Home
Class 12
CHEMISTRY
(a) Calculate the degree of dissociation...

(a) Calculate the degree of dissociation 'A' and 'B' are dilute . The limiting molar conductivity of 'B' increases to a smaller extent while that 'A' increase to a much larger extent comparatively . Which of the two is a strong electrolyte ? Justify your answer .
(b) Solution of two electrolytes 'A' and 'B' are dilute . The limiting molar conductivity of 'B' increases to a smaller extent while that of 'A' increase to a much larger comparatively .
Which of the two is a strong electrolyte ? justify your answere.

Text Solution

Verified by Experts

According ti Kohlrausch law
`Lamda^(@)(CH_(3)COOH)= lamda_(H+)^(@)+lamda_(CH_(3)COO^(-))^(@)`
`= 349.6+40.9=390Scm^(2)mol^(-1)`
`Lamda_(m)= (Kxx1000)/(c )`
`Lamda_(m)= (8.0xx10^(-5)Scm^(-1)xx1000cm^(3)L^(-1))/(0.0024molL^(-1)) = 33.33Scm^(2)mol^(-1)`
`alpha=(Lamda_(m))/(Lamda_(m)^(@)`
`alpha=(33.33Scm^(2)mol^(-1)/(390.5Scm^(2)mol^(-1)`= 0.085
Electrolyte B is a strong electrolyte .
Limiting molar cinductivity increases only to a smaller extent for a strong , as on dilution the interaction are overcome .
The degree if dissociation increases , therefore the number of ions in total volume of solution increases.
Promotional Banner

Topper's Solved these Questions

  • SAMPLE QUESTIONS PAPER

    U-LIKE SERIES|Exercise SECTION C (Account for the following)|8 Videos

  • POLYMERS

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST ( SECTION -A (ASSERTION AND REASON))|2 Videos

  • SOLID STATE

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST|8 Videos

Similar Questions

Explore conceptually related problems

The molar conductivity of strong electrolyte

(a) Calculate the degree of dissociation of 0.0024 M acetic acid if conductivity of this solution is 8.0 xx 10^(-5)" S "cm^(-1) . Given . lambda_(H^(+))^(@) = 349.6" S " cm^(2)" mol"^(-1), lamda_(CH_(3)COO^(-))^(@)= 40.9" S " cm^(2) " mol "^(-1) (b) Solutions of two electrolytes ‘A’ and ‘B’ are diluted. The limiting molar conductivity of ‘B’ increases to a smaller extent while that of ‘A’ increases to a much larger extent comparatively. Which of the two is a strong electrolyte? Justify your answer.

Solutions of two electrolytes A and B are diluted. The Lambda_(m) of 'B' increases 1.5 times while that of A increases 25 times. Which of the two is a strong electrolyte? Justify your answer.

Solutions of two electrolytes 'A' and 'B' are diluted. It is found that Lambda_(m) value of 'B' increases 2 times while that of 'A' increases20 times. Which of the two is a strong electrolyte ?

As the dilution of an electrolyte increases

State the law that helps to determine limiting molar conductivity of a weak electrolyte.