In this investigation, the concentration of glucose in the distilled water was measured at the start and then every five minutes - Edexcel - GCSE Biology - Question 5 - 2013 - Paper 1

The results indicate that the concentration of glucose in the distilled water increased over time. Initially, at 0 minutes, the concentration was 0.00 g cm³, which remained the same at the 5-minute mark. However, from 10 minutes onwards, the concentration started to rise, reaching 0.39 g cm³ at 10 minutes.

By 15 minutes, the glucose concentration further increased to 0.59 g cm³. This trend continued as the concentration hit 0.79 g cm³ at both the 20 and 25-minute marks, suggesting that glucose was steadily diffusing from the visking tubing into the surrounding distilled water as the time progressed.