Paper 2 H - SAMPLE SET 1 Q2
2) A student used chromatography to identify the pigments in spinach leaves.
She used propanone as a solvent.
Figure 2 shows the student’s results.
She used propanone as a solvent.
Figure 2 shows the student’s results.
2.1) Name the mobile phase and the stationary phase in the student’s experiment. [2 marks]
Mobile phase _____________________________
Stationary phase ___________________________
2.2) What does Figure 2 tell you about the green pigment from spinach? [3 marks]
2.3) Write the equation that links distance moved by solvent, distance moved by solute and Rf value. [1 mark]
2.4) Use Figure 2 to calculate the Rf value for pigment B. [3 marks]
Mobile phase _____________________________
Stationary phase ___________________________
2.2) What does Figure 2 tell you about the green pigment from spinach? [3 marks]
2.3) Write the equation that links distance moved by solvent, distance moved by solute and Rf value. [1 mark]
2.4) Use Figure 2 to calculate the Rf value for pigment B. [3 marks]
Rf value = __________________
2.5) Another student set up the apparatus shown in Figure 3.
This student did not set up the apparatus correctly.
Identify the errors the student made.
Explain how the errors she made would affect her results. [4 marks]
(Total for Question 2 = 13 marks)
Identify the errors the student made.
Explain how the errors she made would affect her results. [4 marks]
(Total for Question 2 = 13 marks)