Changing the concentration of the reactants
1 mark · NormalWhich of the following is the concentration (in mol/dm³) of a solution made by mixing 6.0 cm³ of 2.00 mol/dm³ hydrochloric acid with 19.0 cm³ of distilled water to make a total of 25.0 cm³?
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Correct option: 0.48 mol/dm³
Common mistakes: Using water volume instead of acid volume
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Marking points
A1 · 1 mark · Correct answer: 0.48 mol/dm³
Worked solution
Concentration = (6.0 / 25.0) × 2.00 = 0.48 mol/dm³. The correct answer is 0.48 mol/dm³.