We have made Cabbage Indicator, Cabbage litmus paper and now we are going to use it in this experiment to test for the presence of an acid or a base.
Things Required:
1 cabbage paper strip (prepared in experiment Cabbage Litmus Paper)
Cookie sheet
1 sheet of notebook paper
2 eyedroppers
vinegar
Household ammonia
2 small baby food jars
Directions:
Fill one of the small jars one-quarter full with vinegar and place an eyedropper in it. Fill the second jar one-quarter hill with ammonia and place an eyedropper in the jar. Place the notebook paper on the cookie sheet. Lie the piece of cabbage testing paper on top of the notebook paper. On one end of the cabbage paper place two drops of vinegar. Add 2 drops of ammonia to the opposite end of the cabbage paper.
This Is What Happens:
Ammonia turns the paper green and vinegar produces a pink colour.
Science Behind It:
Cabbage testing paper is used to test for the presence of acids or bases. The chemicals in the cabbage juice always produce the same colour changes. Bases change the paper to green, and acids produce a pink-to-red colour. The cabbage paper in this lab indicates that ammonia is a basic chemical and that vinegar is acidic.
