pH scale Flashcards
1
Q
what do acids produce in aqueous solutions?
A
hydrogen ions (H + )
2
Q
what do alkalis produce in aqueous solutions?
A
hydroxide ions (OH - ).
3
Q
what its the pH scale?
A
From 0-14, is a measure of the acidity or alkalinity of a solution.
4
Q
how can pH be measured?
A
using universal indicator or a pH probe.
5
Q
when is a solution neutral?
A
when pH is 7
6
Q
what are the pH of acids?
A
less than 7.
7
Q
what are the pH of alkalis?
A
greater than 7
8
Q
what happens when acids and alkalis react?
A
the hydrogen ions and the hydroxide ions neutralise each other.
