Chemical formula


Interactive Chemistry Worksheets for Students


Periodic table

Naming compounds

Basic formula

Simple compounds

Ionic compounds 1

Ionic compounds 2

Chemical suffixes

Old chemical names

Hydrocarbons - Alkanes

Alkanes, alkenes & alkynes

Alkanols to alkanoic acids


Common compounds

Common formula quiz

Acids, bases and salts

Covalent compounds

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Formula calculators

Chemical formula calculator





Naming chemical compounds




Naming chemical symbols



Student lessons

Teacher resources

Raining vinegar

In some places in world the rain water has become so polluted with chemicals that it is like vinegar. This type of rain is called acid rain.

Pure water is neutral and has a pH of 7.

Natural rain water is slightly acidic mainly because of dissolved CO2 which produces carbonic acid or H2CO3

H2O(l) + CO2(g) <==> H2CO3(aq)

The pH of unpolluted rainwater ranges from pH 5 to 6.

Acid rain is rain water with a pH of less than 5. 

How hydrogen peroxide sunk a nuclear submarine

The chemical formula of hydrogen peroxide is H2O2 which looks similar to water. Its properties however, are completely different. Hydrogen peroxide is commonly used as an antiseptic and to lighten or bleach hair.