c4 - acids and alkalis Flashcards
1
Q
what are the numbers in the ph scale?
A
0-14
2
Q
what does the ph scale do?
A
measure how acidic or alkaline a solution is
3
Q
the lower the ph…..
A
the more acidic it is
4
Q
the higher the ph…..
A
the more alkaline it is
5
Q
what do acids and bases do?
A
neutralise eachother
6
Q
what is a acid?
A
substance that forms aqueous solutions with a ph lower than 7
7
Q
what is a base?
A
a substance with a ph higher than 7
8
Q
what is a alkali?
A
an alkali dissolves in water
9
Q
what is a reaction between and acid and a base called?
A
neutralisation
10
Q
what type of ions do acids form?
A
H+ ions
11
Q
what type of ions does a base form?
A
OH+ ions
12
Q
what is neutral on the ph scale?
A
7
