Common formulae

1
Common formulae

• Can you remember the formulae for these compounds?

2
Hydrogen gas
3
H2

• Dont forget the two!

4
Nitric acid
5
HNO3

• All acids contain hydrogen!

6
Sodium chloride
7
NaCl

• This is salt that you put on your food

8
Sodium carbonate

• Getting tricky now!

9
Na2CO3

• The carbonate ion is CO32-

10
Magnesium Sulphate

• This is lovely in the bath!

11
MgSO4
12
Sodium hydroxide

• Great for cleaning drains!

13
NaOH
14
Nitrogen gas

• Nearly 80 of the atmosphere

15
N2
16
Calcium chloride
17
CaCl2

• Because calcium is in group 2!

18
Magnesium hydroxide
19
Mg(OH)2

• A magnesium ion is Mg2 and hydroxide is OH-