A student adds a drop of ink to a glass of cold water. What will the student observe to happen to the drop of ink?
The ink will diffuse.
This is because the ink particles will move from where there's a higher concentration (the drop of ink) to where there is a lower concentration. (surrounding water).
Describe how the temperature, concentration gradient and surface area affect the rate of diffusion.
Temperature – Rate of diffusion increases with increasing temperature because the particles have more kinetic energy so move around faster.
Concentration gradient – The bigger the difference in the concentrations between each area, the faster the rate of diffusion.
Surface area – the larger the surface area the faster the rate of diffusion because more particles can pass through at once.
