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Litmus Indicator

Litmus Indicator. Learning objective Examples of acids and alkalis Describe how to use litmus indicator Identify acids and alkalis using litmus indicator. What do all these things have in common?. What is an indicator?. How can you test a liquid to find if it is an acid or an alkali?

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Litmus Indicator

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  1. Litmus Indicator Learning objective Examples of acids and alkalis Describe how to use litmus indicator Identify acids and alkalis using litmus indicator

  2. What do all these things have in common?

  3. What is an indicator? How can you test a liquid to find if it is an acid or an alkali? An indicator is a special chemical that changes to a different colour in an acid or an alkali. Litmus paper and litmus solution are examples of indicators. Red Litmus is red in acid. Blue litmus turns red in acid Blue Litmus is blue in alkali. Red litmus turn blue in alkali

  4. Litmus test experiment

  5. The Litmus Test Aim: Use Litmus Paper to identify different acid, alkali and neutral solutions. Wear goggles!

  6. Method: • Collect your equipment. • In 9 wells of a spotting tile add one piece of red litmus paper. • To each well add 2 drops of each substance following the grid below. • kettle descaler • tap water • battery acid • oven cleaner • kitchen surface cleaner • ammonia • shower cleaner • bleach • Vinegar • Record the colour that the red litmus paper has changed to in your results table. • Using a paper towel put the litmus paper in the bin. Rinse and dry the spotting tile. • Repeat steps above using blue litmus paper. • Identify the solution as acid, alkali or neutral.

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