December 02, 2021, 12:52:39 AM
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### Topic: I need help in those questions asap!!  (Read 341 times)

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#### faris.z34

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• Posts: 3
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##### I need help in those questions asap!!
« on: April 12, 2021, 08:44:40 AM »
1.Calculate Van't Hoff (isotonic) coefficient of 0.1 M CaCl2 solution if the degree of dissociation is 90%
2.Calculate the osmotic pressure of 0.1 M NaCl solution at 27oC (gas constant value is 8.314 J/(mol K)
3.What is the boiling point of 0.2 molal glucose solution? Assume Kb for water to be 0.52 Kkg/mol
4.Freezing point depression is proportional to
5.Which of the following properties is proportional to mole fraction
vapour pressure lowering
osmotic pressure
rate of diffusion
boiling point elevation
freezing point depression
6.Colligative properties of solutions depend on
mass of solution
mass of the solute per unit of solution
mass fraction of the solution
number of solute particles per unit of solution
number of solvent particles
7.How many moles of glucose should be added to 1000 g of water so that the freezing point is depressed by 0.93K? Assume Kf for water to be 1.86 Kkg/mol
8. Which of the following solutions has the lowest osmotic pressure?
0.3 M glucose
0.1 M MgCl2
0.2 M Na2SO4
0.3M KCl
0.2 M sucrose
9. Choose colligative properties from the following

freezing point depression
freezing point of the solvent
boiling point of the solution
boiling point elevation
melting point
10. Which of the following solution has the highest boiling point?
0.2 M glucose
0.2 M NaCl
0.1 M Mg(NO3)2
0.1 M K3PO4
0.3 M sucrose

#### Babcock_Hall

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##### Re: I need help in those questions asap!!
« Reply #1 on: April 12, 2021, 08:48:18 AM »