What is the minimum pressure that must be applied at 25 degree C to obtain pure

Question

What is the minimum pressure that must be applied at 25 degree C to obtain pure water by reserve osmosis from seawater which is 2.0 M in sodium chloride? 49 atm 1 atm 147 atm 24 atm 98 atm An animal cell assumes its normal volume when it is placed in a solution with a total solute molarity (molarity of no electrolytes plus ion) of 0.3 M. If the cell is placed in a solution with a total solute molarity of 0.6 M. the escaping tendency of water in the solution increases. water enters the cell causing expansion. water leaves the cell causing contraction. no movement of water takes place. the escaping tendency of water in the cell decreases. How many grams of Na_2 CO_3 are contained in 0.400L of 0.250M na_2 CO_3 solution? 5.30g 10.6g 15.3g 20.8g 24.2g For a two-component system, one can calculate the mole fraction of the solvent directly given only the density of the solution. the molarity of the solution. the mole fraction of the solute. the molar mass of the solvent. the molar mass of the solute. All of the following are independent of temperature except molarity. molality. mole fraction. mass percent. grams of solute per total mass of solute plus solvent.

Explanation / Answer

TOO many questions .....

34) osmotic pressure = iCRT = 2 x 2 x 0.0821 x 298 = 97.8 atm ~ 98 atm E option

35) water leaves the cell, causing conrtraction   Option = c

36)   Moles of Na2CO3 = M x V = 0.4 x 0.25 = 0.1 moles   Option = b

Mass = 0.1 x 106 = 10.6 gram

37) Mole fraction os the solute , Option = c

38 )Molarity depends on temperature A

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