Common formulae

Can you remember the formulae for these

compounds?

Hydrogen gas

H2

Don’t forget the two!

Nitric acid

HNO3

All acids contain hydrogen!

Sodium chloride

NaCl

This is salt that you put on your food

Sodium carbonate

Getting tricky now!

Na2CO3

The carbonate ion is CO32-

Magnesium Sulphate

This is lovely in the bath!

MgSO4

Sodium hydroxide

Great for cleaning drains!

NaOH

Nitrogen gas

Nearly 80% of the atmosphere

N2

Calcium chloride

CaCl2

Because calcium is in group 2!

Magnesium hydroxide

Mg(OH)2

A magnesium ion is Mg2+ and hydroxide is OH-