5.4.2.4 The pH Scale and Neutralisation Flashcards
1
Q
What do acids produce in aqueous solutions?
A
- hydrogen ions
- H+
2
Q
What do aqueous solutions of alkalis contain?
A
- hydroxide ions
- OH-
3
Q
What is the pH scale?
A
- 0-14
- measure of acidity or alkalinity of a solution
4
Q
How can the acidity or alkalinity of a solution be measured?
A
- universal indicator
- pH probe
5
Q
What is a solution with pH 7?
A
- neutral
6
Q
What pH do aqueous solutions of acids have?
A
- less than 7
7
Q
What pH do aqueous solutions of alkalis have?
A
- greater than 7
8
Q
What happens in a neutralisation reaction between an acid and an alkali?
A
- hydrogen ions react with hydroxide ions to produce water
9
Q
How can the neutralisation reaction between an acid and an alkali be represented?
A
- H+ (aq) + OH-(aq) -> H2O(l)
