Learning About PH. (Acids) ¬Acid And Alkaline¬

1. Acid And Alkaline

Acids are PH 0 to 7.

Alkaline are PH 7 to 14.

2. Examples of acids are:

1. Vinegar.
2. Stomach Acid.
3. Battery.

3. Examples of alkaline are:

1. Blood.
2. Stomach Tablets.
3. Baking Soda.

Challenge:

To use acids and alkalines to make 6 different of  the pH scale.

Equipment:

• Universal Indicator.
• 1 M HCl (Hydrochloric Acid)
• 1 M NaOH (Sodium Hydroxide)
• 4 Test tubes.
• Test tube rack.
• 2 plastic pipettes.

Method:

1. Take a test tube rack with 1 boiling tube at each end of rack and 4 test tubes.
2. Half Fill the boiling tube at one end with Sodium Hydroxide.
3. Half fill the boiling tube at the other end with Hydrochloric Acid.
4. Fill each test tube with 5 drops of Universal Indicator.
5. Using the pipettes you will add drops of the acid or alkaline to the test tubes to make colours or Red, Orange, Yellow, Green, Blue, Violet,