Home
Class 12
CHEMISTRY
Calculate Lambda^(@) for acetic acid, ...

Calculate `Lambda^(@)` for acetic acid,
Given that, `Lambda_((HCl))^(@)` = 426 S `cm^(2) "mol"^(_1)`
`Lambda_((NaCl))^(@) ` = 126 S `cm^(2) "mol"^(_1)`
`Lambda_((CH_(3) COONa))^(@) `= 91 S `cm^(2) "mol"^(-1)`
Recall Kohlrausch's law to find the conductance of weak electrolyte.

Text Solution

Verified by Experts

`Lambda_((CH_(3)COOH))^(@) = Lambda _(H)^(@) + Lambda_(CH_(3)COO^(-))^(@)`
`= Lambda_(H^(+))^(@) + Lambda_(Cl^(-))^(@) + Lambda_(CH_(3)COO^(-))^(@) + Lambda_(Na^(+))^(@) - Lambda_(Cl^(-))^(@) - Lambda_(Na^(+))^(@)`
`= Lambda_((HCl))^(@) + Lambda_((CH_(3)COONa))^(@) - Lambda_((NaCl))^(@)`
`= ( 426 + 91- 126 ) S cm^(2) "mol"^(-1)`
= 391 S `cm^(2) "mol"^(-1)`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    ARIHANT PUBLICATION|Exercise SAMPLE QUESTION (PART III)|4 Videos

  • ELECTROCHEMISTRY

    ARIHANT PUBLICATION|Exercise QUESTIONS FOR PRACTICE (PART 1) ( CONDUCTOR ELECTROLYTES AND THEIR DISSOCIATION, ELECTROLYSIS, ITS LAW AND APPLICATIONS)(MULTIPLE CHOICE TYPE QUESTIONS) |4 Videos

  • ELECTROCHEMISTRY

    ARIHANT PUBLICATION|Exercise CHAPTER PRACTICE ( LONG ANSWER TYPE QUESTIONS) |3 Videos

  • D-BLOCK ELEMENTS

    ARIHANT PUBLICATION|Exercise Chapter practice (Long answer type questions)|2 Videos

  • ELEMENTS : NITROGEN FAMILY

    ARIHANT PUBLICATION|Exercise CHAPTER PRACTICE ( Long Answer Type Questions ) |11 Videos

Similar Questions

Explore conceptually related problems

Calculate the degree of dissociation of acetic acid at 298 K , given that Lambda_(m) ( CH_(3) COOH) = 11.7 S cm^(2) "mol"^(-1) Lambda_(m)^(@) ( CH_(3)COO^(-)) = 40.9 S cm^(2) "mol"^(-1) Lambda_(m(H^(+)))^(@) = 349.1 S cm^(2) "mol"^(-1)

From the following molar conductivities at infinite dilution. Lambda_(m)^(@) for Ba(OH)_(2) = 457.6 Omega^(-1) cm^(2) "mol"^(-1) Lambda_(m)^(@) for BaCl_(2) = 240.6 Omega^(-1) cm^(2) "mol"^(-1) Lambda_(m)^(@) for NH_(4) Cl = 129.8 Omega^(-1) cm^(2) "mol"^(-1) Calculate Lambda_(m)^(@) for NH_(4) OH .

Calculate the value of Molar conductivity of MgCl_(2) at infinite dilution if lamda_(Mg^2+)=107.12 ohm^(-1)cm^2 mol^(-1) and lambda_(Cl^-1)= 76.34 ohm^(-1)cm^2 mol^(-1)

Degree of dissociation of pure water is 1.9 xx 10^(-9) . Molar ionic conductance of H^(+) ions and OH^(-) ions at infinite dilution are 200 S cm^(2) "mol"^(-1) and 350 S c^(2) "mol"^(-1) respectively. What is the molar conductance of water ?

The molar conductivity of 0.025 mol L^(-1) methanoic acid is 46.1 S cm^(2) "mol^(-1) . Calculate its degree of dissociation and dissociation constant. Given, lambda^(@) ( H^(+)) = 349.6S cm^(2) "mol"^(-1) and lambda^(@) ( HCOO^(-)) = 54.6 S cm^(2) "mol"^(-1)

The molar conductivities of KCl, NaCl and KNO_(3) are 152,128 and 111 S cm^(2) "mol"^(-1) , respectively. What is the molar conductivity of NaNO_(3) ?

The molar conductance of a solution of AlCl_(3) in found to be 130 mho cm^(2) "mol"^(-1) at 298K. What would be its equivalent conductance at the same temperature ?

The Lambda_(m)^(@) values for NaCl and KCl are 126.5 and 149.9 Omega^(-1) cm^(2) "mol"^(-1) respectively. The ionic conductance of Na^(+) at infinite dilution is 50.1 Omega^(-1) cm^(2) "mol"^(-1) . Calculate the ionic conductance at infinite dilution for potassium ion ( K^(+)) .

Conductivity of 2.5 xx 10^(-4) M methonoic acid is 5.25 xx 10^(-5) S cm^(-1) . Calculate its molar Condcutivity and degree of dissociation. Given : lambda^(@) ( H^(+) = 349.5 S cm^(2) "mol"^(-1) and lambda^(@) ( HCOO^(-)) = 50.5 S cm^(2) "mol"^(-1) .