मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Derive an expression to calculate molar mass of non-volatile solute by osmotic pressure measurement.

Advertisements
Advertisements

प्रश्न

Derive an expression to calculate molar mass of non-volatile solute by osmotic pressure measurement.

टीपा लिहा
Advertisements

उत्तर

For very dilute solution

Where π = `(n_2RT)/V`

π = Osmotic Pressure

n2 = Number of moles of solute

R = Gas constant

T = Absolute temperature

V = Volume of solution

n2 = `(W_2 ("Mass of solute"))/(M_2 ("Molar mass of solution"))`

M2 = `(W_2RT)/(πV)`

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2021-2022 (March) Set 1

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

Determine the osmotic pressure of a solution prepared by dissolving 2.5 × 10−2 g of K2SO4 in 2L of water at 25°C, assuming that it is completely dissociated.

(R = 0.0821 L atm K−1 mol−1, Molar mass of K2SO4 = 174 g mol−1)


Which of the following is not a colligative property?


What happens when the external pressure applied becomes more than the osmotic pressure of solution?


Determine the amount of CaCl2 (i = 2.47) dissolved in 2.5 litre of water such that its osmotic pressure is 0.75 atm at 27°C.


Define osmotic pressure.


Which of the following 0.1 M aqueous solutions will exert the highest osmotic pressure?


Define Semipermeable membrane


Calculate the mass of NaCl (molar mass = 58.5 g mol−1) to be dissolved in 37.2 g of water to lower the freezing point by 2°C, assuming that NaCl undergoes complete dissociation. (Kf for water = 1.86 K kg mol−1)


Calculate the mass of a compound (molar mass = 256 g mol−1) to be dissolved in 75 g of benzene to lower its freezing point by 0.48 K (Kf = 5.12 K kg mol−1).


Define the following term:
isotonic solution


Choose the most correct option.

The osmotic pressure of blood is 7.65 atm at 310 K. An aqueous solution of glucose isotonic with blood has the percentage (by volume)________.


Answer the following.

What are isotonic and hypertonic solutions?


Answer the following.

Explain reverse osmosis.


Answer the following.

How molar mass of a solute is determined by osmotic pressure measurement?


An aqueous solution of a certain organic compound has a density of 1.063 g mL-1 , osmotic pressure of 12.16 atm at 25 °C and a freezing point of 1.03 °C. What is the molar mass of the compound?


Which of the following statements is applicable for 0.1 M urea solution and 0.1 M sucrose solution?


What are hypertonic solutions?


Define Osmosis.


Which of the following is a colligative property?


At constant temperature the osmotic pressure of a solution is ____________.


20 g of a substance were dissolved in 500 mL of water and the osmotic pressure of the solution was found to be 600 mm of mercury at 15°C. The molecular weight of the substance is ______.


The average osmotic pressure of human blood is 7.8 bar at 37°C. What is the concentration of an aqueous NaCl solution that could be used in the blood stream?


A solution containing 10 g per dm3 of urea (molar mass 60 g mol−1) is isotonic with 5% solution of non-volatile solute, MB of solute is:


Which of the following statements is false?


Isotonic solutions must have the same:

(i) solute

(ii) density

(iii) elevation in boiling point

(iv) depression in freezing point


Give an example of a material used for making semipermeable membrane for carrying out reverse osmosis.


Match the items given in Column I and Column II.

Column I Column II
(i) Saturated solution (a) Solution having same osmotic
pressure at a given temperature as
that of given solution.
(ii) Binary solution (b) A solution whose osmotic
pressure is less than that of another.
(iii) Isotonic solution (c) Solution with two components.
(iv) Hypotonic solution (d) A solution which contains maximum
amount of solute that can be
dissolved in a given amount of
solvent at a given temperature.
(v) Solid solution (e) A solution whose osmotic pressure
is more than that of another.
(vi) Hypertonic solution (f) A solution in solid phase.

How can you remove the hard calcium carbonate layer of the egg without damaging its semiprermiable membrane? Can this egg be inserted into a bottle with a narrow neck without distorting its shape? Explain the process involved.


Osmotic pressure of a solution increases if


Which of the following colligative property can provide molar mass of proteins (or polymers or colloids) with greatest precision?


Isotonic solutions have same


Which one of the following is a colligative property?


Blood cells retain their normal shape in solution which are


In Isotonic solution


The vapour pressure of water is 12.3 k pa at 300 k. Calculated the vapour pressure of molal solution in it.


Osmotic pressure of a solution containing 2 g dissolved protein per 300 cm3 of solution is 20 mm of Hg at 27°C. The molecular mass of protein is ______.


The following solutions were prepared by dissolving 10 g of glucose (C6H12O6) in 250 ml of water (P1), 10 g of urea (CH4N2O) in 250 ml of water (P2) and 10 g of sucrose (C12H22O11) in 250 ml of water (P3). The right option for the decreasing order of osmotic pressure of these solutions is


Assertion (A) : Osmotic pressure is a colligative property.

Reason (R) : Osmotic pressure is proportional to the molality.


Isotonic solutions are the solutions having the same ______.


Arrange the following solutions in the order of increasing osmotic pressure (π) assuming complete ionization.

  1. 0.5M Li2 SO4
  2. 0.5M KCl
  3. 0.5M Al2 (SO4)3 
  4. 0.1 M BaCl2

Define reverse osmosis.


Name the four colligative properties that are oftently used for determination of molecular mass.


How will you determine molar mass of solute from osmotic pressure?


The plot of osmotic pressure (π) vs concentration (mol L−1) for a solution gives a straight line with slope 25.73 L bar mol−1. The temperature at which the osmotic pressure measurement is done is ______.

(Use R = 0.083 L bar mol−1 K−1)


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×