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Why is the greatest concentration of dissolved gases located in the surface zone?
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What is concentration polarization in membrane science?
Many electrochemical reactions produce or consume species in the solution. The rates of reactions involving dissolved species which participate as reactants in the rate-determining step(that stage in the reaction which controls its rate) will be dependent on the concentration of the dissolved species. As the dissolved species are consumed by the reaction, so a greater change in potential will be required to maintain the current, and this is known as concentration polarization. A reaction for which concentration polarization dominates is referred to as mass-transport or diffusion controlled.
What factors can affect the rate of solvation?
Factors that effect the solvation rate include temperature, concentration, surface area, concentration of solvent, and stirring.
How does surface area impact dissolution?
A material with a great surface area is dissolved faster.
What affects the rate of a reaction?
The rate of a reaction increases if: · The temperature is increased · The concentration of a dissolved reactant is increased · The pressure of a reacting gas is increased · Solid reactants are broken into smaller pieces · A catalyst is used
How does surface area affect diffusion rate?
Diffusion is the movement of particles across a selectively permeable membrane, from a high concentration to a low concentration. So the larger the surface area, the quicker the rate of diffusion because there is more space to diffuse in.
What brings greater concentration of dissolved nutrients to the ocean surface?
Upwelling
What is concentration polarization in membrane science?
Many electrochemical reactions produce or consume species in the solution. The rates of reactions involving dissolved species which participate as reactants in the rate-determining step(that stage in the reaction which controls its rate) will be dependent on the concentration of the dissolved species. As the dissolved species are consumed by the reaction, so a greater change in potential will be required to maintain the current, and this is known as concentration polarization. A reaction for which concentration polarization dominates is referred to as mass-transport or diffusion controlled.
What factors can affect the rate of solvation?
Factors that effect the solvation rate include temperature, concentration, surface area, concentration of solvent, and stirring.
What is the relative concentration of elements on lunar surface compared to earth's surface?
The relative concentration of elements on lunar surface compared to earth's surface is known as regolith.
What is concentration polarization cross flow filtration?
Convective and back-diffusive flow of solvent can cause a build-up of dissolved solutes and macromolecules near and on the surface of the membrane this is known as concentration polarization. When concentration polarization occurs there is a differential solute concentration between the membrane surface and the bulk of the feed stream. The osmotic pressure in the polarized layer due to the high local solute concentration lowers the transmembrane pressure therefore decreasing flux. In cross -flow filtration there is a general decline in flux over time of operation this is due to concentration polarization. The decline in flux can be restored with the manipulation of the operating parameters.
How does surface area impact dissolution?
A material with a great surface area is dissolved faster.
What is the water vapor concentration at the earth's surface?
The water vapor concentration constantly fluctuates.
What do concentration surface area and temperature all have in common?
increasing of temperature >> increasing concentration
When limestone on the surface is dissolved by ground water it forms?
caverns
What area has greatest amount of surface runoff?
Any hard inpermiable surface will have high runoff. I would place cement or asphault as the highest with cities having the highest concentration of these surface types. Certain highly rocky regions may also exhibit high runnoff depending on the type of rock involved.
What affects the rate of a reaction?
The rate of a reaction increases if: · The temperature is increased · The concentration of a dissolved reactant is increased · The pressure of a reacting gas is increased · Solid reactants are broken into smaller pieces · A catalyst is used
Why would surface water in the North sea be more likely to contain a high percentage of dissolved gases than the surface water in the Caribbean?
The north sea could have a higher % of dissolved gases because of the fact that it could be colder there. the colder the water the more dissolved gases there are.
