acids and alkalis Flashcards
(12 cards)
1
Q
what is neutral ph
A
7
2
Q
what is an indicator
A
a dye that changes colour
3
Q
what colour is litmus paper in acid
A
red
4
Q
what colour is litmus paper in alkali
A
blue
5
Q
what colour is litmus paper when neutral
A
purple
6
Q
what is colour phenolphthalein in acid
A
colourless
7
Q
what colour is phenolphthalein in alkali
A
bright pink
8
Q
what colour is methyl orange in acid
A
red
9
Q
what colour is methyl orange in alkali
A
yellow
10
Q
what is an acid a source of
A
hydrogen ions (H+)
11
Q
soluble salts
A
sodium potassium ammonium nitrates chloride sulfate
12
Q
insoluble salts
A
carbonates
hydroxides
