Lesson 4 of 14
Turmeric paper and red rose
Show on a big screenYou have vinegar, baking soda water and sugar water. You have only turmeric paper. Can it name all three?
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The idea
No. Turmeric paper stays yellow in vinegar and in sugar water. So it cannot tell an acid from a neutral liquid.
Litmus is not the only indicator. Turmeric paper is yellow. Red rose extract is the coloured liquid from red rose petals.
| Indicator | Acidic | Basic | Neutral |
|---|---|---|---|
| Blue litmus | turns red | stays blue | stays blue |
| Red litmus | stays red | turns blue | stays red |
| Turmeric paper | stays yellow | turns red | stays yellow |
| Red rose extract | red | green | no change |
Step 1 of 4
- Two dry strips: blue litmus, turmeric.
- In lemon juice: litmus turns red. Turmeric stays yellow.
- In soap water: litmus stays blue. Turmeric turns red.
- The paper changes. Not the group.
Turmeric turns red in a base only. Red rose is red in an acid and green in a base.
Try the lab to finish this lesson.