indicators Flashcards
1
Q
why do we need indicators?
A
since acids and bases are both clear and colourless, there is no visual way to detect acidity or basicity
2
Q
what is an indicator?
A
a chemical that changes colour depending on whether it is added to an acid or a base
3
Q
phenolphthalein- acid
A
cloudy
4
Q
phenolphthalein- base
A
pink
5
Q
bromothymol blue- acid
A
yellow
6
Q
bromothymol blue- base
A
blue
7
Q
methyl orange- acid
A
red
8
Q
methyl orange- base
A
yellow
9
Q
blue litmus- acid
A
red
10
Q
blue litmus- base
A
blue
11
Q
red litmus- acid
A
red
12
Q
red litmus- base
A
blue
