CP3 Practical - Beetroot Permeability

Question 1

How is permeability affected?

Answer 1

Temperature alcohol concentrations

Question 2

How do you carry out the practical?

Answer 2

Cut 5 prices of beetroot with a scalpel and rinse to release any pigment when cutting
Place 5cm3 of water into 5 test tubes using a measuring cylinder
Place the test tubes in different water baths - 10,20,30,40,50 for 5 mins
Place beetroot into test tubes and leave for 5 mins
Remove beetroot and leave the coloured water in test tubes

Question 3

How do you use a colourimeter to measure absorbency by beetroot?

Answer 3

Switch colorimeter on and switch to correct controls
Place your control water sample into a cuvette using a pipette into colorimeter
Record absorbable of it and repeat for the other 4 different coloured pigments
Record and analyse results