Acids and Alkalis Flashcards
1
Q
Acid
A
Release H+ ions
pH < 7
e.g HCl (Hydrochloric Acid)
2
Q
Base
A
Release OH- ions
pH > 7
e.g NaOH (Sodium Hydroxide)
3
Q
Alkali
A
A soluble base
4
Q
pH Scale
A
Potential of Hydrogen
1 - 14
5
Q
Litmus Paper
A
A type of paper that changes colour according to the acidity of a solution that it is dipped into and so which can be used to test acidity.
6
Q
Litmus
A
A soluble powder obtained from certain lichens.
7
Q
Red LP turns __ in alkalis
A
Blue
8
Q
Blue LP turns __ in acids
A
Red
9
Q
Blue LP turns __ in alkalis and neutral
A
Blue
10
Q
Red LP turns __ in acids and neutral
A
Re
11
Q
Neutralisation
A
An alkali and and acid can cancel each other out
12
Q
Acid + Metal =
A
Salt + Hydrogen
13
Q
Acid + Carbonate =
A
Water + Salt + Carbon DIoxide
14
Q
Acid + Base =
A
Water + Salt
