45. The oxidation half-reaction for the standard hydrogen electrode is: a. H 2 (

Question

45. The oxidation half-reaction for the standard hydrogen electrode is:

a. H2 (g) 2H+ (aq) + 2e-

b. 2H+ (aq) + 2OH- (aq) H2O (l)

c. Pt2+(aq) + 2e- à Pt(s)

d. 2H+(aq) + 2e- H2 (g)

e. 2H+ + Cl2 (g) 2HCl (aq)

46. Which of the following half-reactions is involved in the STANDARD HYDROGEN ELECTRODE?

Pt2+(aq) + 2e- à Pt(s)

2H3O+(aq) + 2e- à 2H2O(l) + H2(g)

H2O2(aq) + 2H3O+(aq) + 2e- à 4H2O(l)

O2(g) + 2H2O(l) + 4e- à 4OH-(aq)

None of the above.

47. The standard hydrogen electrode is assigned a potential of:

a. 0.0 V                        b. 1.0 V                                    c. -1.0 V                       d. 0.0 A                                    e. 1.0 A

Explanation / Answer

45) The oxidation half-reaction for the standard hydrogen electrode is:

d. 2H+(aq) + 2e- H2 (g)

46) 2H3O+(aq) + 2e- ----> 2H2O(l) + H2(g)

47) The standard hydrogen electrode is assigned a potential of: 0.0 V

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