Indicators And The PH Scale Flashcards
1
Q
what are indicators
A
coloured dyes that change colour when mixed with acids and alkalies
2
Q
what plants do indicators come from
A
red cabbage and beetroot
3
Q
what is litmus
A
an indicator that changes red in acids and blue in alkalies
4
Q
what is the PH scale
A
the measure of the strengths of acids and alkalies, which runs from 1 to 14
5
Q
what is numbers 1-6
A
acids
6
Q
what is numbers 7
A
neutral
7
Q
what is numbers 8-14
A
alkalies
8
Q
how can you find the ph number
A
by using a universal indicator or by using a ph meter
9
Q
example of ph 1
A
stomach acid
10
Q
example of ph 2
A
lemon juice
11
Q
example of ph 3
A
vinegar
12
Q
example of ph 4
A
fizzy drinks
13
Q
example of ph 5
A
skin
14
Q
example of ph 6
A
milk
15
Q
example of ph 7
A
pure water and blood
