Acids And Alkalis Flashcards
1
Q
What colour are acids and alkalis?
A
Acid- red
Alkali-indigo
2
Q
What is an example indicator?
A
Litmus
3
Q
What happens if the indicator is used on a neutral substance?
A
The colour does not change
4
Q
What is the pH scale?
A
A scale used to show how acidic or alkaline a substance is
5
Q
What is the neutral, acids and alkalis numbers on the pH scale
A
Neutral- 7
Acids- below 7
Alkaline- above 7
6
Q
What type of indicator measures the pH?
A
Universal Indicator
7
Q
What is neutralisation?
A
When an acid is added to an alkali or other way round so that it cancels it out and makes the substance neutral
8
Q
What equation produces salt and water?
A
Acid +base - salt +water
