Indicator/acids/alkalis Flashcards
0
Q
What’s a Universal indicator
A
A mixture of indicators
1
Q
What’s an indicator
A
Indicators are chemicals that change colour in presence of an acid or alkali
2
Q
What’s pH
A
Scale that measures the strength of acid and alkali
3
Q
Scale of 1-6 is more
A
Acidic
4
Q
Scale of 7 ph is
A
Neutral
5
Q
Scale of 8-14 ph is
A
Alkali
6
Q
Anything below ph of 7 turns universal indicator
A
Red (1) orange(2-4) yellow(5-6)
7
Q
Colour of ph above 7 is
A
Blue(8-12) or purple(13-14)
8
Q
Alkalis can neutralise
A
Acids
9
Q
Acids can neutralise
A
Alkalis
10
Q
Alkalis are
A
Bases that react with acids by absorbing hydrogens ions
11
Q
Alkalis are bases that
A
Dissolve in water
12
Q
Acids contain
A
H+ ions
13
Q
What’s insoluble
A
Dosnt dissolve
14
Q
Acid+alkali =
A
Salt+water
