Osmosis Investigation

Biology · Practical
Potato core in test tube for osmosis experiment

📘 Experimental Setup

A cylindrical potato core (10 mm diameter, 30 mm long) is cut from a fresh tuber and its initial mass measured on a 3-decimal-place balance (± 0.0005 g). The core is then immersed in a test tube containing 25 mL of solution of known concentration and held at a chosen temperature for a chosen time.

At the end of the immersion period, the core is removed, gently blotted dry with a paper towel to remove surface liquid, and re-weighed to determine the final mass.

1

Choose your Independent Variable

Select which variable you will change while keeping all others constant.

Solute Concentration
Time of Immersion
Temperature
2

Set your Control Variables

Choose values for every variable except your IV. These must stay the same across all trials.

0.00 mol/dm³ 0.20 mol/dm³ 1.00 mol/dm³
15 min 60 min 24 h
Steps: 15, 30, 60, 180, 360, 720, 1440 min
0 °C 20 °C 50 °C
3

Lock Controls & Run Trials

Lock your control variables, then change the IV and generate 5 trials for each value.

Select an Independent Variable to begin.
4

Results

0 IV values measured · mass uncertainty ± 0.0005 g

Independent
Variable		 Trial 1 Trial 2 Trial 3 Trial 4 Trial 5
Initial (g)Final (g) Initial (g)Final (g) Initial (g)Final (g) Initial (g)Final (g) Initial (g)Final (g)
No trials yet — lock control variables, set the IV, and click "Generate Results".