Chemistry 

What molecules move from high to low concentration?

Michael Wilson

What molecules move from high to low concentration?

Diffusion. During diffusion, substances move from an area of high concentration to an area of low concentration, until the concentration becomes equal throughout a space. Image showing the process of diffusion across the plasma membrane. Initially, the concentration of molecules is higher on the outside.

Which transport protein moves molecules from low to high concentration?

Active transport is not the same as facilitated diffusion. Both active transport and facilitated diffusion do use proteins to assist in transport. However, active transport works against the concentration gradient, moving substances from areas of low concentration to areas of high concentration.

What is the movement of particles from low to high concentration across a membrane?

Osmosis is the movement of water across a membrane from an area of low solute concentration to an area of high solute concentration.

When the concentration of water is the same on both sides of a membrane there is no net movement?

Movement of water and ions results from diffusion, the random motion of substances. Even when the concentration of all molecules is the same on the two sides, diffusion still occurs, but there is no net movement of water molecules or ions.

What happens when the concentration of a solute is equal on both sides of a plasma membrane?

the concentration of solute is the same on both sides of a membrane, and the cell volume will not change. the solute concentration is lower on the outside of the cell, causing the water molecules to move into the cell.

Why does water move from low to high solute concentration?

“In osmosis, water moves from areas of low concentration of solute to areas of high concentration of solute.” So osmosis only occurs with a semipermeable membrane, and even with the membrane some water will move both sides. MORE water will move up the concentration gradient, thus there is a net flow up the gradient.

When the concentration of solute inside and outside a cell is the same the cell has reached?

10th grade Biology – 7-3 Cell Boundaries

A B
when the concentration of the solute is the SAME throughout a system, the system has reached equilibrium
particles tend to move from an area where they are MORE concentrated to an area where they are LESS concentrated, is a process of diffusion

When the concentration of molecules is equal inside and outside the cell what direction does water move?

Water will move in the direction where there is a high concentration of solute (and hence a lower concentration of water. Salt is a solute, when it is concentrated inside or outside the cell, it will draw the water in its direction.

Which type of solution has the highest concentration?

Hypertonic solution

What is concentration equal to?

The molar concentration (M) of a solution is defined as the number of moles of solute (n) per liter of solution (i.e, the volume, Vsolution): M=nVsolution.

How do you know if a solution has a high concentration?

A solution with a high concentration of hydrogen ions ( H+) is an acid or an acidic solution. The higher the concentration of hydrogen ions (measured in mol/l or moles per litre) the stronger the acidity of the solution. This is usually measured in pH values calculating pH as −log[H+] .

What are 3 ways to measure the concentration of a solution?

It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams …

What do you mean by concentration of a solution?

The concentration of a substance is the quantity of solute present in a given quantity of solution. Concentrations are usually expressed in terms of molarity, defined as the number of moles of solute in 1 L of solution.

Which expression could represent the concentration of a solution?

There are a couple of ways in which you can express the concentration of a solution, and here they are: gram per liter (g/L), molarity (M), parts per million (ppm.), and percents (%).

Which unit can be used to express the concentration of a solution?

Molarity

What is the molarity of a solution containing 20 grams of NaOH?

Number of moles of solute is expressed as ratio of given mass of solute to the molar mass of the same. Thus, Number of moles of NaOH = 20gm40gm/mol = 0.5 moles. Therefore, 20 gm NaOH dissolved in 500 ml of solution has 1M of molarity.

What is the concentration of an aqueous solution?

Solution Concentration. An aqueous solution consists of at least two components, the solvent (water) and the solute (the stuff dissolved in the water). Usually one wants to keep track of the amount of the solute dissolved in the solution. We call this the concentrations.

What is the relationship between the concentration of particles in a solution?

Answer: As solute concentration increases, vapor pressure decreases. Step-by-step explanation: As solute concentration increases, the number of solute particles at the surface of the solution increases, so the number of solvent particles at the surface decreases.

How do you know if it is an aqueous solution?

An aqueous solution is water that contains one or more dissolved substance. The dissolved substances in an aqueous solution may be solids, gases, or other liquids. In order to be a true solution, a mixture must be stable.

What are the examples of non aqueous solution?

A non-aqueous solution is a solution in which water is not the solvent. Examples of non-aqueous solutions are solutions used in dry cleaning (a solution of ethene in the solvent dichloromethane). A solid solution is a solution in which a solid is the solvent.

Which of the following is an aqua solution?

Aqueous solution is a solution in which the solvent is water. Was this answer helpful?

What is an aqueous solution give two examples?

A substance will form an aqueous solution or not, it depends on the nature of its chemical bonds. Some examples of aqueous solutions are cola, saltwater, rain, acid solutions, base solutions, salt solutions, etc. Some examples of solutions that are not aqueous solutions include any liquid that does not contain water.

What are the three types of aqueous solution?

There are three main types of aqueous reactions: precipitation reactions, acid-base reactions, and oxidation-reduction (or redox) reactions.

Why water is not used in non aqueous titration?

