Indicators resources

Explain how to test if a solution is an acid or not, and describe and explain what happens if rusty nails are put in an acid. Assessment focus: acid reactions.

Students draw up a table to illustrate results of how indicators change when placed into four different liquids.

This practical task has two parts. The first part of this practical requires students to observe the effects of different indicators on different substances. Students use these results to identify if some other substances are acid, alkali, or neutral.

In this NEMP task students conduct a test to identify whether a number of substances are acid, base or neutral. They also answer a question about neutralising. Assessment focus: testing acid or base.