Consider osmosis between the inside and outside of a cell separated by a semiper

Question

Consider osmosis between the inside and outside of a cell separated by a semipermeable membrane (water molecules may pass through the membrane). There is a higher concentration of sodium ions inside the cell than outside. Sodium ions are the only solute we will consider.

Which of the following is INCORRECT?

Select one:

a. In equilibrium the concentration of sodium ions must be equal inside and outside the cell.

b. Initially there are more water molecules passing through the membrane from outside to inside than vice-versa.

c. An equililbrium situation occurs when the partial pressure for water molecules has increased on the inside of the cell ( expansion of the cell walls is opposed by elastic forces in the cell walls).

d. In equilibrium, the increase in pressure on the inside of the cell equals the 'osmotic pressure', which depends on the difference of solute concentrations inside and outside.

e. The osmotic pressure is modelled approximately by the Ideal Gas Equation.

Explanation / Answer

all first options are correct except 5th

because osmotic pressure = MRT

here M = molar concentration

so here volume is not there but in ideal gas volume also there.

so mark e option

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