For a voltaic cell based on the reaction below, which statement
is correct?
Zn(s)+2H+(aq)→Zn2+(aq)+H2(g)
Zn2+(aq) is oxidized at the anode. | |
H+(aq) is reduced at the cathode. | |
Zn2+(aq) is reduced at the anode. | |
H2(g) is the oxidizing agent. |
For a voltaic cell based on the reaction below, which statement is correct? Zn(s)+2H+(aq)→Zn2+(aq)+H2(g) Zn2+(aq) is...
Consider a voltaic cell where the anode half-reaction is Zn(s) → Zn2+(aq) + 2 e− and the cathode half-reaction is Sn2+(aq) + 2 e– → Sn(s). What is the concentration of Sn2+ if Zn2+ is 2.5 × 10−3 M and the cell emf is 0.660 V? The standard reduction potentials are given below Zn+2(aq) + 2 e− → Zn(s) E∘red == −0.76 V Sn2+(aq) + 2 e– → Sn(s) E∘red −0.136 V
1a) In the following spontaneous voltaic cell, which of the following statements are TRUE? Select as many answers as are correct however points will be deducted for incorrect guesses. Zn(s)|Zn2+(aq)||H+(aq)|H2(g)|Pt(s) Select one or more: Zn/Zn2+ is the anode Eºcell is positive H+/H2 is the cathode Zn/Zn2+ is the cathode H+/H2 is the anode Eºcell is negative
Write the cell notation for an electrochemical cell consisting of an anode where Zn (s) is oxidized to Zn2+ (aq) and a cathode where Co+ (aq) is reduced to Co (s). Assume all aqueous solutions have a concentration of 1 moVL Write the cell notation for an electrochemical cell consisting of an anode where Zn (s) is oxidized to Zn2+ (aq) and a cathode where Co+ (aq) is reduced to Co (s). Assume all aqueous solutions have a concentration of...
Consider a voltaic cell al 25 degree Celsius in which the reaction is: Zn (s) + 2H+ (aq) → Zn2+ (aq) + H2(g) It is found that the voltage (think Ecell) is +0.560 V when [Zn2+1 -0.85 M and PH2 = = 0.988 atm. What is the pH in the H2-H half-cell?
Separate galvanic cells are made from the following half-cells: cell 1: H+(aq)/H2(g) and Pb2+(aq)/Pb(s) cell 2: Fe2+(aq)/Fe(s) and Zn2+(aq)/Zn(s) Which of the following is correct for the working cells? Standard reduction potentials, 298 K, Aqueous Solution (pH = 0): Cl2(g) + 2e --> 2C1-(aq); E° = +1.36 V Fe3+(aq) + e --> Fe2+(aq); E° = +0.77 V Cu2+(aq) + 2e --> Cu(s); E° = +0.34 V 2H+(aq) + 2e --> H2(g); E° = 0.00 V Pb2+(aq) + 2e --> Pb(s);...
Folder# Grade 1. In the voltaic cell shown below, the electrons flow from Zn(s)|Zn²+ (aq)|| Cu" (aq)|Cu(s) Cu(s) (a) Cu(s) ® Zn(s) (b) Zn(s) (c) Zn(s) ® cu (d) Cut ® Zn(s) 2. Which of the following statements about the voltaic cell shown below is correct? Zn(s)[Zn** (aq)|| Cu** (aq) Cu(s) (a) Oxidation takes place at the cathode and reduction takes place at the anode. (b) Oxidation takes place at both the cathode and the anode. (c) Reduction takes place...
A Cu-Zn voltaic cell based on the reaction in the equation given below. Zn(s)+Cu2+(aq)àZn2+(aq)+Cu(s) Which metal is oxidized in this voltaic cell? A. Copper B. Zinc
Part A Consider a voltaic cell that is set up as follows: Anode contains an Zn(s) electrode and 1M Zn2+(aq) Cathode contains a Pt(s) electrode and 1M MnO4–(aq),Mn2+(aq), and H+(aq) Which of the following statements match the cathode? Select all that apply. Group of answer choices The electrode increases in mass Oxidation occurs at this half-cell Electrons enter the half-cell The electrode is inactive Cations from the salt-bridge move to this half-cell The electrode is negative Part B Which of...
Question 1 1 pts For the cell: Zn(s) + 2H+ (aq) + Zn2+(aq) + H2 (g) If [Zn2+) = 1 M, PH2 = 1 atm, and E = 0.549 V what is pH? Question 2 1 pts Calculate the voltage for the following cell at 25° ZnZn+2 ( 2.832 M) || Cd2+ (0.027 M)| Cd
What is the effect on the emf of the cell shown in Figure 20.9, which has the overall reaction Zn(s)+2H+(aq)Zn(s) +2 H+(aq) −→−Zn2+(aq)+H2(g),→ Zn2+(aq) + H2(g), for each of the following changes? The pressure of the H2H2 gas is increased in the cathode half-cell. Zinc nitrate is added to the anode half-cell. Sodium hydroxide is added to the cathode half-cell, decreasing [H+].[H+]. The surface area of the anode is doubled. Can someone please explain why b is emf decreases? Why...