Question 29
In this activity you will demonstrate the different colours shown by universal indicator solution.
You will need
The apparatus shown in the diagram.
Safety
Wear safety glasses.
1. Fix a test tube into a clamp stand and place it somewhere it will not get moved.
2. Place a crystal of washing soda in the bottom of a test tube.
3. Carefully add some water until the tube is about two-thirds full.
4. Add a few drops of universal indicator.
5. Carefully pour some acid on the top. Do not shake the tube.
6. Leave the tube to stand for a few days.
Additional safety guidance: The teacher supplies suitable small quantities and dilute hydrochloric acid, supervises the setup and stores the labelled tube safely. Do not seal the tube or handle it outside the supervised activity.
You will need
The apparatus shown in the diagram.
Safety
Wear safety glasses.
1. Fix a test tube into a clamp stand and place it somewhere it will not get moved.
2. Place a crystal of washing soda in the bottom of a test tube.
3. Carefully add some water until the tube is about two-thirds full.
4. Add a few drops of universal indicator.
5. Carefully pour some acid on the top. Do not shake the tube.
6. Leave the tube to stand for a few days.
Additional safety guidance: The teacher supplies suitable small quantities and dilute hydrochloric acid, supervises the setup and stores the labelled tube safely. Do not seal the tube or handle it outside the supervised activity.
