A technician transfers a sample of glucose stock solution to a volumetric flask and adds distilled water to the mark.
Complete the quality-control record.
| Measurement | Value |
|---|---|
| Volume of stock solution transferred | 20.0 cm320.0\,\mathrm{cm^{3}}20.0cm3 |
| Final volume after adding water | 500 cm3500\,\mathrm{cm^{3}}500cm3 |
| Concentration after adding water | 0.0180 mol dm−30.0180\,\mathrm{mol\,dm^{-3}}0.0180moldm−3 |
| Mr M_r\,Mr of glucose | 180 |
| Concentration of the stock solution | X mol dm−3X\,\mathrm{mol\,dm^{-3}}Xmoldm−3 |
| Mass concentration of the stock solution | Y g dm−3Y\,\mathrm{g\,dm^{-3}}Ygdm−3 |
Calculate the values of X X\,X and YYY.
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.