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

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Using Concentrations in mol/dm3
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What does concentration measure in a solution?

Amount of solute in a volume of solvent

What is a solute?

The substance being dissolved

What is a solvent?

The liquid in which solute dissolves

What does concentration in g/dm3\text{g/dm}^3 tell us?

Grams of solute per dm³ of solution

What does concentration in mol/dm3\text{mol/dm}^3 tell us?

Moles of solute per dm³ of solution

What is Avogadro's number?

6.02×10236.02 \times 10^{23} particles

What is the concentration of 22 mol in 500500 dm3\text{dm}^3?

0.0040.004 mol/dm³

Which formula converts mass to moles?

Moles=MassMr\text{Moles} = \frac{\text{Mass}}{M_r}

What is the MrM_r of KCl if K==39 and Cl==35.5?

74.574.5

What are the moles of KCl if 100100 g dissolves and Mr=74.5M_r = 74.5?

1.341.34 mol

What is the concentration if 1.341.34 mol is in 200200 dm3\text{dm}^3?

0.00670.0067 mol/dm³

Which formula relates two reacting solutions?

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

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