Electron loss and gain

Question 1

oxidation is the

Answer 1

addition of oxygen

Question 2

reduction is the

Answer 2

removal of oxygen

Question 3

the reaction between iron(III) oxide and carbon monoxide in a blast furnace is an example of……………. because

Answer 3

both reduction and oxidation because:
Fe2O3 + 3CO = 2Fe + 3CO2
the iron is reduced while the CO is oxidised

Question 4

oxidation can also be seen as

Answer 4

the removal of hydrgen

Question 5

reduction can also be seen as

Answer 5

the addition of hydrogen

Question 6

a reaction that involves reduction and oxidation is called a

Answer 6

redox reaction

Question 7

the equation which shows the reduction and oxidation reaction between chlorine and hydrogen sulfide is

Answer 7

CL2 + H2S = 2HCl + S

Question 8

when magnesium burns in oxygen it forms

Answer 8

magnesium oxide

2Mg + O2 = 2MgO

Question 9

in the reaction between magnesium and oxygen, the magnesium is

Answer 9

oxidised

Question 10

the reaction 2Mg + O2 = 2MgO results in the formation of….and….ions

Answer 10

Mg2+ and O2- ions

Question 11

oxidation is:

Answer 11

the lass of electrons

Question 12

reduction is:

Answer 12

the gain of electrons

Question 13

OIL RIG means

Answer 13

Oxidation
Is
Loss
Reduction
Is
Gain

Question 14

the half equation for the reduction of iron(III) in a blast furnace with CO is

Answer 14

Fe3+ + 3e- = Fe

Question 15

in the reaction between magnesium and oxygen to form magnesium oxide, the reducing agent is….and the oxidising agent is….

Answer 15

reducing agent: magnesium

oxidising agent: oxygen

Question 16

disproportionation is

Answer 16

the simultaneous reduction and oxidation of an element in a single reaction

Question 17

an example of disproportionation in which copper(I) is added to water is: (show ionic equation)

Answer 17

2Cu+(aq) = Cu2+(aq) + Cu(s)

Question 18

a reducing agent is

Answer 18

a species that reduces another species by adding one or more electrons. When a reducing agent reacts it loses electrons and is, therefore, oxidised

Question 19

an oxidising agent is

Answer 19

a species that oxidises another species by removing one or more electrons. When an oxidising agent reacts it gains electrons and is, therefore, reduced