is the cell potential at 25°C? O2(g) + Cr3+ *(aq) → H202(aq) + Cr20-2" (aq)

Calculate the EMF of the following electrochemical cell: Pt | VO2+(0.25 M), V3+(0.10 M), H+ (0.001 M) || TI3+ (0.10 M), TI+(0.05 M), | Pt Indicate whether the cell is galvanic or electrolytic. Evo2+/v3+ = 0.361 V, ET³+/T+ = 1.25 V   Ans: 1.23 V, galvanic

9) At 25°C, what is the potential and the cell reaction for the following cell: Ni | Ni2+ (aq, 0010 M) || Cl(aq, 0.20M) | Cl2 (g, 1 atm) | Pt? What is the Keg at 298K?

A hydrogen electrode is immersed in a 2.2 M solution of acetic acid at 25 °C. This electrode is connected to another consisting of an iron nail dipping into 2.2 M FeCl2. What will be the measured potential of this cellI? Assume PH2 = 1.00 atm. Erell = i V

For the galvanic cell at 298 K 2X(s) + 3Y2*(aq) –→ 2x3*(aq) + 3Y(s) E° cell = 0.39 V What is the measured cell potential (Ecell) when [Y2*] = 1.0 M and [X3+] = 0.01 M? Periodic Table and Datasheet O 0.39 V O 0.35 V O 0.43 V O 0.51 V

A galvanic cell was constructed with a nickel electrode that was dipped into 1.1 M NiSO4 solution and a chromium electrode that was immersed into a solution containing Cr3+ at an unknown concentration. The potential of the cell was measured to be 0.557 V, with the chromium serving as the anode. The standard cell potential for this system was determined to be 0.487 V. What was the concentration of Cr3+ in the solution of unknown concentration?

A galvanic cell is constructed in which the overall reac- tion is Cr,O} (aq) + 14 H¿O*(aq) + 6 I (aq) → 2 Cr* (aq) 1 3 I,(s) | 21 H,0(€) (a) Calculate AE° for this cell. (b) At pH 0, with [C»O3¯] = 1.5 M and [I-] = 0.40 M, the cell potential is found to equal 0.87 V. Calculate the concentration of Cr³*(aq) in the cell.

At a temperature of 25 ° C the galvanic element Pt | MnO4- 0,10M, Mn2 + 0,1M, pH = 1 | Ag + 0.0001M | Ag has the electromotive force 0,80V. Calculate the standard electrode potential of Ag + if E ° (MnO4 -, H + | Mn2 +) = 1.50V