Acids and alkalis
acids and alkalis are two groups of chemicals.We can test them using an Indicator. eg universal indicator. This shows if it's an acid or an alkalis
Acid: red/orange/yellow= ph 1 - 6
Neutral: green = ph 7
Alkalis: blues/purples= ph 8 - 14
Acid rain is formed when sulphar dioxide dissolves in rain water which makes it acidic. Nitrogen oxides can also form acid rain.
The best way acid rain can be reduced…