Acids

In science we learnt somethings about acids. Here is what we learnt.

What is an acid?  An acid is a liquid that has a pH of between 1-7. It tastes sour and is used in batteries and in our stomachs.

What are 3 examples of acids? Lemons that have citric acid, viniger what is acetic acid, and batteries sulphuric acid.

Red Cabbage Indicator ecperiment

Materials

1. Red Cabbage

2. Beaker

3. Bunsen Burner

4. Pipette

5. Sodium Hydroxide

6. Hydrochloric acid

7. Test Tubes

8. Paper Towel

9. Test tube rack

10. Water

11. Floor cleaner

12. Dishwashing powder

13. Fabric softener

Steps

1. Chop up the red cabbage into small pieces. Place in a beaker and cover with a small amout of water.

2. Bring the solution to the boil using a bunsen burner and then turn off the heat. Let it sit to cool down.

3. Pour the cabbage water through a paper towel into a beaker. The dark purple liquid in the jar is the pH indicator liquid.

4. Suck up the indicator into the pipette.

5. Use the cabbage indicator and the pH chart below to test the acidity of the different three household liquids plus the hydrochloric acid and ammonium hydroxide.