Question

In calculating osmotic pressure the concentration of solute is expressed in

(a) molarity
(b) molality
(c) mole fraction
(d) mass percent

Answer 1

Answer:

• The osmotic pressure of a solution is the pressure difference needed to stop the flow of solvent across a semipermeable membrane. The osmotic pressure of a solution is proportional to the molar concentration of the solute particles in solution. MM is the molar mass of the solute.
• The osmotic pressure of a solution is the pressure difference needed to stop the flow of solvent across a semipermeable membrane. The osmotic pressure of a solution is proportional to the molar concentration of the solute particles in solution. MM is the molar mass of the solute.

Answer 2

In calculating osmotic pressure the concentration of solute is expressed in molarity. (Option a)

• Molarity is the total number of moles per litre of solution. It is widely used and is denoted by M.
• It is also defined as no. of moles of solute in one litre of aquaeous solution.
• Moreover, Molar concentration is a measure of the concentration of a chemical species of a solute in a solution.
• It is expressed in terms of the amount of substance per unit volume of solution.
• The unit symbol of Molarity is mol/L or mol/dm³ in the SI unit.

• Molarity is to express the concentration of the solution and knowing the molarity of a solution is meaningful in many ways.

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