June 18, 2021, 11:00:56 PM
Forum Rules: Read This Before Posting


Topic: I need help in those questions asap!!  (Read 167 times)

0 Members and 1 Guest are viewing this topic.

Offline faris.z34

  • New Member
  • **
  • Posts: 3
  • Mole Snacks: +0/-1
I need help in those questions asap!!
« on: April 12, 2021, 08:43:51 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 billnotgatez

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 4222
  • Mole Snacks: +215/-58
  • Gender: Male
Re: I need help in those questions asap!!
« Reply #1 on: April 12, 2021, 09:26:42 AM »
We only post a given question once on the forum.
You have to show your attempts or thoughts at solving the question to receive help.
This is a forum policy.
Click on the link near the top center of the forum page.
Forum Rules: Read This Before Posting.
http://www.chemicalforums.com/index.php?topic=65859.0


topic locked here
see Undergrad board

Sponsored Links