#### Diffusion rate equation

## What is the formula for rate of diffusion?

(volume or number of moles per unit time). Rate_{2} is the rate of effusion for the second gas. M_{2} is the molar mass of gas 2. Graham’s law states that the rate of diffusion or of effusion of a gas is inversely proportional to the square root of its molecular weight.

## What is Fick’s Law of Diffusion equation?

It states that ‘the rate of diffusion is proportional to both the surface area and concentration difference and is inversely proportional to the thickness of the membrane’. Fick’s law can be written as: Rate of diffusion ∝ surface area × concentration difference thickness of membrane. ∝ means ‘is proportional to’.

## What is the rate of diffusion?

The rate of diffusion, dn/dt, is the change in the number of diffusing molecules inside the cell over time. Since the net movement of diffusing molecules depends on the concentration gradient, the rate of diffusion is directly proportional to the concentration gradient (dC/dx) across the membrane.

## How do I calculate a rate?

However, it’s easier to use a handy formula: rate equals distance divided by time: r = d/t. Actually, this formula comes directly from the proportion calculation — it’s just that one multiplication step has already been done for you, so it’s a shortcut to learn the formula and use it.

## What are the 3 factors that affect the rate of diffusion?

Several factors affect the rate of diffusion of a solute including the mass of the solute, the temperature of the environment, the solvent density, and the distance traveled.

## What are the 3 types of diffusion?

Simple diffusion, osmosis and facilitated diffusion.

## What does Fick’s law state?

Fick’s law states that the rate of transfer of molecules or atoms by diffusion through a unit area is proportional to concentration gradient.

## How does pressure affect diffusion rate?

As with any chemical reaction, increasing the temperature or pressure increases the kinetic energy of the particles, thus increasing the rate of diffusion. Concentration Gradient: The greater the concentration gradient (the difference in concentration either side of the membrane) the greater the rate of diffusion.

## What’s an example of diffusion?

Perfume is sprayed in one part of a room, yet soon it diffuses so that you can smell it everywhere. A drop of food coloring diffuses throughout the water in a glass so that, eventually, the entire glass will be colored.

## Which factor does not affect the rate of diffusion?

Answer and Explanation: Of the following factors, the presence of other solutes in a solution does not affect the diffusion of a particular substance or solute. Temperature

## What does not affect the rate of simple diffusion?

In passive transport, substances simply move from an area of higher concentration to an area of lower concentration, which does not require the input of energy. Concentration gradient, size of the particles that are diffusing, and temperature of the system affect the rate of diffusion.

## What is the formula for distance?

To solve for distance use the formula for distance d = st, or distance equals speed times time.

## Is percentage a rate?

“Rate” simply means the number of things per some other number, usually 100 or 1,000 or some other multiple of 10. A percentage is a rate per 100.