Indicators Flashcards
1
Q
When does blue litmus paper react?
A
Turns red in acid
Blue
Red
Acid
2
Q
When does red litmus paper react?
A
Turns blue in base.
Red
Blue
Base
3
Q
What colour does phenolphthalein turn in a acid and base?
A
acid- remains colourless
Base- fuchsia/ pink
4
Q
What colour does bromethymol blue turn in an acid and base?
A
Acid- yellowish
Base-Blue
5
Q
What colour does congo red turn in an acid and a base?
A
Acid- blueish purple
Base- still red
