Making acids and alkalis

S2 ChemistryClassifying chemicals and chemical reactions

Learning outcomes Success criteriaKnow the effects of metal oxides and non-metal oxides on the pH of water.

Given the name of an oxide, you can state what effect it will have on the pH of water.

Explain why some oxides have no effect on the pH of water.

Name of compound

FormulaColour of solution

with Universal indicator

pHAcidic,

alkaline or neutral?

Carbon dioxide

Nitrogen dioxide

Potassium oxide

Copper(II) oxide

Magnesium oxide

Sulphur dioxide

Iron(III) oxide

Calcium oxide

Aluminium oxide

Investigating oxides

Name of compound

FormulaColour of solution

with Universal indicator

pHAcidic,

alkaline or neutral?

Carbon dioxide CO2 Red 3 Acidic

Nitrogen dioxide NO2 Red 1 Acidic

Potassium oxide K2O Purple 13 Alkaline

Copper(II) oxide CuO Green 7 Neutral

Magnesium oxide

MgO Blue/purple 9 Alkaline

Sulphur dioxide SO2 Red 2 Acidic

Iron(III) oxide Fe2O3 Green 7 Neutral

Calcium oxide CaO Purple 13 Alkaline

Aluminium oxide Al2O3 Green 7 Neutral

Investigating oxides

Learning outcomes Success criteriaKnow the effects of metal oxides and non-metal oxides on the pH of water.

Given the name of an oxide, you can state what effect it will have on the pH of water.

Explain why some oxides have no effect on the pH of water.

Acid Rain

S2 ChemistryClassifying chemicals and chemical reactions

Learning outcomes Success criteriaUnderstand what acid rain is. Explain why rain water is

naturally acidic.

Define the term “acid rain”.

Know names of chemicals which can cause acid rain.

Name two chemicals which can cause acid rain.

Understand how chemicals which cause acid rain are produced.

Describe how sulphur dioxide which causes acid rain is produced.

Describe how nitrogen dioxide which causes acid rain is produced.

Understand why acid rain is bad for the environment.

Describe two harmful effects of acid rain on the environment.