Redox

Question 1

What are oxidation numbers given?

Answer 1

Roman numerals

Question 2

What is the oxidation number of an uncombined element?

Answer 2

0

Question 3

What do the oxidation numbers of all the atoms in a molecule add up to?

Answer 3

0

Question 4

What is the oxidation number of a simple ion?

Answer 4

the charge of the ion

Question 5

What are the oxidation numbers of group 1, group 2 and group 3 metals?

Answer 5

+1
+2
+3

Question 6

What the oxidation number of a fluorine atom?

Answer 6

-1

Question 7

What is the oxidation number of a hydrogen atom?

Answer 7

+1 (NaH is an exception)

Question 8

What is the oxidation number of oxygen?

Answer 8

-2

Question 9

What is oxidation?

Answer 9

-loss of electrons
-increase in oxidation number

Question 10

What is reduction?

Answer 10

-Gain of electrons
-Decrease in oxidation number

Question 11

When analysing reactions what is oxidation?

Answer 11

-loss of hydrogen
-gain of oxygen

Question 12

When analysing organic reactions what is reduction?

Answer 12

-gain of hydrogen
-loss of oxygen

Question 13

When calculating the oxidation number what should you start with?

Answer 13

-metal first unless it is a transitional metal

Question 14

What are spectator ions?

Answer 14

ions that remain uncharged

Question 15

What happens to a reducing agent?

Answer 15

it becomes oxidised

Question 16

what happens to the oxidising agent?

Answer 16

it becomes reduced

Question 17

What are the other names for the oxidising and reducing agent?

Answer 17

-Oxidant
-Reductant

Question 18

What does -ate mean?

Answer 18

-negative ion know it’s oxygen

Question 19

What is disproportionation?

Answer 19

a type of redox reaction where the same element is both oxidised and reduced

Question 20

What the chemical accepting the electrons in a redox reaction?

Answer 20

oxidising agent

Question 21

What is the chemical donating the electrons in a redox reaction called?

Answer 21

the reducing agent

Question 22

What does the electron configuration of an atom describe?

Answer 22

the arrangement of electrons in the shells

Question 23

How are electrons placed?

Answer 23

Into shells- starting with the lowest energy level first