Three cylinders of carrot were cut to equal lengths. One cylinder was placed in distilled water, and the other two cylinders were placed in sodium chloride (NaCl) solutions of different concentrations.
The cylinders were left in the solutions for 45 minutes.
The table below shows the student's results.
| Solution | Starting mass in grams | Final mass in grams |
|---|---|---|
| Distilled water | 3.40 | 3.62 |
| 0.15 mol/dm³ NaCl solution | 3.45 | 3.51 |
| 0.60 mol/dm³ NaCl solution | 3.42 | 3.12 |
Give one way the student could ensure that the measurements of the final mass of the carrot cylinders are accurate.
