Definition: pH (potential of hydrogen) is a scale of acidity from 0 to 14 with 7
being neutral.
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. Alkaline have a pH that is greater than 7.
Write down the 15 substances from the diagram and beside them list their pH level.
List them under 2 headings. 1. Acidic 2. Alkaline
Experiment: Red Cabbage indicator.
Equipment:
Red Cabbage
Knife
Bunsen Burner
Beaker
Water
Method:
Cut the cabbage into small pieces.
Place the cabbage in the beaker and fill it with 50 ml of water.
Once the cabbage has boiled for 2 minutes turn it off and leave it to cool down.
Method:
Cut the cabbage into small pieces.
Place the cabbage in the beaker and fill it with 50 ml of water.
Once the cabbage has boiled for 2 minutes turn it off and leave it to cool down.
Name another pH indicator used in a science lab?
Here are 4 Acids. Battery Acid, Stomach Acid, Lemon and Vinegar.
Here are 4 Alkaline's. Drain Cleaner, Bleach, Soap and Baking Soda.
By using red cabbage as an indicator we can determine what the pH level is of substances.
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