Describe4 marksStandard
A student prepared agar cubes containing phenolphthalein indicator. The cubes had side lengths of 1 cm, 2 cm, and 3 cm. They were placed in dilute hydrochloric acid, which diffuses into the agar and turns the indicator colourless. After 5 minutes, the student measured how far the acid had diffused into each cube.
Describe how the surface area to volume ratio changes as the cube side length increases and explain how this affects the rate of diffusion of the acid into the cubes.