Why is the greater the osmolarity, the greater the concentration?

Popular understanding: the greater the osmotic pressure, the amount of solution substances contained in it.

There are very little, and the amount of solute is very large, so the concentration is relatively large.

The magnitude of osmotic pressure:Depending on the number of solute particles in the solution, the more solute particles, that is, the higher the concentration of the solution, the greater the attraction to water, and the higher the osmotic pressure of the solution; Conversely, the fewer solute particles, i.e., the lower the concentration of the solution, the less attractive it is to water, and the lower the osmotic pressure of the solution.

For semipermeable membranes with different concentrations of aqueous solutions on both sides, the minimum additional pressure applied on the side of high concentration in order to prevent water from permeating from the side of low concentration to the side of high concentration is called osmotic pressure. Osmotic pressure is related to the number of particles in the solution that cannot pass through the semipermeable membrane and the ambient temperature.

The so-called osmotic pressure of the solution, simply put, refers to the attraction of solute particles in the solution to water. The magnitude of the osmotic pressure of the solution depends on the number of solute particles per unit volume of the solution: the more solute particles, that is, the higher the concentration of the solution, the greater the attraction to water, and the higher the osmotic pressure of the solution; Conversely, the fewer solute particles, i.e., the lower the concentration of the solution, the weaker the attraction to the water and the lower the osmotic pressure of the solution.

That is, it is related to the content of inorganic salts and proteins. Among the various inorganic salt ions that make up the extracellular fluid, Na+ and Cl- have obvious advantages in content, and more than 90% of the osmotic pressure of the extracellular fluid is higher than Na+ and Cl-. At 37, the osmolality of human plasma is about 770 kPa, which is equivalent to the osmolality of intracellular fluid.

Hold it so as not to have a headache, the size of the osmotic pressure is mainly determined by the substance, temperature and osmotic concentration. Judging from the title, just consider the magnitude of the osmotic concentration.

1mol l calcium chloride: its osmotic concentration is 3mol l;

Calcium chloride: its osmotic concentration is;

Potassium chloride: its osmotic concentration is;

Glucose: its osmotic concentration is;

Therefore, its osmotic pressure is: 1mol l calcium chloride is greater than calcium chloride is greater than potassium chloride and glucose. (Note: they are considered dilute solutions here).

Summary. Hello, glad to answer for you! The osmotic pressure is directly proportional to the concentration, and only the osmotic pressure is the temperature. The osmotic pressure of a dilute solution is directly proportional to the thermodynamic temperature, i.e., the higher the temperature of a dilute solution, the greater its osmotic pressure.

Is osmotic pressure proportional to concentration a microscopic explanation for why the temperature increases?

Does osmotic pressure increase?

Hello, glad to answer for you! The osmotic pressure is proportional to the concentration, and the osmotic pressure is only affected by the temperature. The osmotic pressure of the dilute solution is directly proportional to the thermodynamic temperature, that is, the higher the temperature of the dilute dissolved liquor, the greater the osmotic pressure.

The higher the temperature of the dilute solution, the greater the osmotic pressure.

In 1886, Van 't Hoff derived a law based on experimental data: for a dilute solution, the osmotic pressure is proportional to the concentration and temperature of the solution, and its proportional constant is the constant r in the equation of state of the bent Zen gas. This law is called Van T Hove's law.

It is expressed by the equation as follows: v=nrt

Okay thank you. However, is it possible to explain the effect of temperature increase on osmotic pressure in the same way as the kinetic theory of gas molecules?

The high temperature must have an effect.

Explain why it affects.

When the concentrations are equal, only the osmotic pressure is affected. The higher the temperature, the greater the osmotic pressure. For semipermeable membranes with different concentrations of aqueous solutions on both sides, the minimum additional pressure applied to the macro-closed ruler on the high-concentration side to prevent water from permeating from the low-concentration side to the high-concentration side is called osmotic pressure.

The osmotic pressure is related to the number of Wei particles in the solution that cannot pass through the semi-permeable membrane and the height of the ambient temperature. At a certain temperature, the osmotic pressure of the solution is proportional to the number of particles (number of molecules or ions) of the solute contained in the solution per unit volume that cannot pass through the semi-permeable membrane, regardless of the nature of the solute.

Could it be that the thermal movement of the molecule intensifies, and the elastic collision of the molecule against the semi-permeable membrane increases, so the osmotic pressure is high?

Dear, no.