Oxidation-Reduction Reactions and Electrochemistry
是非題
( ) PbO(s) + CO(g) → Pb(s) + CO2(g)
The oxidizing agent is PbO.
( ) Reduction is defined as a loss of electrons.
( ) Chromium and tin are often used to plate steel because they oxidized to
form a durable, effective oxide coating.
( ) The electrode where oxidation occurs is called the cathode
( ) Nickel-cadmium battery can be recharged.
( ) In the lead storage battery, the oxidizing agent is PbO2.
(1)
(2)
(3)
(4)
(5)
(6)
1
2
3
4
5
6
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☓
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☓
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○
7
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選擇題
(1)
( )
(2)
( )
(3)
(4)
(5)
( )
( )
( )
The process of
involves forcing a current through a cell to
produce a chemical change that would not otherwise occur.
(A) discharge (B) electrolysis (C) oxidation (D) reduction
What is the oxidation state of carbon in CO2? (A) 1 (B) 2 (C) 3 (D) 4
What is the oxidation state of nitrogen in NO3-? (A) -1 (B) 1 (C) 3 (D) 5
What is the oxidation state of oxygen in H2O2? (A) -2 (B) -1 (C) 1 (D) 2
What is the oxidation state of carbon in C2H6? (A) -3 (B) 0 (C) 3 (D)
none of these
1
2
3
4
5
B
D
D
B
A
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問答、計算題
(1)
(2)
Balance the equation for the reaction in acidic solution.
MnO4-(aq) + Fe2+(aq) → Fe3+(aq) + Mn2+(aq)
Balance the reduction half-reaction in acidic solution:
(a) PbO2(s) → Pb2+(aq)
(b) HNO3(aq) → NO(g)
(1)
MnO4-(aq) + 5Fe2+(aq) + 8H+ → 5Fe3+(aq) + Mn2+(aq) + 4H2O(l)
(2)
(a) 4H+(aq) + PbO2(s) + 2e- → Pb2+(aq) + 2H2O(l)
15
16
(b) 3H+(aq) + HNO3(aq) + 3e- → NO(g) + 2H2O(l)