Electrochem QQ Trade

Question 1

What is the definition for loss of electron(s) by a species

Answer 1

Oxidation

Question 2

What is definition for gain of electron by a species

Answer 2

Reduction

Question 3

What is the species being reduced called?

Answer 3

Oxidizing agent

Question 4

What is the species being oxidized?

Answer 4

Reducing agent

Question 5

What is the name of the reaction with both oxidation and reduction occurring together?

Answer 5

Redox reaction

Question 6

A spontaneous reaction occurs in which cell?

Answer 6

Galvanic/Voltaic cells

Question 7

In a galvanic cell which electrode is positive?

Answer 7

Cathode

Question 8

Which electrode does oxidation occurs?

Answer 8

Anode

Question 9

Which direction does the electron flow in the external circuit in a cell?

Answer 9

From anode to cathode

Question 10

Which direction does the ions flow through the salt bridge?

Answer 10

Anions to anode & Cations to cathode

Question 11

Which electrode gains mass?

Answer 11

Cathode

Question 12

The addition method for finding the E of the cell is?

Answer 12

Ered + Eox (flipped)

Question 13

The E value for a spontaneous reaction must be __________?

Answer 13

Positive

Question 14

The subtraction method for finding the E of a cell is ?

Answer 14

Ered-Eox (from the chart)

Question 15

The charge or valency of an atom is called ?

Answer 15

Oxidation number

Question 16

Give two ways to balance redox reactions?

Answer 16

Oxidation numbers & half reaction methods

Question 17

Group 1 and 2 ALWAYS have oxidation numbers ____ and ____?

Answer 17

+1 & +2

Question 18

What is the charge of hydrogen most of the times?

Answer 18

+1

Question 19

To balance charges you add _______

Answer 19

Electrons

Question 20

To balance Hydrogens you add_____________

Answer 20

H+

Question 21

To balance Oxygens you add_____________

Answer 21

H2O

Question 22

What is used to represent the salt bridge in the Daniel cell?

Answer 22

Two lines in the center

Question 23

What is the Shorthand notation of a galvanic cell called?

Answer 23

Daniel cell

Question 24

In a Daniel cell which species goes on the right?

Answer 24

Reduced species

Question 25

When two metal in their metal ions are in a cell, which one will be reduced?

Answer 25

The higher E value

Question 26

The passage of current through a cell to cause electrical energy to be converted to chemical energy is called________________

Answer 26

Electrolysis

Question 27

In an electrolytic cell, the cations move to the ___________ and the anions move to the ________

Answer 27

Cathode, anode

Question 28

In an electrolytic cell, __________occurs at the cathode and __________ occurs at anode.

Answer 28

Reduction, oxidation

Question 29

For an aqueous solution what two reactions are competing at the cathode?

Answer 29

Reduction of the metal ion and reduction of water

Question 30

The reaction in an electrolytic cell is _______________ and the E value must always be __________.

Answer 30

Non-spontaneous, negative

Question 31

What is the symbol and unit of quantity of electricity passing through the cell

Answer 31

Q, Coloumbs

Question 32

Q= ____ x _____ and the units are _____ and _____

Answer 32

Q=IT and the units are amperes & seconds

Question 33

One Faraday is equivalent to ____________ coloumbs and liberates only ________ mole of electron.

Answer 33

96500, one