pH indicators

Kia ora readers,

Today is science we are going learn about what does pH meaning. For the pH scale is around 0 to 14. 0 is Acidic 7 Neutral and 14 is Alkaline.

 Definition: pH (potential of hydrogen) is a scale of acidity

from 0 to 14 with 7 being neutral.

ph Explained

All solutions have a pH. Acid solutions, have lower pH. Alkaline solutions, have higher pH. Substances that aren't acidic or alkaline (that is, neutral solutions) usually have a pH of 7. Acids have a pH that is less than 7. Alkalis have a pH that is greater than 7.

Adcidic food:

1. battery
2. stomach acid
3. lemon
4. vinegar
5. tomato
6. coffee
7. milk

Neutral food:

1. water
2. blood
3. baking soda
4. stomach tablets

Alkaline food:

1. solution
2. soap
3. bleach
4. drain cleane

The ph Scale

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 remove the cabbage leaves and use the red water as an indicator.

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