Indicators Flashcards
1
Q
What is an indicator?
A
Things that change to different colours when in contact with either an acid or base
2
Q
3 indicators
A
Litmus paper, methyl orange, thymolphthalein
3
Q
Litmus with acid
A
Turns litmus red from red or blue
4
Q
Litmus with alkali
A
Turns litmus blue from red or blue
5
Q
Methyl orange with acids
A
Turns red from orange
6
Q
Methyl orange with bases
A
Turns yellow from orange
7
Q
Thymolphthalein with acids
A
Stays colorless (below 9.3)
8
Q
Thymolphthalein with bases
A
Turns from colourless to blue
