For the reaction Ni2+(aq) + 2Fe2+(aq) ? Ni(s) + 2Fe3+(aq), the standard cell potential E°cell is
C)/-1.78 V )-0.89 V Given that the is the standard E) None of these. 24,Forthe reaction N产(aq) + 2Fe2+(aq) → Ni(s) A) 0.80 V 2Fe3 (aq), the standard cell potential cell is oneduo -0.30 v B 0.30 V 9.チ A) +2.81 V +0.52 V D-1.02 V. D) -0.80 V E) 0.43 V 29. Which one E) -2.81 V. spontaneous 25. Consider an electrochemical cell based on the C? following cell diagram:
For the cell Ni(s) Ni2+(aq) || Ag+(aq) Ag(s), the standard cell potential is 1.03 V. A cell using these reagents was made, and the observed potential was 0.80 V at 25°C. What is a possible explanation for the observed voltage? The volume of the Agt solution was larger than the volume of the Ni2+ solution. The Agt concentration was larger than the Ni2+ concentration. The Ag electrode was twice as large as the Ni electrode. The Ni2+ concentration was larger...
6. Consider a voltaic cell based on the following cell reaction: Ni(s) + At2(s) ? Ni2+(aq) + 2At– (aq) Given that the standard cell emf is 0.55 V, what is the standard reduction potential for astatine? [E°(Ni2+/Ni) = –0.25 V]
Calculate the standard cell potential (∆Eo) for the
galvanic cell:
Ni (s) 1 Ni2+ (aq) II Ag+ (aq) 1 Ag (5) Given: E Half Reaction Ag+ (aq) +e- → Ag (s) Ni2+ (aq) + 2e- → Ni (s) 0.79 Volts -0.23 Volts
A voltaic cell utilizes the following reaction: 2Fe3+(aq)+H2(g)→2Fe2+(aq)+2H+(aq). emf of this cell under standard conditions E∘ = 0.771 V What is the emf for this cell when [Fe3+]= 3.70 M , PH2= 0.95 atm , [Fe2+]= 1.0×10−3 M , and the pH in both compartments is 3.95? Express your answer using two significant figures.
Question 4 A galvanic cell uses the reaction: 2Ag+(aq) + Ni(s) --> 2Ag(s) + Ni2+(aq) a) calculate the Standard Cell Potential (Ecell) of this galvanic cell and b) which metal is the cathode? a) 1.03 V; b) nickel a) 1.03 V; b) silver oooo a) 0.57 V; b) nickel a) 0.57V; b) silver
17. Write the overall cell reaction for the following voltaic cell. Cd(s)|Cd2+(aq)||Ni2+ (aq)|Ni(s) 18. Calculate the standard cell potential of the following cell at 25°C. Cd(s) Cd2+ (aq)||Ni2+ (aq) Ni(s)
In the following cell, A is a standard Ni2+1 Ni electrode connected to a standard hydrogen electrode. For this cell the voltmeter reading is -0.23 V. What is the chemical equation for the cell reaction? Given: Standard reduction potential of the H+/H2 and Ni2+/Ni couples are 0.00 and -0.23 V, respectively. voltmeter saltbridge PLS) PAH2 (g) O Ni(s) + 2H+(aq) --> Ni2+(aq) + H2(g) O Ni2+(aq) + H2(g) --> Ni(s) + 2H+(aq)
A voltaic cell is constructed from an Ni2+ (aq) -Ni(s) half-cell and an Ag+ (aq)- Ag(s) half-cell. The initial concentration of Ni2+ (aq) in the Ni2+ - Ni half-cell is [Ni2+1 = 1.80x10-2 M. The initial cell voltage is +1.13 V. Part A By using data in Table 20.1 in the textbook, calculate the standard emf of this voltaic cell. V AEQ ? E V Submit Request Answer Part B. Will the concentration of Ni2+ (aq) increase or decrease as...
Calculate the E°cell for the following reaction: Cu2+ (aq) + Ni (s) → Cu (s) + Ni2+ (aq) A) (-0.59 ± 0.01) V B) (-0.09 ± 0.01) V C) (0.59 ± 0.01) V D) (0.09 ± 0.01) V --------------------------------------------------------------------------------------------------------- What is the proper line notation for the following reaction? Cu (s) + 2Ag+ (aq) → Cu2+ (aq) + 2Ag (s) A) Cu2+ | Cu || Ag | Ag+ B) Ag+ | Ag || Cu | Cu2+ C) Cu |...