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

Answer the following. Explain reverse osmosis. - Chemistry

Advertisements
Advertisements

प्रश्न

Answer the following.

Explain reverse osmosis.

थोडक्यात उत्तर
Advertisements

उत्तर

i. If a pressure larger than the osmotic pressure is applied to the solution side, then pure solvent from the solution passes into pure solvent side through the semipermeable membrane. This phenomenon is called reverse osmosis.

ii. For example, consider fresh water salt water separated by a semipermeable membrane. When the pressure larger than the osmotic pressure of a solution is applied to solution, pure water from salty water passes into fresh pure water through the membrane. Thus, the direction of osmosis can be reversed by applying a pressure larger than the osmotic pressure.

iii. The schematic set up for reverse osmosis is as follows:

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Solutions - Exercises [पृष्ठ ४६]

APPEARS IN

बालभारती Chemistry [English] Standard 12 Maharashtra State Board
पाठ 2 Solutions
Exercises | Q 3.5 | पृष्ठ ४६

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

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?


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.


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 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).


Choose the most correct option.

In calculating osmotic pressure the concentration of solute is expressed in _______.


Choose the most correct option.

A living cell contains a solution which is isotonic with 0.3 M sugar solution. What osmotic pressure develops when the cell is placed in 0.1 M KCl solution at body temperature?


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 in one or two sentences.

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


Answer the following.

What are isotonic and hypertonic solutions?


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.

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?


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


Two solutions have different osmotic pressures. The solution of higher osmotic pressure is called ____________.


At constant temperature the osmotic pressure of a solution 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)


At a given temperature, osmotic pressure of a concentrated solution of a substance ______.


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


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


Isotonic solutions have same


In Isotonic solution


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


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


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)


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

Define reverse osmosis.


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


Write the condition of reverse osmosis.


Calculate the osmotic pressure of 0.03 mole of non electrolyte solute dissolved in 0.1 dm3 of water at 300 K. [R = 0.082 dm3 atm mol-1 K-1]


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×