acids and alkalis Flashcards
1
Q
ph scale
A
below 7- acid
7- neutral
above 7- alkali
2
Q
dilute an acid
A
ph increases towards 7
3
Q
dilute an alkali
A
ph decreased towards 7
4
Q
base
A
any substance that neutralises an acid (example: sodium hydroxide solid)
5
Q
alkali
A
solution that neutralises an acid eg sodium hydroxide solution
6
Q
more hydrogen (H+[aq]) ions than hydroxide (OH-[aq]) ions
A
acid
7
Q
more hydroxide (OH-[aq]) ions than hydrogen ions
A
alkali
8
Q
metal + acid
A
= metal salt + hydrogen
9
Q
to make a soluble salt
A
neutralise an acid with an alkali
10
Q
soluble salts are made by _____ reactions
A
neutralisation
11
Q
insoluble salts are usually made by ____ reactions
A
precipitation
12
Q
formula for average titre
A
end- start (do twice), result + result divided by 2
