Redox Titration

Question 1

It is a number assigned to an element in a compound which enables us to describe oxidation-reduction reactions and balancing redox chemical reactions.

Answer 1

Oxidation state

Question 2

most common source of error; caused by resistance to the flow of charge at a boundary

Answer 2

junction potential

Question 3

It consumes electrical energy from an external source, using it to cause a nonspontaneous redox reaction to occur ( ΔG>0 ).

Answer 3

Electrolytic cell

Question 4

These are shown by single vertical lines

Answer 4

Phase boundaries

Question 5

The _______________ is the substance that loses electrons and is oxidized in the process

Answer 5

reductant

Question 6

The reaction of gaseous hydrogen chloride and iron oxide is a __________________________

Answer 6

double replacement reaction

Question 7

energy released by spontaneous redox reaction is converted to electrical energy

Answer 7

galvanic cell

Question 8

It relates the potential, E, to the standard electrode potential, E⁰ by the following equation

Answer 8

Nernst equation

Question 9

Oxidation state enables us to describe __________________ and _____________________.

Answer 9

oxidation-reduction reactions, balancing redox chemical reactions

Question 10

The oxidation number of a monatomic (composed of one atom) ion is the same as the ________ of the ion

Answer 10

charge

Question 11

It is considered to be any element in an uncombined state, whether monatomic or polyatomic.

Answer 11

free element

Question 12

There is no net change in the number of electrons in a

Answer 12

redox reaction

Question 13

In molecular compounds, the names are given which refer to the ________________ present in the compound.

Answer 13

number of molecules

Question 14

An ________________________ is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.

Answer 14

oxidation-reduction reaction

Question 15

In ionic compounds, the names are given which refer to the ___________________.

Answer 15

oxidation (ionic) state

Question 16

It uses the energy released during a spontaneous redox reaction (ΔG<0) to generate electricity.

Answer 16

Galvanic (voltaic) cell

Question 17

electrical energy is used to drive nonspontaneous redox reaction

Answer 17

electrolytic cell

Question 18

ΔG < 0

Answer 18

reaction can spontaneously proceed to the right

Question 19

reduced, accepts electrons, oxidation number decreases

Answer 19

oxidizing agent

Question 20

In ionic and covalent molecular compounds, usually the ____________________ element is given first.

Answer 20

less electronegative

Question 21

OIL RIG

Answer 21

“oxidation is loss” and “reduction is gain,“

Question 22

LEO says GER

Answer 22

“loss of e- = oxidation” and “gain of e- = reduced.”

Question 23

When the circuit is closed, electrons flow from the _________ to the ____________

Answer 23

anode, cathode

Question 24

____________________ have some practical significance in everyday life, including the reaction of hydrogen peroxide, H2O2 poured over a cut.

Answer 24

Disproportionation reactions

Question 25

In a neutral molecule, the sum of the oxidation numbers of all atoms is _______

Answer 25

zero

Question 26

A redox reaction can be described as ____________________, one representing the oxidation process and one the reduction process.

Answer 26

two half-reactions

Question 27

In ______________________ the names are given which refer to the oxidation (ionic) state.

Answer 27

ionic compounds

Question 28

ΔG > 0

Answer 28

reaction can spontaneously proceed to the left

Question 29

It is an apparatus that is used to generate electricity from a spontaneous redox reaction or, conversely, that uses electricity to drive a nonspontaneous redox reaction

Answer 29

Electrochemical cell

Question 30

it is where reduction half-reaction occurs

Answer 30

cathode

Question 31

it is where oxidation half-reaction occurs

Answer 31

anode

Question 32

Oxidation-Reduction Reaction comprised of two parts

Answer 32

1. reduced half 2. oxidized half

Question 33

There is no ___________ in the number of electrons in a redox reaction.

Answer 33

net change

Question 34

The ___________ of the cell, measured in volts, is the difference in electrical potential between the two half-reactions and is related to the energy needed to move a charged particle in an electric field.

Answer 34

potential

Question 35

“Red Cat An Ox”

Answer 35

Reduction in cathode; Oxidation in anode

Question 36

the _____________ is the species that gains electrons and is reduced in the process

Answer 36

oxidant

Question 37

The oxidation number of an atom in a neutral free element is __________.

Answer 37

zero

Question 38

It is the movement of an electron from one atom to another.

Answer 38

Electron transfer

Question 39

In ___________________, the names are given which refer to the number of molecules present in the compound.

Answer 39

molecular compounds

Question 40

Both types contain _________________, which are solid metals connected to an external circuit that provides an electrical connection between the two parts of the system.

Answer 40

two electrodes

Question 41

Phase boundaries are shown by?

Answer 41

single vertical lines

Question 42

charge an atom would possess if the bonding were ionic

Answer 42

oxidation state

Question 43

This does not need to begin with neutral molecules and can involve more than two species with differing oxidation states (but rarely).

Answer 43

Disproportionation reactions

Question 44

The identity of the electrodes and the chemical contents of the compartments are indicated by their chemical formulas, with the anode written on the far ____ and the cathode on the far _____.

Answer 44

left, right

Question 45

ΔG = 0

Answer 45

the reaction is at equilibrium

Question 46

It is a useful tool for keeping track of electron transfers especially for transition metals.

Answer 46

Oxidation state

Question 47

single substance can be both oxidized and reduced in some redox reactions. These are known as ________________________________

Answer 47

disproportionation reactions

Question 48

The associated ______________________ is determined by the potential difference between the valence electrons in atoms of different elements.

Answer 48

potential energy

Question 49

oxidized, donates electrons, oxidation number increases

Answer 49

reducing agent

Question 50

charge that results when the electrons in a covalent bond are assigned to the more electronegative atom

Answer 50

oxidation state