Question detail
Calculate the mass of solute in grams when the concentration of a solution is 2.5 mol/dm3 and the volume is 0.5 dm3. Use the molar mass of the solute as 58.5 g/mol.
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At a glance
Question
Type
exam_style
Style
Topic
Using concentrations of solutions in mol/dm3 (chemistry only) (HT only)
Question
Calculate the mass of solute in grams when the concentration of a solution is 2.5 mol/dm3 and the volume is 0.5 dm3. Use the molar mass of the solute as 58.5 g/mol.
Answer
The answer is 28.75 g.
Explanation
This uses Moles From Mass because the objective is about (chemistry only) (HT only) Substitute numerical values into algebraic equations using appropriate units. (MS 3c). The reasoning belongs to Concentrations in mol/dm3 and titration calculations within Using concentrations of solutions in mol/dm3 (chemistry only) (HT only), so it should not be confused with nearby quantitative ideas such as mass, moles, concentration, yield, atom economy, or gas volume unless those are named in the objective. Use the focus term chemistry only to keep the answer aligned with AQA GCSE Chemistry 8462 Unit 4.3.
Common mistake
Incorrect Unit Conversion
Students often forget to convert volumes from cm3 to dm3 when substituting into concentration equations.
Always convert cm3 to dm3 by dividing by 1000 before using the volume in calculations.
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