Using Concentrations in mol/dm3 (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards

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Using Concentrations in mol/dm3
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Definition of concentration

Measure of solute in a given volume of solvent

Solute

Substance being dissolved

Solvent

Liquid in which solute is dissolved

Units for concentration

g/dm3\text{g/dm}^3 and mol/dm3\text{mol/dm}^3

Meaning of mol/dm3\text{mol/dm}^3

Moles of solute per dm3\text{dm}^3 of solution

What a mole represents

Specific number of particles (6.02×10236.02 \times 10^{23})

Avogadro's number

6.02×10236.02 \times 10^{23} particles

Formula for concentration (mol/dm³)

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

Formula: mass to moles

Mass (g)Mr\frac{\text{Mass (g)}}{M_r}

MrM_r meaning

Relative Formula Mass

Formula for two reacting solutions

C1×V1=C2×V2C_1 \times V_1 = C_2 \times V_2

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