Concentration of Solutions (AQA GCSE Chemistry): Quizzes

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

How much solute in a given volume

What is the solute in a solution?

The substance being dissolved

What is the solvent in a solution?

The liquid in which solute dissolves

Which unit tells us moles of solute per dm3dm^3 of solution?

mol/dm3mol/dm^3

What is Avogadro's number?

6.02×10236.02 \times 10^{23} particles

What is the formula for concentration in mol/dm3mol/dm^3?

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

If 22 moles of MgSO4MgSO_4 are in 500500 dm3dm^3 of water, what is the concentration?

0.0040.004 mol/dm3mol/dm^3

What formula converts mass to moles?

Moles=Mass(g)MrMoles = \frac{Mass (g)}{Mr}

What is the MrMr of KClKCl if K=39K=39 and Cl=35.5Cl=35.5?

74.574.5

If 100g100g of KClKCl (Mr=74.5)(Mr=74.5) is in 200200 dm3dm^3, what is the concentration in mol/dm3mol/dm^3?

0.00670.0067 mol/dm3mol/dm^3

What formula relates two reacting solutions?

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

If C1=1C_1=1 mol/dm3mol/dm^3, V1=500V_1=500 cm3cm^3, V2=350V_2=350 cm3cm^3, what is C2C_2?

1.431.43 mol/dm3mol/dm^3

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