Osmosis Practical

Question 1

Independent variable

Osmosis

Answer 1

Concentration of sugar or salt

Question 2

Dependent variable

Osmosis

Answer 2

Mass of potatoes

Question 3

control variable

Osmosis

Answer 3

surface area
time
temperature

Question 4

experiment

Osmosis

Answer 4

cut 3 potatoes into cylinders
use a ruler to make sure they are all around the same size
measure starting mass of each
one is put in pure water
one in concentrated solution eg 1 mol/dm^3
one in a different concentration in betweeen
leave for a day
pat dry with paper towel and measure final masses
calculate percentage change in mass then plot graphs