A supplier checks the labels on four batches of magnesium sulfate solution. Each batch was made using the mass and final volume shown.
(Mr M_r\,Mr of magnesium sulfate = 120)
| Batch | Mass of magnesium sulfate / g\mathrm{g}g | Final volume / cm3\mathrm{cm^3}cm3 | Concentration on label / mol dm−3\mathrm{mol\,dm^{-3}}moldm−3 |
|---|---|---|---|
| A | 6.00 | 250 | 0.0500 |
| B | 3.60 | 300 | 0.100 |
| C | 4.80 | 400 | 0.000100 |
| D | 1.20 | 100 | 12.0 |
Which batch has been labelled correctly?
Batch A
Batch C
Batch D
Batch B
151 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.