Today in Science we are looking at acids and bases.
What makes something acid?
An acid contains Hydrogen atoms that break off to react with a substance.
What are 3 examples/names of acids:
Hydrochloric Acid
Sulfuric Acid
Nitric Acid
Citric Acid
Acetic Acid
Formic Acid
Carbonic Acid
What is an acid?
An acid (HA) is a solution that breaks into H+ and A-
Aim: To make red cabbage pH indicator for use on different household chemicals
Red Cabbage indicator
Materials:
1. Red cabbage
2. Beaker
3. Bunsen Burner
4. Pipette
5. Sodium Hydroxide
6. Test tubes
7. Paper towels
8. Test tube rack
9. water
10. Hydrochloric acid
Steps:
1. Chop up the cabbage into small pieces. Place beaker and cover
2. Bring the solution to boil using a bunsen burner and then turn the heat off. Let it sit to cool down.
3. Pour 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 a pipette
5. Use the cabbage indicator and the pH chart below to test the acidity of the different 3 household liquids plus the hydrochloric acid and ammonium hydroxide.
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