1.1 - Formulae and Equations

Question 1

Nitrate Ion

Answer 1

NO3 -

Question 2

Hydrogencarbonate

Answer 2

HCO3 -

Question 3

Sulfide

Answer 3

S 2-

Question 4

Carbonate

Answer 4

CO3 2-

Question 5

Sulphate

Answer 5

SO4 2-

Question 6

Phosphate

Answer 6

PO4 3-

Question 7

Hydroxide

Answer 7

OH -

Question 8

Zinc

Answer 8

Zn 2+

Question 9

Aluminium

Answer 9

Al 3+

Question 10

All Group 2

Answer 10

2+

Question 11

All Group 1

Answer 11

1+

Question 12

Oxidation Number of Oxygen

Answer 12

-2

Question 13

Oxidation Number of Hydrogen

Answer 13

+1

Question 14

Exception to Hydrogen’s oxidation number

Answer 14

In Metal Hydrides

Question 15

Exceptions to Oxygen’s oxidation number

Answer 15

With Fluorine and in Peroxides

Question 16

General rule for assigning positive and negative oxidation number

Answer 16

The most electronegative has the negative oxidation number

Question 17

OILRIG

Answer 17

Oxidation is loss
Reduction is gain

Question 18

If the oxidation number increases?

Answer 18

Then the element has been oxidised

Question 19

If the oxidation number decreases?

Answer 19

Then the element has been reduced

Question 20

What is disproportionation ?

Answer 20

When the same element is both oxidised and reduced

Question 21

What is the term for when the same element is both oxidised and reduced?

Answer 21

Disproportionation

Question 22

What state are acids (generally) ?

Answer 22

Aqueous