Chemistry·Stoichiometry · NSSCO 4.2
Mole calculations
Narrated lesson · press play
Now put the mole to work. Calculate reacting masses from a balanced equation, use concentration and volume of solutions, find gas volumes with the 24 dm³ molar volume, work out empirical and molecular formulae, and calculate percentage composition, yield and purity.
What you'll learn in this lesson
By the end you should be able to (NSSCO Chemistry 4.2):
- Calculate stoichiometric reacting masses of pure substances
- Carry out calculations involving concentrations and volumes of solutions (g/dm³ or mol/dm³; limiting reactants may be set)
- Use the molar gas volume, taken as 24 dm³ at rtp, in calculations of reacting masses and gas volumes
- Calculate empirical formulae using composition-by-mass data
- Use empirical formulae and Mr to calculate molecular formulae
- Calculate percentage composition, percentage yield and percentage purity
Loading your lesson…
You're watching a free 3-minute preview — create a free account to keep going.
Quick revision
Revise this in 5 minutes
Miss Rachel and Mike talk through the whole topic — with the figure and working drawn live.