Every GCSE Chemistry equation in one place, rearranging them, and choosing the right one.
What you will learn
- Recall the GCSE Chemistry equations with their units
- Rearrange them
- Choose which one a question needs
All of them, with units
GCSE Chemistry papers give a periodic table but no equation sheet, so these are learnt.
| Quantity | Equation | Units |
|---|---|---|
| moles | n = mass ÷ Mr | mol, g |
| concentration | mass ÷ volume, or moles ÷ volume | g/dm³, mol/dm³ |
| gas volume at RTP (Higher, Chemistry only) | volume = moles × 24 | dm³ |
| percentage yield (Chemistry only) | actual ÷ theoretical × 100 | % |
| atom economy (Chemistry only) | Mr of useful product ÷ total Mr of reactants × 100 | % |
| mean rate | quantity ÷ time | g/s, cm³/s, mol/s |
| Rf | distance moved by substance ÷ distance moved by solvent | none |
The rest of this lesson and its 11 practice questions are locked.
In this lesson
- All of them, with units
- Rearranging an equation
- Try it: Check an Mr
11 practice questions, marked as you go; about 20 minutes in all.
In this unit: Required practicals and maths skills
The skills behind every chemistry practical and calculation: units, uncertainty, titrations, graphs, the equations and planning.