0: battery
1:stomach acid
2: lemon
3:vinegar
4: tomato
5: coffee
6: milk
7: water
8:blood
Equipment:
1 red cabbage
2 knife
3 bunsen burner
4 beaker
5 water
Method:
1 cut the cabbage into small pieces.
2 place the cabbage in the beaker and fill it with 50 ml of water.
3 once the cabbage has boiled for 2 minutes turn it off and leave it to cool down.
4 once it has cooled removed the cabbage leaves and use the red water as an indicator.
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