Reactions of acids Flashcards
1
Q
What is an acid?
A
Compounds that when dissolved in water release H+ ions.
2
Q
What are alkali’s?
A
Compounds that wehn dissolved in water release OH- ions.
3
Q
If a solution is purple what is the ph?
A
Alkali and over PH 7.
4
Q
If a solution is red what is the ph?
A
Acid and under PH 7.
5
Q
What happens when a strong acid is dissolved in water?
A
Every molecule splits up into ions.
6
Q
How are salts made?
A
When acids react with metals or metal compounds.
7
Q
What is a salt?
A
A compound where the hyrdrogen from an acid has been replaced by a metal.
8
Q
What is a redox reaction?
A
- The metal loses electrons- it is oxidised.
- Hydrogen gains an electron - it is reduced.
9
Q
What do bases do?
A
They neutralise acids to form water in neutralisation reactions.
10
Q
What does concentration tell us about how much of a substance there is in water?
A
- More concentrated acids have lots of acids in a small volume of water.
- Less concentrated acids have little acid in a large volume of water.