Non Aqueous Titration Theory The need for non-aqueous titration arises because water can behave as a weak base and a weak acid as well, and can hence compete in proton acceptance or proton donation with other weak acids and bases dissolved in it.

Why is water considered to be a universal solvent But oil is not?

Why Water Isn’t Really a Universal Solvent But, it isn’t a universal solvent because it can’t dissolve hydrophobic or nonpolar molecules, such as fats, oils, some hydroxides, and most metal oxides, silicates, and sulfides.

Biology 

What molecules move from high to low concentration?

Michael Wilson

What molecules move from high to low concentration?

Diffusion. During diffusion, substances move from an area of high concentration to an area of low concentration, until the concentration becomes equal throughout a space. Image showing the process of diffusion across the plasma membrane. Initially, the concentration of molecules is higher on the outside.

What does a cell have to do to move a substance from an area of low concentration to an area with high concentration?

Passive transport is a naturally occurring phenomenon and does not require the cell to expend energy to accomplish the movement. In passive transport, substances move from an area of higher concentration to an area of lower concentration in a process called diffusion.

What are 3 types of passive transport?

Three common types of passive transport include simple diffusion, osmosis, and facilitated diffusion.

What are the 4 types of membrane transport?

The four main kinds of passive transport are simple diffusion, facilitated diffusion, filtration, and/or osmosis.

What type of transport is simple diffusion?

Passive Transport

What is passive transport and examples?

Summary. Passive transport does not require energy input. An example of passive transport is diffusion, the movement of molecules from an area of high concentration to an area of low concentration. Carrier proteins and channel proteins are involved in facilitated diffusion.

Is osmosis An example of passive transport?

Osmosis is a passive transport process during which water moves from areas where solutes are less concentrated to areas where they are more concentrated.

What type of transport is osmosis?

Osmosis is a type of simple diffusion in which water molecules diffuse through a selectively permeable membrane from areas of high water concentration to areas of lower water concentration.

What are the 3 types of osmosis?

What are the three types of osmotic conditions that affect living cells? The three types of osmotic conditions include- hypertonic, isotonic, and hypotonic.

What is the difference between osmosis and passive transport?

Osmosis is a passive form of transport that results in equilibrium, but diffusion is an active form of transport. Osmosis only allows solvent molecules to move freely, but diffusion allows both solvent and solute molecules to move freely.

What is osmosis diagram?

Osmosis is the diffusion of water across a partially permeable membrane from a dilute solution (high concentration of water) to a concentrated solution (low concentration of water). In the diagram, the concentration of sugar is initially higher on the right side of the membrane.

What is the difference between active and passive transport give examples?

Active transport requires energy for the movement of molecules whereas passive transport does not require energy for the movement of molecules. Simple diffusion, facilitated diffusion, osmosis and filtration are examples of passive transport.

What determines whether a transport is active or passive?

When a molecule moves down its concentration gradient is it participating in passive transport; moving up the concentration gradient requires energy making it active transport.

What is the process of passive transport?

In passive transport, substances move from an area of higher concentration to an area of lower concentration in a process called diffusion. A physical space in which there is a different concentration of a single substance is said to have a concentration gradient.

What is needed for active transport but not for passive transport?

While active transport requires energy and work, passive transport does not. There are several different types of this easy movement of molecules. It could be as simple as molecules moving freely such as osmosis or diffusion. Sometimes, proteins are used to help move molecules more quickly.

What type of transport does not require energy?

Passive transport requires no energy from the cell. Examples include the diffusion of oxygen and carbon dioxide, osmosis of water, and facilitated diffusion.

What are types of active transport?

There are two types of active transport: primary active transport that uses adenosine triphosphate (ATP), and secondary active transport that uses an electrochemical gradient.

What is an example of active transport?

During active transport, a protein pump uses energy, in the form of ATP, to move molecules from an area of low concentration to an area of high concentration. An example of active transport is the sodium-potassium pump, which moves sodium ions to the outside of the cell and potassium ions to the inside of the cell.

What type of energy is needed for active transport?

Active transport mechanisms require the use of the cell’s energy, usually in the form of adenosine triphosphate (ATP).

What is the main function of active transport?

Active transport: moving against a gradient To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells.

What is facilitated diffusion is it active or passive cite two examples?

Facilitated diffusion is diffusion along transport proteins. It is passive. Examples are aquaporins and neurotransmitters.

Is aquaporin active transport?

The primary function of most aquaporins is to transport water across cell membranes in response to osmotic gradients created by active solute transport.

Are channel proteins active or passive?

There are two classes of membrane transport proteins—carriers and channels. Both form continuous protein pathways across the lipid bilayer. Whereas transport by carriers can be either active or passive, solute flow through channel proteins is always passive.

What passes through channel proteins?

Water molecules and ions move through channel proteins. Other ions or molecules are also carried across the cell membrane by carrier proteins. The ion or molecule binds to the active site of a carrier protein.

Which are examples of channel proteins?

Aquaporin is an example of a channel protein in the cell membrane that allows water molecules to flow through. Conversely, carrier proteins do not form channels. Rather, they have binding sites from where molecules can bind to.