To Extract and Test Red Cabbage Indicator

Question 1

Equipment

Answer 1

1. Bunsen Burner
2. Tripod
3. Wire Gauze
4. Beaker
5. Glass Rod
6. Test-Tube Rack
7. Test Tubes
8. Dropper

Question 2

Chemicals

Answer 2

1. A Range of Acidic, Alkali and Neutral Substances
2. Water
3. Red Cabbage

Question 3

Step 1

Answer 3

Tear up some red cabbage leaves and add them to a beaker containing approximately 100cm3 of water.

Question 4

Step 2

Answer 4

Heat the water to boiling and stir the leaves using a glass rod. The water turns purple as the indicator is extracted from the leaves.

Question 5

Step 3

Answer 5

Allow the solution to cool.

Question 6

Step 4

Answer 6

Add acidic, neutral and alkaline solutions to different test tubes.

Question 7

Step 5

Answer 7

Using a dropper add 5-6 drops of the red cabbage indicator to each test tube. Stopper the tubes and shake.

Question 8

Step 6

Answer 8

Note the colour in each test tube and summarise your results.