Chemistry › Section C · Composition of substances and solutions › Topic C.3
Molarity
Most laboratory reactions, and nearly all the chemistry in living things, happen in solution. Molarity tells you how many moles of a substance are packed into each litre, so you can measure out a known amount of it simply by measuring a volume.
In this topic
- Why measure by volume?
- Solutions: the vocabulary
- Defining molarity
- Making a solution properly
- Worked example: concentration from a mass
- Rearranging the definition
- Worked example: weighing out a solute
- Dilution
- Worked example: preparing a dilute acid
- Common mistakes to avoid
- Key takeaways
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