Concentrations of Solutions (AQA GCSE Chemistry Combined Science): Flashcards

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Concentrations of Solutions
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What does concentration measure?

How much solute is in a certain volume of solvent

What does high concentration mean?

More solute than in a low concentration solution

Common unit for concentration

Grams per cubic decimetre (g/dm3g/dm^3)

Conversion: 1 dm3dm^3 to cm3cm^3

1000 cm3cm^3

Formula: concentration in g/dm3g/dm^3

MassofSolute(g)VolumeofSolvent(dm3)\frac{Mass of Solute (g)}{Volume of Solvent (dm^3)}

Formula: concentration in mol/dm3mol/dm^3

MolesofSoluteVolumeofSolvent(dm3)\frac{Moles of Solute}{Volume of Solvent (dm^3)}

25g NaCl in 1 dm3dm^3: concentration

25 g/dm3g/dm^3

0.5 mol in 2 dm3dm^3: concentration

0.25 mol/dm3mol/dm^3

When to use g/dm3g/dm^3 units

When mass of solute is known

When to use mol/dm3mol/dm^3 units

When amount of solute in moles is known

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