Calculate the reduction potential of the H+/H2 half reaction at
25 °C at pH 3.00
and PH2 = 0.20 bar. Assuming E° is unchanged, whatwould the
potential be at 20 °C?
Calculate the reduction potential of the H+/H2 half reaction at 25 °C at pH 3.00 and...
Calculate the potential of the H+/H2 half-cell when aH = 0.770 and the partial pressure pH2 = 1.13 atm. B) Calculate the pH of this solution. Note: Use as the other electrode of the calomel electrode. [look up parameters of this electrode]
4. The following balanced redox reaction occurs in voltaic cell at 25°C H2 (g) + 2Ag+ (aq) → 2H* (aq) + 2 Ag (s) 2H+ + 2e → H2 (g) EⓇ = 0.00V Ag (aq) + le → Ag(s) E = +0.80V a. Write the two half-reactions (oxidation and reduction) occurring in the cell. Clearly indicate which reaction shows oxidation and which shows reduction. Clearly indicate which reaction occurs at the anode and which reaction occurs at the cathode. (4...
Calculate E for the reduction of H+ to H2 at pH 2.0. (provide answer in V)
If the potential of a Zn-H+ cell (see below) is 0.45 V at 25 C when the [Zn2+] = 1.0M and PH2 = 1 atm, what is the pH of the cathode solution? Zn(s)|Zn2+(aq)|| H+(aq)|H2 (g)|Pt
The cell potential of this cell is observed to be
0.445v Calculate the pH for the H+/H2 half cell
please explain the use of the half reaction in terms of the signs,
positive and negative in the equations.
The cell potential of this electrochemical cell is observed to be 0.445 v. Calculate the pH in for the H+H2 half cell Zn (s)| Zn2+ (2.5 M) || H*(??)[H2 (g. 4.5 atm)|Pt(s)
A galvanic cell was constructed with a Zn/Zn2+ half cell and an H2/H+ half cell(standard hydrogen electrode, SHE). Calculate Ecell under the following conditions: [Zn2+] = 0.01 M, [H+] = 2.5 M, and PH2 = 0.30 atm at 25°C?
What is the reduction potential for the half-reaction AP(aq) + 36 Al(s) at 25°C if [A13+1 -0.18 M and E--1.66 V? a) -1.84 V Ob) -1.67 V OC) -1.65 V od) -1.72 V e) -1.66 V
A chemist designs a galvanic cell that uses these two half-reactions: standard reduction potential half-reaction Br2)+2e 2 Br (aq) 1.065 V red E 2 H,00+2е H2(9)+2ОН (ад) 0.83 V 'red Answer the following questions about this cell. Write a balanced equation for the half-reaction that happens at the cathode Write a balanced equation for the half-reaction that happens at the anode Write a balanced equation for the overall reaction that powers the cell. Be sure the reaction is spontaneous as...
Selective Reduction The standard reduction potential for the half-reaction: Sn4+ + 2e - Sn2+ is +0.15 V. Consider data from the table of standard reduction potentials for common half-reactions, in your text. For a galvanic cell under standard conditions, which of the following anodic half reactions would produce, at the cathode a spontaneous reduction of Sn4+ to Sn2+ but not Sn2+ to Sn. no yes yes yes yes yes Fe — Fe2+ + 2e- Sn2+ Sn4+ + 2e- Sn Sn2+...
The voltage of the following cell at 25 ̊C is + 0.65V. The standard reduction potential for Zn is -0.76 V. Zn | Zn2+ (0.60M) || H+ (aq.), H2 (g,1.0 atm) | Pt What is the pH of the solution at the cathode?