Chemistry 

Why does diffusion move from high to low concentration?

Michael Wilson

Why does diffusion move from high to low concentration?

The kinetic energy of the molecules results in random motion, causing diffusion. it is the random motion of the molecules that causes them to move from an area of high concentration to an area with a lower concentration. Diffusion will continue until the concentration gradient has been eliminated.

What is meaning of higher concentration?

concentration Add to list Share. A high concentration of a substance in a solution means that there’s a lot of it relative to the volume: the Great Salt Lake has very few fish because of the high concentration of salt. To say that you have good concentration skills means that you pay attention well.

What concentration is considered concentrated?

Concentration Versus Dilution Two related terms are concentrated and dilute. Concentrated refers to chemical solutions that have high concentrations of a large amount of solute in the solution. If a solution is concentrated to the point where no more solute will dissolve in the solvent, it is said to be saturated.

Is there a large amount of solute in a concentrated solution?

A concentrated solution has a large amount of solute. Such a solution is called a solution because it contains the maximum amount of solute that can be dissolved in the solvent at a given temperature. If a solution contains less solute than this maximum amount, it is an unsaturated solution.

How is it possible to dissolve more than the maximum amount of solute?

In some circumstances, it is possible to dissolve more than the maximum amount of a solute in a solution. Usually, this happens by heating the solvent, dissolving more solute than would normally dissolve at regular temperatures, and letting the solution cool down slowly and carefully.

Why the concentrated solution should not be heated for a long time?

The temperature of the mixture of concentrated sulphuric acid and sodium nitrate should not exceed 200oC because sodium sulphate formed at higher temperature forms a hard crust which sticks to the walls of the retort and is difficult to remove. At higher temperature nitric acid may also decompose.

What do you observe when concentrated Sulphuric acid is added to hydrated copper sulphate?

Concentrated Sulphuric acid acts as dehydrating agent and removes the water of crystallisation from hydrated copper sulphate to produce anhydrous copper(II) sulfate. The reaction is reversible. Hydrated copper sulphate is blue in colour. Anhydrous copper sulphate is colourless/white.

Why the reactants should not be heated very strongly above 200oC?

In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitrate should not be heated very strongly, above 200°C because a higher temperature can cause following problems: Sodium sulphate is formed which may stick to the glass and cannot be removed easily.

What is the action of concentrated nitric acid on copper?

A few drops of nitric acid are placed on an older copper penny (and the reaction is shown). Discussion: The reaction produces red-brown nitrogen dioxide gas and a hot, concentrated solution of copper(II) nitrate, which is blue. As the water evaporates and the solution cools, crystals of Cu(NO3)2(s) begin to form.

What property of concentrated Sulphuric acid is used in the action when sugar turns black in its presence?

dehydrating property

What are the properties of concentrated Sulphuric acid?

Concentrated sulphuric acid is non-volatile or has a high boiling point and hence it is used for the preparation of hydrogen chloride and nitric acid. Was this answer helpful?

Biology 

Why does diffusion move from high to low concentration?

Michael Wilson

Why does diffusion move from high to low concentration?

The kinetic energy of the molecules results in random motion, causing diffusion. it is the random motion of the molecules that causes them to move from an area of high concentration to an area with a lower concentration. Diffusion will continue until the concentration gradient has been eliminated.

What moves from low to high concentration?

“In osmosis, water moves from areas of low concentration of solute to areas of high concentration of solute.”

What direction do molecules move during diffusion?

The direction of diffusion is said to be ‘down’ or ‘with’ the concentration gradient. Diffusion stops when the concentration of the substance is equal in both areas. This does not mean that the molecules of substance are not moving any more, just that there is no overall movement in one direction.

What is high concentration and low concentration in diffusion?

A concentration gradient occurs when the concentration of particles is higher in one area than another. In passive transport, particles will diffuse down a concentration gradient, from areas of higher concentration to areas of lower concentration, until they are evenly spaced.

Why is diffusion considered a passive process?

Diffusion is a passive process of transport. Diffusion expends no energy. Rather the different concentrations of materials in different areas are a form of potential energy, and diffusion is the dissipation of that potential energy as materials move down their concentration gradients, from high to low.

What are three types of active transport?

Active Transport is the term used to describe the processes of moving materials through the cell membrane that requires the use of energy. There are three main types of Active Transport: The Sodium-Potassium pump, Exocytosis, and Endocytosis.

What are the two types of facilitated diffusion and how do they differ?

While there are hundreds of different proteins throughout the cell, only two types are found associated with facilitated diffusion: channel proteins and carrier proteins. Carrier proteins transport molecule by changing their shape, or conformation, to move a specific molecule across the membrane.

How do you know if diffusion has occurred?

Diffusion occurs because molecules like to spread out from areas of high concentration to areas of lower concentration. The primary determinant of whether a molecule will diffuse across a cell membrane is the concentration of the molecule on each side of the cell membrane.

Where does diffusion occur in the body?

The diffusion of chemicals and gases in and out of cells is an essential activity in human organs. Diffusion of oxygen and carbon dioxide gas occurs in the lungs. Diffusion of water, salts, and waste products occurs in the kidneys. Diffusion of calcium from food into cells occurs in the intestines.

How long does diffusion last?

How long does diffusion last? Until it reaches equilibrium, when there is an equal amount of the substance distributed everywhere.

Is diffusion time directly proportional to distance?

Well, that means time to diffuse is NOT directly proportional to distance.

How do you find time of diffusion?

The time for diffusion is linear in y/x for 3 dimensions; proportional to log(y/x) for 2 dimensions; and independent of y/x for 1 dimension. For example, when y/x = 0.1 (e.g., target diameter 1 nm, diffusion distance 10 nm), q3 = 0.35 and q2 = 1.22.

How many hours will it take for a motor protein to transport another molecule a distance of 1 meter?

28 hours

What proteins allow a cell to keep its shape?

The cytoskeleton of a cell is made up of microtubules, actin filaments, and intermediate filaments. These structures give the cell its shape and help organize the cell’s parts. In addition, they provide a basis for movement and cell division.

What are the three domains of a motor protein?

All consist of a highly conserved head (motor) domain, which is an actin-activated ATPase responsible for generating movement; a neck domain, which is associated with several regulatory light-chain subunits; and an effector tail domain, which is unique to each type of myosin and determines its specific functions in …

How fast do proteins move?

20 miles per hour