What is the effect on the emf of the cell shown in Figure 20.9, which has the overall reaction Zn(s) + 2H+(aq)→Zn2+(aq) + H2(g), for each of the following changes?(a) The pressure of the H2 gas is increased in the cathode halfcell.(b) Zinc nitrate is added to the anode half-cell. (c) Sodium hydroxide is added to the cathode half-cell, decreasing [H+]. (d) The surface area of the anode is doubled.Zn (s) + 2H+ (aq) → Zn2+ (aq) + H2(g);

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peacharmadillo731Lv1

21 Apr 2020

What is the effect on the emf of the cell shown in Figure 20.9, which has the overall reaction Zn(s) + 2H⁺(aq)→Zn²⁺(aq) + H₂(g), for each of the following changes?
(a) The pressure of the H₂ gas is increased in the cathode halfcell.
(b) Zinc nitrate is added to the anode half-cell. (c) Sodium hydroxide is added to the cathode half-cell, decreasing [H⁺]. (d) The surface area of the anode is doubled.
Zn (s) + 2H⁺ (aq) → Zn²⁺ (aq) + H₂(g);

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Elin HesselLv2

25 May 2020

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1) A constant current of 0.800 A is run through the electrolytic cell in order to produce oxygen (gas) at the anode:

2 H₂O â O₂(g) + 4 e^- + 4 H⁺

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Zn(s) Ç Zn²⁺(aq) (0.0420 M) ÇÇ Tl³⁺(aq) (9.06Ã10^-2 M), Tl⁺(aq) (0.0400 M) Ç Pt(s).

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