Chapter 20: Electrochemistry

Question 1

Who is responsible for electrochemistry

Answer 1

Humphry Davy

Question 2

Electrolysis

Answer 2

The use of an electric current to bring about a chemical reaction in an electrolyte

Question 3

Electrolyte

Answer 3

A compound compounds that conducts an electric current when molten or dissolved in water

Question 4

What are inert electrodes made out of

Answer 4

Platinum

Question 5

What are active electrodes made out of

Answer 5

Copper

Question 6

Which is Sulfuric Acid added to water

Answer 6

To assist the water to conduct electricity

Question 7

Which is produced at the positive electrode of water

Answer 7

Oxygen

Oxidation

Question 8

Water Equation for Positive Electrode

Answer 8

H2O —> 1/2O2 + 2H+ + 2e-

Question 9

Which is produced at the negative electrode of water

Answer 9

Hydrogen

Question 10

Water Equation for Negative Electrode

Answer 10

2H+ + 2e- —> H2

Question 11

Sodium Sulfate Equation for Negative Electrode

Answer 11

2H2O + 2e- —> H2 + 2OH

Question 12

Sodium Sulfate Equation for Positive Electrode

Answer 12

2H2O —> O2 + 4H+ + 4e-

Question 13

Copper Equation for Negative Electrode

Answer 13

Cu2+ + 2e- —> Cu

Question 14

Electroplating

Answer 14

Process where electrolysis is used to put a layer of one metal on the surface of another
Makes an object more attractive
Protect from corrosion

Question 15

Galvanic Cell

Voltaic Cell

Answer 15

A cell in which a chemical reaction results in the production of an electric current

Question 16

Electrode Potential

Answer 16

The tendency of a metal to lose electrons

Question 17

Electrochemical Series

Answer 17

A list of elements in order of their standard electrode potentials