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Solutions and Concentrations

The mole concentration of a solution is the amount of solute in moles dissolved in each 1 dm3.
A 0.2moldm-3 solution has 0.2 moles of solute dissolved in 1 dm3 of solution.
The mass concentration of a solution is the mass of solute in grams dissolved in each 1 dm3.
A 0.2gdm-3 solution has 0.2 g of solute dissolved in 1 dm3 of solution.
moles = concentration (moldm-3) x volume (dm3)

n = C V


To convert from moldm-3 to gdm-3 multiply by the Mr.

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Specification: OCR Chemistry A (H032), AS-level, 2.1.3 Amount of substance. Topic: Amount of Substance.

Key terms in this lesson

Mole
The amount of substance that contains as many particles as there are atoms in exactly 12g of carbon-12.

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