After Exam 3

Question 1

What is the oxidation number of bromine in the HBrO molecule?

Answer 1

+1

Question 2

Which of the following statements is true?

Answer 2

A reducing agent gets oxidized as it reacts

Oxidizing agents can convert CO into CO2

Question 3

The balanced half reaction in which dichromate ion (Cr2O7 2-) is reduced to chromium (III) ion (Cr 3+) is a _____ process

Answer 3

Six electron

Question 4

Which transformation could take place at the anode of an electrochemical cell?

Answer 4

Zn to Zn 2+

Question 5

The purpose of the salt bridge in an electrochemical cell is to

Answer 5

Maintain electrical neutrality in the half-cells via migration of ions

Question 6

The electrode at which oxidation occurs is called the ____

Answer 6

anode

Question 7

Which one of the following types of elements is most likely to be a good oxidizing agent?

Answer 7

Halogens

Question 8

The reduction half reaction occuring in the standard hydrogen electrode is

Answer 8

2H+ (aq, 1M) + 2e- –> H2 (g, 1 atm)

Question 9

The more ___ the value of E red, the greater the driving force for reduction

Answer 9

Positive

Question 10

Consider an electrochemical cell based on the reaction:
2H+ (aq) + Sn (s) -> Sn2+ (aq) + H2 (g)
Which of the following actions would not change the measured cell potential?

Answer 10

Addition of more tin metal to the anode component

Question 11

What is the anode in an alkaline battery?

Answer 11

Zinc powder

Question 12

Galvanized iron is iron coated with _____

Answer 12

Zinc

Question 13

Corrosion of iron is retarded by

Answer 13

High pH conditions

Question 14

One of the differences between a voltaic cell and an electrolytic cell is that in an electrolyic cell _______

Answer 14

A nonspontaneous reaction is forced to occur