The rate of diffusion is determined by several factors including the concentration gradient the diffusion coefficient and the membrane permeability.

The concentration gradient is the difference in concentration between two areas. The greater the difference in concentration the greater the gradient and the faster the diffusion.

The diffusion coefficient is a measure of how easily a substance diffuses. The higher the diffusion coefficient the faster the diffusion.

The membrane permeability is a measure of how easily a substance passes through the cell membrane. The higher the permeability the faster the diffusion.

## What is diffusion?

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.

## What are the factors that affect the rate of diffusion?

The four main factors that affect the rate of diffusion are concentration gradient temperature molecular weight and solubility.

## What is the concentration gradient?

The concentration gradient is the difference in concentration of a substance between two areas.

## What is the solubility of a substance?

The solubility of a substance is the amount of that substance that can be dissolved in a given solvent.

## What is the molecular weight of a substance?

The molecular weight of a substance is the sum of the atomic weights of all the atoms in a molecule of that substance.

## What is the temperature?

The temperature is a measure of the average kinetic energy of the particles in a sample of matter.

## What is the equation for diffusion?

The equation for diffusion is: D= (RT)/(MW)

## What is R in the diffusion equation?

R is the molar gas constant.

## What is T in the diffusion equation?

T is the temperature in Kelvin.

## What is MW in the diffusion equation?

MW is the molecular weight.

## What is the unit of diffusion?

The unit of diffusion is the square root of area.

## What is the definition of area?

Area is the two-dimensional measure of the extent of a surface.

## How do you calculate the area of a circle?

The area of a circle is calculated by multiplying the radius of the circle by itself and then multiplying that number by pi.

## How do you calculate the radius of a circle?

The radius of a circle is calculated by dividing the circumference of the circle by pi.

## What is the circumference of a circle?

The circumference of a circle is calculated by multiplying the diameter of the circle by pi.