Electrochemistry

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Electrochemistry

Quiz Number: 7 Course Name: Chemistry Course No.132 Quiz N0. : 7 Teacher: Billy K. Cook Teacher's Home Page: http://faculty.icc.cc.il.us/bcook Teacher's Email: Bcook@icc.cc.il.us

No. of Questions= 4

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1. Which of the following is true for a galvanic cell?

        1. The electron flow is from the negative electrode to the positive electrode.

        2. The electron flow is from the anode to the cathode.

        3. The electron flow is from the oxidizing agent to the reducing agent through an external circuit.

a) 1 only

b) 2 only

c) 3 only

d) 1 and 2 only

e) 1, 2, and 3

2. In the voltaic cell which is represented as
Cd | Cd⁺² || (Pt) Fe⁺³ | Fe⁺²

the electron flow will be from:

a) Pt to Cd⁺²

b) Pt to Cd

c) Fe⁺² to Cd⁺²

d) Cd⁺² to Fe⁺²

e) Cd to Fe⁺³

3. How many Faradays are required to convert a mole of NO₃^-1 to NH₄⁺¹?

a) 1

b) 3

c) 4

d) 5

e) 8

4. Calculate the maximum electrical work obtainable when 7.10 g of Cl_2(g) are consumed in the reaction:
Cd_(s) + Cl_2(g)Cd⁺²_(aq) + 2 Cl^-1_(aq).   (E_cell = 1.76 V)

a) -3.40 x 10⁶ J

b) -3.40 x 10⁴ J

c) -1.70 x 10⁴ J

d) -5.10 x 10⁵ J

e) -1.10 x 10⁴ J

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Illinois Central College
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1.	Which of the following is true for a galvanic cell? 1. The electron flow is from the negative electrode to the positive electrode. 2. The electron flow is from the anode to the cathode. 3. The electron flow is from the oxidizing agent to the reducing agent through an external circuit.

	a)	1 only
	b)	2 only
	c)	3 only
	d)	1 and 2 only
	e)	1, 2, and 3


2.	In the voltaic cell which is represented as Cd \| Cd⁺² \|\| (Pt) Fe⁺³ \| Fe⁺² the electron flow will be from:

	a)	Pt to Cd⁺²
	b)	Pt to Cd
	c)	Fe⁺² to Cd⁺²
	d)	Cd⁺² to Fe⁺²
	e)	Cd to Fe⁺³


3.	How many Faradays are required to convert a mole of NO₃^-1 to NH₄⁺¹?

	a)	1
	b)	3
	c)	4
	d)	5
	e)	8


4.	Calculate the maximum electrical work obtainable when 7.10 g of Cl_2(g) are consumed in the reaction: Cd_(s) + Cl_2(g)Cd⁺²_(aq) + 2 Cl^-1_(aq). (E_cell = 1.76 V)

	a)	-3.40 x 10⁶ J
	b)	-3.40 x 10⁴ J
	c)	-1.70 x 10⁴ J
	d)	-5.10 x 10⁵ J
	e)	-1.10 x 10⁴ J