Electrochemistry Worksheet With Answers
ADVERTISEMENT
1
2
3
4
5mcdonald (pam78654) – HW 10: Electrochemistry – laude – (89560)
1
This print-out should have 15 questions.
If the two half reactions below were used to
Multiple-choice questions may continue on
make a battery, what species would be pro-
the next column or page – find all choices
duced at the anode?
before answering.
Half reaction
◦
E
2+
Cu
(aq) + 2 e
→ Cu(s)
+0.34
001
10.0 points
3+
2+
Fe
(aq) + e
→ 2 Fe
(aq)
+0.77
Which of the following is not a correct state-
ment about a popular battery used in our
3+
1. Fe
(aq)
daily lives?
2+
2. Fe
(aq)
1. Lithium ion batteries, which are used in
cell phones, are considered by some to be a
3. Cu(s)
safety risk because of explosion or fire.
2+
4. Cu
(aq) correct
2. Sulfuric acid is the acid most commonly
found in lead acid storage batteries.
Explanation:
A battery must have a negative positive cell
3. Calcium oxide is the base most commonly
potential and therefore the anodic reaction
2+
found in alkaline batteries. correct
must produce Cu
(aq).
4. Nickel cadmium batteries are decreasingly
004
10.0 points
popular because memory effects reduce the
Using the standard potential tables, what is
0
lifetime of the battery.
the largest approximate E
value that can
be achieved when two half cell reactions are
5. “Hybrid” automobiles most often employ
combined to form a battery?
a nickel metal hydride battery as their electri-
cal power source.
1. 3 V
Explanation:
2. 6 V correct
The base most commonly found in alkaline
batteries is MnO
(manganese(II) oxide).
2
6 V
3.
002
10.0 points
3 V
4.
Consider the reaction
Explanation:
2
CrO
+ ClO → CrO
+ Cl
2
4
Using the tables, the largest values of E
◦
in basic aqueous solution. In the balanced sto-
red
are about + 3 V and - 3 V.
ichiometric equation, what is the coefficient of
The species with the positive value would be
Cl ?
reduced, the other would be oxidised so:
◦
= + 3 V - (- 3 V) = + 6 V
E
1. 4
cell
005
10.0 points
2. 2
For an electrolytic cell, which of the follow-
ing must be negative?
3. 3 correct
I) E
o
cell
II) anode
4. 1
III) cathode
Explanation:
1. I, II, III
003
10.0 points
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education