Paper 2 H - SAMPLE SET 1 Q8
8) A student investigated the effect of light intensity on the rate of photosynthesis in pondweed.
8.1) The formula for glucose is C6H12O6
Use the formula for glucose to write the balanced symbol equation for photosynthesis. [2 marks]
Figure 8 shows the apparatus the student used.
8.1) The formula for glucose is C6H12O6
Use the formula for glucose to write the balanced symbol equation for photosynthesis. [2 marks]
Figure 8 shows the apparatus the student used.
The student altered the distance of the lamp from the pondweed and counted the number of bubbles produced in 30 seconds for each distance.
Table 5 shows the student’s results.
Table 5 shows the student’s results.
8.2) Use the data in Table 5 to complete the graph on Figure 9. [3 marks]
8.3) The student concluded that the rate of photosynthesis is inversely proportional to the distance of the lamp from the pondweed.
Does the student’s data support this conclusion?
Use data from Figure 9 to justify your answer. [3 marks]
8.4) The volume of one bubble can be calculated using the equation:
Does the student’s data support this conclusion?
Use data from Figure 9 to justify your answer. [3 marks]
8.4) The volume of one bubble can be calculated using the equation:
V = 4/3 πr3
The radius of one bubble is 0.1 cm.
The value for π is 3.14
Use data from Table 5 and the information above to calculate the rate of gas production at a distance of 40 cm.
Give your answer in standard form to three significant figures.
[5 marks]
Rate of reaction = _________________ cm3 per minute
(Total for Question 8 = 13 marks)