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Why is free water concentration the driving force in osmosis?
osmosis is the diffusion of water. In diffusion, substances move from an area of high concentration to and area of lower concentration, or from a hypotonic solution to a hypertonic solution. Free water concentration just refers to the concentration of solute in a solution (in osmosis, water). If the concentration of solute is higher outside of a cell bits of solute will move towards the area of lower concentration: inside the cell. If the concentration of solute is higher within the cell then some solute will leave the cell. Cells "want" to be isotonic, or to have equal amounts of solute both inside and out. When a cell reaches an isotonic state it wants to stay that way, so the water moves across the membrane at the same rate. Hope that helps! Source: AP bio student
What factors determines the osmosis of a cell?
There are a many factors which affect the rate of osmosis. One of the factors is the temperature of the solution and solvent. Temperature affects osmosis because when temperature goes higher, molecules move faster. So, osmosis will increase. If the temperature is decreased, the rate of osmosis will decrease too. Another factor which affects osmosis is the size of the particles. The size of the particles affect osmosis because osmosis is the movement of a solvent through a membrane and membrane's pores, or empty spaces, are different sizes. Only certain particles can fit through any given membrane. The concentration gradient can also affect osmosis because osmosis is a transport process therefore it can only go with the concentration gradient. The lower the concentration of the solute within a solvent, the faster that osmosis will occur into that solvent. The light and dark also affects osmosis because the greater the light, the faster osmosis occurs. The PH affects osmosis as well. The greater the pH of a solution, the more acidic or concentrated it becomes. The greater the concentration gradient of a substance on either side of a membrane the faster osmosis occurs.
How does concentration affect the rate of diffusion?
the concentration of saline affects the rate of diffusion through the process of osmosis and diffusion. try the experiment of the 3 cell membranes
How can you use weights of the filled cell models to determine the rate and direction of diffusion?
If the cell model weighs more after the elapsed time (30 min in this case), it can be determined that water has diffused INTO the cell model. However if the cell model weighs less after the elapsed time (30 min in this case), it can be determined that water has diffused out of the cell model. The rate of diffusion compared to other cell models being investigated in the experiment can be determined by comparing the change in mass to other cell models. For example, if a cell model containing glucose changed + 15.7 % in mass over 30 minutes and a cell model containing sucrose changed + 27.3 % in mass over 30 minutes, it can be assumed that the diffusion rate in the sucrose model is faster than in the glucose model. You would have to have a way to measure solute concentrations and such in order to determine water potentials and what not. Hope this helps, just my insight from completing AP Biology Investigation 4. Current AP Biology student.
What is plasmolesis?
i think the person is foolish who have asked this question because he dont even knows the correct spelling of the word plasmolysis so i dont think that he should be given the answer of this question
What happen when solvent is equal to solute?
solution is in equilibrium and the solvent and solute continue diffusion or osmosis at an equal rate.
What is the formula to calculate the rate of osmosis?
how do you calculate the rate of osmosis
Why does temperature affect the rate of osmosis?
as the temperature increases, the rate of osmosis increases
Does temperature affect the rate of osmosis?
Yes as temperature increases. So, does the rate of osmosis.
When will the net osmosis rate equal zero?
When the solute concentration on both sides of the semi-permeable membrane is the same.
Does osmosis occur if a cell is placed in a isotonic solution?
Yes, molecules still diffuse into the cell and out of the cell, but it happens at an equal rate. The system is said to be at equilibrium, and no change in diffusion is measured because the molecules entering and leaving the cells do so equally.
How does cell shape change during osmosis and cell diffusion?
Osmosis effects the volume of a cell. when the cell has equal water molecules in the water aroung it and in the cell it is shaped normally. When there is a lot of salt in the water the cell shrinks because there is less water content in the salty water thus the cell gets rid of the extra water molecules. When there is very little salt content in the water the cell gets bigger because the cell absorbs to much water.
What are the factors that affect the rate of osmosis?
The rate of osmosis is dependent on factors such as temperature, particle size (surface area), and the concentration gradient and time given for osmosis to occur
Does changing the surface area affect the rate of osmosis?
If you're referring to a cell and it's membrane, then the greater the surface area of the outer cell membrane, the faster osmosis will occur. This is because the water will have more room to etner the cell through the membrane.
How does temperature affect osmosis rate?
Yes it does as temperature increases so does the rate of osmosis for example as temperature increases the osmotic rate gets faster etc.
How does temperature affect the rate of osmosis?
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Why is free water concentration the driving force in osmosis?
osmosis is the diffusion of water. In diffusion, substances move from an area of high concentration to and area of lower concentration, or from a hypotonic solution to a hypertonic solution. Free water concentration just refers to the concentration of solute in a solution (in osmosis, water). If the concentration of solute is higher outside of a cell bits of solute will move towards the area of lower concentration: inside the cell. If the concentration of solute is higher within the cell then some solute will leave the cell. Cells "want" to be isotonic, or to have equal amounts of solute both inside and out. When a cell reaches an isotonic state it wants to stay that way, so the water moves across the membrane at the same rate. Hope that helps! Source: AP bio student
