Paper 1 H - SAMPLE SET 1 Q20
20) An investigation is done to investigate osmosis in potatoes.
Three chips are cut from a potato.
Each chip is 5.0 cm long.
Each chip is left in a different concentration of sucrose solution for two hours.
Three chips are cut from a potato.
Each chip is 5.0 cm long.
Each chip is left in a different concentration of sucrose solution for two hours.
These are the results after two hours:
(a) Explain why the chip in the 0.0M solution increased in length. [2]
(b) Explain why the chip in the 0.5M solution stayed the same length. [2]
(c) (i) Calculate the percentage change in length of the chip in the 1.0M solution. [2]
(b) Explain why the chip in the 0.5M solution stayed the same length. [2]
(c) (i) Calculate the percentage change in length of the chip in the 1.0M solution. [2]
answer = ……………………….%
(ii) In experiments like this, what is the advantage of calculating percentage change, not just the actual change? [1]
(d) (i) Measuring the length of the chips is a quick and easy way to get results but it does not measure the total change to the chips.
Explain why. [1]
(ii) What could the students measure to see the total change to the chips? [1]
(Total for Question 20 = 9 marks)
(d) (i) Measuring the length of the chips is a quick and easy way to get results but it does not measure the total change to the chips.
Explain why. [1]
(ii) What could the students measure to see the total change to the chips? [1]
(Total for Question 20 = 9 marks)