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This is a phenomenon which can occur when a metal is in contact with an environment that contains different concentrations of electrochemically active constituents at different points on the surface of the metal and thereby maintains differences of electrical potential on different parts of the surface of the metal.
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List 6 types of corrosion that effect aircraft?
Galvanic, pitting, concentration cell, intergranular, stress cracking, Uniform etch, crevis corrosion
What is meant by differential aeration corrosion illustrate with suitable examples?
Corrosion of metals arising as a result of the formation of an oxygen concentration cell due to the uneven supply of air on the metal surface is known as differential aeration corrosion.Differential aeration corrosion occurs when a metal surface is exposed to differential air concentrations or oxygen concentrations. The part of the metal exposed to higher oxygen concentration acts as cathodic region and part of the metal exposed lower oxygen concentration acts as anodic region. Consequently, poorly oxygenated region undergoes corrosion.
Is corrosion is a reversible cell reaction or irreversible cell reaction?
Corrosion is an irereversible process.
Acids on glavanized nails?
Corrosion, depending on the type and concentration of the acid.
The concentration of potassium ions inside the cell is usually what?
The concentration of potassium ions inside the cell is usually MORE THEN then the concentration of potassium.
Which ions electrical charges oppose the direction of movement that is caused by their concentration gradient?
Any ion that is positive but has a higher concentration inside the cell or is negative and has a higher concentration outside the cell. Any ion that is positive but has a higher concentration inside the cell or is negative and has a higher concentration outside the cell.
What does a difference in concentration in a cell create?
a concentration gradient
What is isotonic concentration?
Isotonic concentration is when the concentration of soletutes inside and outside of the cell are equal in concentration
What different solutions can cells be in and what happenes to them?
There are three different types of solutions you can place a cell in: hypotonic (concentration of solution less than concentration of cell), isotonic (equal concentrations) and hypertonic (concentration of solution greater than concentration of cell). In a hypotonic solution, the cell will accumulate water (in an attempt to equalize the concentration difference) and will eventually rupture from the water pressure inside the cell. In an isotonic solution, the cell will do nothing. In a hypertonic solution, the cell will shrivel as the water exits the cell to dilute the solution to the same concentration as the cell. This will cause the cell to die.
What happens when the concentration of dissolved substances is greater outside the cell than inside?
Particles always move from an area of high concentration to an area of low concentration. Therefore, if the concentration of dissolved substances is greater outside the cell, they will travel into the cell until there is an equal concentration of the substance on both sides of the cell wall.
There is a greater concentration of na plus and there is a greater concentration of k plus in the cell?
There is a greater concentration of Na plus outside and there is a greater concentration of K plus inside the cell. When the stimulus is delivered, the permeability of the membrane is changed, and Na plus diffuses into the cell, initiating the depolarization of the membrane.
What happens to a cells when they are put in a higher concentration of water?
When a cell is placed in higher concentration of water then endosmosis of water in the cell takes place because in the cell water concentration is low and osmotic(solute) pressure is high so water moves from its higher concentration towards its lower concentration which means it moves inside the cell and the cell becomes turgid.
