0 0
Home Revision Notes Free Quiz Courses Teachers Blog My Account Cart
Edexcel A Level Chemistry

Calculations with Solutions and Gases

Calculations with solutions and gases connect the mole concept to measurable laboratory quantities. These pages build from calculating gas volumes, through using concentration in mol dm−3, to interpreting very small concentrations expressed in parts per million.

Exam Paper
Paper 1
9CH0/01
Specification Points
5.5 – 5.11
5 points covered
Sub-topics
3 lessons
Revision notes available
Exam Board
Edexcel
Pearson 9CH0

Revision Notes

Gas volume
Molar
Volume
gas volume and amount in moles
1

Molar Volume Calculations

Revise how the amount of gas in moles links to gas volume, including the use of molar gas volume in calculations.

Start revising
Solution concentration
Solution
Concentration
amount, volume and concentration
2

Concentrations of Solutions

Practise using concentration, volume and amount of substance in mol dm−3 calculations.

Start revising
Volumetric analysis
Titration
Calculations
concentration, volume and mole ratios
3

Titration Calculations

Use concentration, volume and balanced equation ratios to calculate unknown concentrations from titration data.

Start revising

Summary map

Download, print and revise the key facts of this topic at a glance.

Summary map · PDF

Solutions, Gases and Titrations Map

Edexcel A Level Chemistry · Topic 5 Formulae, Equations and Amounts of Substance · Calculations with Solutions and Gases

The whole section on one A4 page: concentration, standard solutions, titrations and indicators, molar volume, pV = nRT and Core Practical 1.

Download the map6 key ideas + a units table · A4 portrait · print ready

© 2026 Online Learning System. For personal study: printing is allowed; editing, copying and redistribution are not.

Specification Coverage

Calculations with Solutions and Gases – Edexcel A Level Chemistry

The following specification points outline the knowledge and skills students are expected to demonstrate for Topic 5. Ideas from this topic are applied across quantitative chemistry, practical work and later physical, inorganic and organic topics.

Chemical Language and Formulae

5.5
be able to use experimental data to calculate empirical formulae and molecular formulae, including the use of pV = nRT for gases and volatile liquids.
i
empirical formulae
ii
molecular formulae including the use of pV = nRT for gases and volatile liquids
Calculations of empirical formula may involve composition by mass or percentage composition by mass data.

The Mole and Core Calculations

5.7
be able to calculate amounts of substances, in mol, in reactions involving mass, volume of gas, volume of solution and concentration. These calculations may involve reactants and/or products.
5.9
be able to calculate reacting volumes of gases from chemical equations, and vice versa, using the concepts of amount of substance
5.10
be able to calculate reacting volumes of gases from chemical equations, and vice versa, using the concepts of molar volume of gases. Core Practical 1: measure the molar volume of a gas.
5.11
be able to calculate solution concentrations, in mol dm-3 and g dm-3, including simple acid-base titrations using a range of acids, alkalis and indicators. The use of both phenolphthalein and methyl orange as indicators will be expected.