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How do scientists measure the standard reduction potential of a half cell?
Scientists typically use a standard hydrogen electrode (SHE) as a reference electrode to measure the standard reduction potential of a half-cell. The half-cell under study is connected to the SHE through a salt bridge, and the cell potential is measured using a voltmeter. By comparing the potential of the half-cell with that of the SHE at standard conditions (1 M concentration and 25 degrees Celsius), the standard reduction potential of the half-cell can be determined.
What must be the sign of the standard cell potential (cell) for a redox reaction to be spontaneous?
For a redox reaction to be spontaneous, the standard cell potential (cell) must be positive.
Does the cell potential change with concentration variations in a chemical reaction?
Yes, the cell potential can change with concentration variations in a chemical reaction. This is because the concentration of reactants and products can affect the flow of electrons in the cell, which in turn influences the cell potential.
How can one determine the cell potential in a chemical reaction?
The cell potential in a chemical reaction can be determined by calculating the difference in standard electrode potentials of the two half-reactions involved in the cell. The cell potential is the difference between the reduction potentials of the two half-reactions. The formula for calculating cell potential is Ecell Ered(cathode) - Ered(anode).
Would a galvanic cell work without a salt bridge?
The electrolyte of a commercial galvanic cell normally extends from anode to cathode without interruption by a salt bridge. A salt bridge is normally a teaching tool to help show that: 1. Galvanic half-cells do not produce voltage 2. Conductors and insulators are not necessarily salt bridges. An electrolyte must extend from anode to cathode before the galvanic cell can produce voltage. 3. The chemical composition of the salt bridge can differ from the electrolytes in the half cells. 4. Ions travel through the salt bridge between the cell's anode and cathode. Salt bridges raise more questions than answers. For example: 1. Can the difference between an electrolyte and a conductor be defined? 2. How do ions quickly move through a solid or a long electrolyte? 3. When salt bridge composition differs from the galvanic cell electrolyte(s), must the salt bridge chemically react with the galvanic cell electrolyte(s)? 4. Why does galvanic cell voltage remain nearly constant while anode to cathode distance doubles.
What would happen to the resting membrane potential of a neuron if sodium were allowed to travel freely down its concentration gradient?
The cell will depolarise
What would be the pressure potential of flaccid cell?
The pressure potential of a flaccid cell would be low or close to zero. Flaccid cells have lost water and are not turgid, so the pressure potential, which is related to the water pressure inside the cell, would be minimal.
What would happen if glycolysis could not form in a cell?
If glycolysis could not happen in a cell, the cell would not produce ATP molecules.
According to the all or none principle what would happen if a cell were depolarized twice the normal amount needed to produce an action potential?
If a cell were depolarized twice the normal amount needed to produce an action potential, it would still only produce a single action potential. The all-or-none principle states that once the threshold for an action potential is reached, the neuron will fire with a fixed amplitude and duration regardless of the strength of the stimulus.
What would happen if a cell didn't have vesicles?
the cell would die.
What would happen if glycolsis did not happen in a cell?
If glycolysis could not happen in a cell, the cell would not produce ATP molecules.
How do scientists measure the standard reduction potential of a half cell?
Scientists typically use a standard hydrogen electrode (SHE) as a reference electrode to measure the standard reduction potential of a half-cell. The half-cell under study is connected to the SHE through a salt bridge, and the cell potential is measured using a voltmeter. By comparing the potential of the half-cell with that of the SHE at standard conditions (1 M concentration and 25 degrees Celsius), the standard reduction potential of the half-cell can be determined.
What would happen if you had a cell in the water and molecules were in the cell and some were out the cell what would most likely happen after a period of time?
If the concentration of molecules is higher inside the cell compared to outside, water would move into the cell to dilute the higher concentration of molecules. This may cause the cell to swell or burst. If the concentration of molecules is higher outside the cell, water would move out of the cell causing it to shrink or shrivel. The movement of water is driven by osmosis, which aims to equalize the concentration of molecules inside and outside the cell.
What would happen if the mitochondria in a cell went missing?
the cell would not produce enough energy
What would happen to a cell if it did not have a chloroplast?
In a plant it would die
Would the water potential of a potato cell decrease or increase when it is allowed to dehydrate?
decreases it - no water then no water potential.
What would happen to a cell if the number of ribosomes was reduced?
Reducing the number of ribosomes in a cell would lead to a decrease in protein synthesis, which could affect the cell's ability to function properly. This could result in slower growth, reduced metabolism, and potential disruptions in cell processes that rely on protein production.
