Lesson 4: pH scale Flashcards
1
Q
What is an indicator?
A
Indicator: a substance that changes colour depending on the pH of a solution.
2
Q
What is litmus paper?
A
Litmus paper: an indicator that will turn blue/ red
3
Q
What colour is litmus paper in an acid?
A
- Stay red.
- Turn red.
4
Q
What is the pH scale?
A
- Measure of acidity and alkalnity from 0 to 14
5
Q
What is a pH probe and how is it the best indicator?
A
pH probe: digital device that tells pH of a substance
No confusion with colours.
