A technician finds 0.036 mol of potassium iodide in 300 cm3 of solution. The technician records the concentration as 1.2 mol dm−31.2\,\mathrm{mol\,dm^{-3}}1.2moldm−3.
Which value should be recorded for the concentration instead?
0.00012 mol dm−30.00012\,\mathrm{mol\,dm^{-3}}0.00012moldm−3
0.012 mol dm−30.012\,\mathrm{mol\,dm^{-3}}0.012moldm−3
0.12 mol dm−30.12\,\mathrm{mol\,dm^{-3}}0.12moldm−3
120 mol dm−3120\,\mathrm{mol\,dm^{-3}}120moldm−3
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.