BI-386
Diffusion
Biology · Secondary 3 · Hard · Diffusion
A cube of agar jelly containing a pH indicator is cut into three sizes: 1 cm, 2 cm and 3 cm cubes. All are placed into the same acid solution. Which cube will take the longest time to be fully changed in colour, and why?
- 1 cm cube, because it has the largest volume
- 1 cm cube, because it has the smallest surface area
- 3 cm cube, because it has the largest volume
- 3 cm cube, because it has the smallest surface area to volume ratio
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