English

Define Semipermeable Membrane. OR Explain the term semipermeable membrane. - Chemistry

Advertisements
Advertisements

Questions

Define Semipermeable membrane

Explain the term semipermeable membrane.

Definition
One Line Answer

Solution 1

Semipermeable membrane: It is a membrane which allows the solvent molecules, but not the solute molecules, to pass through it.

shaalaa.com

Solution 2

Semipermeable membrane is a film such as cellophane which has pores large enough to allow the solvent molecules to pass through them.

shaalaa.com
  Is there an error in this question or solution?
Chapter 2: Solutions - Long answer questions

APPEARS IN

SCERT Maharashtra Chemistry [English] 12 Standard HSC
Chapter 2 Solutions
Long answer questions | Q 3.1

RELATED QUESTIONS

Which of the following is not a colligative property?


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


Blood cells are isotonic with 0.9% sodium chloride solution. What happens if we place blood cells in a solution containing

(i) 1.2% sodium chloride solution?

(ii) 0.4% sodium chloride solution?


Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL of water at 37°C.


At 300 K, 36 g of glucose present in a litre of its solution has an osmotic pressure of 4.98 bar. If the osmotic pressure of the solution is 1.52 bars at the same temperature, what would be its concentration?


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.


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

(a) `Al_2(SO_4)_3`

(b) `Na_2SO_4`

(c) `MgCl_2`

(d) KCl


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


Answer the following in one or two sentences.

What is osmotic pressure?


Answer the following in one or two sentences.

A solution concentration is expressed in molarity and not in molality while considering osmotic pressure. Why?


Answer the following.

A solvent and its solution containing a nonvolatile solute are separated by a semipermeable membrane. Does the flow of solvent occur in both directions? Comment giving a reason.


Answer the following.

The osmotic pressure of CaCl2 and urea solutions of the same concentration at the same temperature are respectively 0.605 atm and 0.245 atm, calculate van’t Hoff factor for CaCl2.


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?


What are hypertonic solutions?


Explain the osmotic pressure of a solution with the help of a thistle tube.


Explain the phenomenon of osmosis.


Explain the term osmosis.


Which of the following is a colligative property?


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?


Osmotic pressure of a solution is 0.0821 atm at a temperature of 300 K. The concentration in moles/litre will be:


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:


The temperature at which 10% aqueous solution of (W/V) of glucose will show the osmotic pressure of 16.4 atoms is: (R = 0.082 L atom K−1 mol1)


Which of the following statements is false?


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.


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


Isotonic solutions have same


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 ______.


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

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


Determine the osmotic pressure of a solution prepared by dissolving 2.32 × 10−2 g of K2SO4 in 2L of solution at 25°C assuming that K2SO4 is completely dissociated.

(R = 0.082 L atm K−1 mol, Molar mass K2SO4 = 174 g mol−1)


A solution containing 10 g glucose has osmotic pressure 3.84 atm. If 10 g more glucose is added to the same solution, what will be its osmotic pressure? (Temperature remains constant)


Define osmotic pressure (π).


Prove that: M2 = `(W_2RT)/(πV)`.


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

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?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×