Concentrations of Solutions (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards

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Concentrations of Solutions
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Concentration definition

How much solute in a certain volume of solvent

Solute definition

Substance that is dissolved

Solvent definition

Liquid that substances are dissolved in

High concentration meaning

More solute than a low concentration solution

Standard unit for concentration

Grams per cubic decimetre (g/dm³)

1 dm³ in cm³

1000 cm³

Formula: concentration in g/dm³

Mass (g)Volume (dm3)\frac{\text{Mass (g)}}{\text{Volume (dm}^3\text{)}}

Formula: concentration in mol/dm³

MolesVolume (dm3)\frac{\text{Moles}}{\text{Volume (dm}^3\text{)}}

When to use g/dm³ for concentration

When mass of solute is known

When to use mol/dm³ for concentration

When amount of solute measured in moles

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