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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Offline faris.z34

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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

Offline Babcock_Hall

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Re: I need help in those questions asap!!
« Reply #1 on: April 12, 2021, 08:48:18 AM »
It is a forum rule (see red link above) that you must show your attempts before we can help you.

Offline faris.z34

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Re: I need help in those questions asap!!
« Reply #2 on: April 12, 2021, 08:51:16 AM »
I actually tried solving them! Our teacher went thru these lessons while I was facing family problems. I tried reaching out to google but it couldn't help. Ill have stand alone classes with her later this week. thanks in advance :)

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