Aim:
to make acid-base indicators using everyday substances
Equipment
- red cabbage
- tea bags
- beat root
- turmeric
- cranberry juice
- beaker
- water
- tripod
- bunsen burner
- gauze mat
- 1.0 mol/L HCI (hydrochloric acid)
- 1.0 mol/L NaOH (sodium hydroxide)
Method:
- chop the cabbage into small pieces until you have enough to fill 2 cups
- place the cabbage into a large beaker and add water to cover the cabbage
- boil over the bunsen burner for at least 10 min for the color to leach out of the cabbage
- filter out the plant material to obtain a red-purple-bluish colored liquid
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