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Acids and Bases
Question | Answer |
---|---|
What is an acid | A substance which turns blue litmus red and has a pH of less than 7. |
What is a base | A substance which turns red litmus blue and has a pH of greater than 7. |
Give an example of an everyday acid | Vinegar |
Give an example of a laboratory acid | Hydrochloric acid |
Give an example of an everyday base | baking soda |
Give an example of a neutral solution | water |
Define an indicator | An indicator is a compound that shows by means of a colour change whether a substance is acidic or basic |
Identify which indicator is used to tell if a substance is an acid or a base | Litmus paper is an example of an indicator |
State what colour litmus paper goes when it is added to an acid | red |
State what colour litmus paper goes when it is added to an acid | blue/purple |