Home
Class 12
CHEMISTRY
1.4275 g sample of [Cr(NH3)6]SO4Cl (mol....

1.4275 g sample of `[Cr(NH_3)_6]SO_4Cl` (mol. Wt. =285.5 ) is dissolved to prepare 250 mL solution showing an osmotic pressure of 1.478 atm at `27^@C`. Which of the following statements are correct about this solution ?
(I)Each molecule furnishes three ions in solution
(ii)The van't Hoff factor is 3.
(iii)Equilibrium molarity of `[Cr(NH_3)_6]SO_4Cl`=0
(iv)Equilibrium molarity of `[Cr(NH_3)_6]^(3+)` =0.02 M

A

I and III only

B

II and IV only

C

I,II and IV only

D

all of these

Text Solution

Verified by Experts

The correct Answer is:
D
Molarity =`(1.4275xx1000)/(285.5xx250)=0.02 M , pi=CRT`
`therefore pi_"cal"=0.02xx0.0821xx300`=0.4926 atm
`pi_"obs"/pi_"cal"=i=1.478/0.4926=3`
`because alpha=(i-1)/(n-1) rArr alpha=1 (because n=3)`
`{:(Also,[Cr(NH_3)_6]SO_4.Cl, hArr , [Cr(NH_3)_6]^(3+)+,SO_4^(2-)+,Cl^(-)),(,0.02 M , ,0,0,0),(Eq.conc,0,,0.02 M,0.02M,0.02M):}`
Promotional Banner

Topper's Solved these Questions

  • SOLUTIONS

    NCERT FINGERTIPS|Exercise NCERT Exemplar|26 Videos

  • SOLUTIONS

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

  • SOLUTIONS

    NCERT FINGERTIPS|Exercise Abnormal Molar Masses|16 Videos

  • PRACTICE PAPER -3

    NCERT FINGERTIPS|Exercise Practice Paper 3|50 Videos

  • SURFACE CHEMISTRY

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

1.2575 g sample of [Cr(NH_(3))_(6)]SO_(4)Cl(Mw=251.5) is dissolved to prepare 250 mL solution showing an osmotic pressure of 1.478 atm of Hg at 27^(@)C . Which of the following statements is/are correct about this solution?

A 0.010 g sample of Cr(NH_(3))_(4)(SO_(4))Cl is dissolved in 25.0 nL of water and the osmotic pressure of the solution is 59.1 torr at 25^(@)C . How many moles of ions are produced per mole of compound?

The complex [Pt(NH_(3))_(6)]Cl_(4) furnishes ________ ions in aqueous solution.

A solution cantains 0.8960 g of K_(2)SO_(4) in 500 mL. Its osmotic pressure is found to be 0.69 atm at 27^(@)C . Calculate the value of Van't Hoff factor.

How many ions are produced from the complex Co(NH_3)_6Cl_2 in solution? (i). 6 (ii). 4 (iii). 3 (iv). 2

A solution contains 0.8133 g of K_(2)SO_(4) in 500 mL . If osmotic pressure is found to be 0.69 atm at 27^(circ)C . Calculate the value of van't Hoff's factor.

Van't Hoff factor of 0.1 m aqueous solution of Al_2(SO_4)_3 which undergoes 80% dissociation is