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  • Solve! A 0.0020 m aqueous solution of an ionic compound Co(NH3)5(NO2)Cl freezes at -0.00732°C. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be (Kf=-1.86°C/m)

A 0.0020 m aqueous solution of an ionic compound Co(NH3)5(NO2)Cl freezes at -0.00732°C. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be (Kf=-1.86°C/m)

  • Option 1)

    3

  • Option 2)

    4

  • Option 3)

    1

  • Option 4)

    2

 

Answers (1)

best_answer

As we learned in concept

Application of Vant Hoff factor -

(a)\: \: \: \left ( \frac{\Delta P}{P^{0}} \right )_{obs}= I_{solute}\times i

(b)\: \: \: \left ( \Delta T_{b} \right )_{obs}= K_{b}\times m\times i

(c)\: \: \: \left ( \Delta T_{f} \right )_{obs}= K_{f}\times m\times i

(d)\: \: \: \left ( \pi \right )_{obs}= C\times R\times T\times i

-

 

 (\Delta T_{F})_{obs}\:=\:K_{F}\times m\times i

D+0.00732=+1.86x0.002xi

\Delta i=1.97 \ \sim 2

 


Option 1)

3

This option is incorrect.

Option 2)

4

This option is incorrect.

Option 3)

1

This option is incorrect.

Option 4)

2

This option is correct.

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Plabita

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