Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
(i) When egg is placed in dilute mineral acid solution (preferably dilute \[\ce{HCl}\] solution), the hard external \[\ce{CaCO3}\] layer of the egg dissolves out/removed without damaging its semipermeable menbrane.
(ii) Yes, this egg can be inserted into a bottle with a narrow neck without distorting is shape.
This process invloved utilising phenomenon of osmosis is explained as below:
Egg is placed in mineral acid solution - after time egg is removed and placed in a hypertonic solution* - Size of the egg gradually decreases after some time and it shrivles due to osmasis. SInce the egg has shrivelled it can, now be inserted easily into a bottle with narrow mouth. The egg is, therefore, placed in a battle with narrow neck and then a hypotonic solution is filled into this bottle. On adding hypotonic solution**, egg regains shape due to osmosis.
• Hypertonic solution - is a solution with higher salt concentration than that of the normal body cells so that the solvent/water is drawn out of the cell by osmosis; or any solution with higher osmotic pressure than another solution is called "Hypertonic solution".
• Hypotonic solution is a solution with lower salt concentration than that of the normal body cells so that water/solvent flows into the cell by osmosis; or - hypotonic solution is a solution which has lower osmotic pressure than the other solution.
APPEARS IN
संबंधित प्रश्न
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.
Determine the osmotic pressure of a solution prepared by dissolving 25 mg of K2SO4 in 2 liter of water at 25°C, assuming that it is completely dissociated.
Answer the following in one or two sentences.
What is osmotic pressure?
Answer the following.
What are isotonic and hypertonic solutions?
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?
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 ____________.
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 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 mol−1)
Which of the following statements is false?
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 ______.
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.
Name the four colligative properties that are oftently used for determination of molecular mass.
