Advertisements
Advertisements
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)
Advertisements
उत्तर
When K2SO4 is dissolved in water , ions are produced.
Total number of ions produced = 3
i = 3
`pi = "iCRT" = ("i"xx"n"xx"R"xx"T")/"V"`
`=> pi = 3 xx (2.5 xx 10^-2 "g")/(174 "g mol"^-1) xx (0.0821 "L" "atm" "K"^-1 "mol"^-1)/"2L" xx 298 "K"`
`= 5.27 xx 10^-3 "atm"`
APPEARS IN
संबंधित प्रश्न
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.
Define osmotic pressure.
Define the following term:
isotonic solution
Explain the phenomenon of osmosis.
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?
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. |
Isotonic solutions have same
The vapour pressure of water is 12.3 k pa at 300 k. Calculated the vapour pressure of molal solution in it.
Arrange the following solutions in the order of increasing osmotic pressure (π) assuming complete ionization.
- 0.5M Li2 SO4
- 0.5M KCl
- 0.5M Al2 (SO4)3
- 0.1 M BaCl2
Define reverse osmosis.
