A-LevelBiologyBiological molecules9700/12 · May/June 2018 · Q61 Mark
A student was asked to estimate the concentration of glucose in a solution using the Benedict's test. The student was provided with a 1.0 mol dm⁻³ glucose solution and was told to make a 0.6 mol dm⁻³ solution by proportional dilution. Which row shows the correct volumes of both 1.0 mol dm⁻³ glucose solution and distilled water needed to make the 0.6 mol dm⁻³ solution?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Avolume of 1.0 mol dm⁻³ glucose solution/cm³ 12, volume of distilled water/cm³ 8
Bvolume of 1.0 mol dm⁻³ glucose solution/cm³ 10, volume of distilled water/cm³ 10
Cvolume of 1.0 mol dm⁻³ glucose solution/cm³ 8, volume of distilled water/cm³ 12
Dvolume of 1.0 mol dm⁻³ glucose solution/cm³ 6, volume of distilled water/cm³ 14
✓ Correct answer
A: volume of 1.0 mol dm⁻³ glucose solution/cm³ 12, volume of distilled water/cm³ 8
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Biological molecules and see which topics are most likely to come up next.
Sign up free →