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What is the calculated value of the cell potential at 298k for an electrochemical cell with the following reaction when the f2 pressure is 1.28 ATM the f- concentration is 4.63e-3m and the hg2 con?
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In diffiusion movement of particles across a membrane is drven by what differences?
In diffusion, the movement of particles across a membrane is driven by an electrochemical gradient-the ion's concentration gradient and the membrane potential. Substances will passively diffuse down their concentration gradient to where they are less concentrated. Since the inside of a cell is negative compared to its outside, the membrane potential will drive the passive transport of cations into the cell and anions out of the cell due to electrostatic attractions.
What happens to the resting membrane potential if ATP was depleted in a nerve cell?
All active transportation of ions would stop and ions would be allowed to run down their concentration gradients, eventually reaching equilibrium. At this stage there would be no more electrochemical potential difference across the cell membrane.
Why is electrochemical series expressed in terms of reduction potential?
It is so because every atom want to attract more electron toward itself & no atom wants to can release its electron. that's why electrochemical series is expressed in term of reduction potential.
What are the consequences of the following a cell contaning higher water concentration than the surrounding medium?
If a cell contains higher water concentration, it means it has higher water potential. So, it will lose some of its water inside, and eventually shrink.
How are standard electrode potentials listed in the Standard Reduction Potentials table?
Electrodes are arranged in the increasing order of their standard reduction potential in the Standard reduction Potential Series.This Series is also known as ELECTROCHEMICAL SERIES.
Is concentration gradient a form of potential energy?
w hen solute concentrations differ on the two sides of a membrane
Is equilibrium potential the same as resting potential?
The equilibrium potential refers to the electrochemical potential at equilibrium of a particular ion, as calculated by the Nernst equation. The resting potential refers to the weighted average based upon membrane permeabilities of all the equilibrium potentials of the various ions in a given cell, as calculated by the Goldman equation.
In diffiusion movement of particles across a membrane is drven by what differences?
In diffusion, the movement of particles across a membrane is driven by an electrochemical gradient-the ion's concentration gradient and the membrane potential. Substances will passively diffuse down their concentration gradient to where they are less concentrated. Since the inside of a cell is negative compared to its outside, the membrane potential will drive the passive transport of cations into the cell and anions out of the cell due to electrostatic attractions.
What is the electrochemical gradient of an ion?
spatial variation of both electrical potential and chemical concentration across a membrane. Both components are often due to ion gradients, particularly proton gradients, and the result can be a type of potential energy available for work in a cell
What happens to the resting membrane potential if ATP was depleted in a nerve cell?
All active transportation of ions would stop and ions would be allowed to run down their concentration gradients, eventually reaching equilibrium. At this stage there would be no more electrochemical potential difference across the cell membrane.
What type of energy is a human?
The human body produces electrochemical, kinetic, and potential energy.
Why is electrochemical series expressed in terms of reduction potential?
It is so because every atom want to attract more electron toward itself & no atom wants to can release its electron. that's why electrochemical series is expressed in term of reduction potential.
Factors affecting emf of electrochemical cells?
temperature,length of the wire,area,potential difference
How is it possible for some molecules to be at equilibrium across a biological membrane and yet not be at the same concentration on both sides?
The equilibrium distribution of a molecule across a membrane depends on concentration and membrane potential. A charged molecule will respond to both components of the electrochemical gradient and will distribute accordingly. K+ ions for example, are at equilibrium across the plasma membrane even though they are 30-fold more concentrated inside the cell. the difference in concentration is balanced by the membrane potential, which is more negative on the inside. The membrane potential opposes the movement of cations to the outside of the cell.
What are the consequences of the following a cell contaning higher water concentration than the surrounding medium?
If a cell contains higher water concentration, it means it has higher water potential. So, it will lose some of its water inside, and eventually shrink.
Does acidity affect voltage?
Acidity is the potential for Hydrogen ions in a solution Voltage is the electrical potential difference. These have nothing to do with each other per se. They can be involved in a battery or electrochemical reaction....
What are the two factors that affect the amount of voltage produced by a chemical cell?
The electrochemical cell develops voltage based on a difference in the internal half cell potential. Each half cells produces a chemical reaction which in turn produces a voltage that is affected by the concentration of reactants as well as the type of reactants within each.
