ph is a scale of acidity from 0 to 14 with 7 being netural.
ph scale acidic: 0-battery
1- stomach acid
2- lemon
3- vinegar
4- tomato
7 netural-water
base:
13-bleach.
equipment: red cabbage
knife
bunsen burner
beaker
water
steps
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 is boiled leave it to cool down.
4. once the cabbage is cooled remove the cabbage leaves and use red water as an indicator.


