Consider the following data:
Λ°m(Ca2+) = 119.0 S cm2mol–1
Λ°m(Cl-) = 76.3 S cm2mol–1
Λ°m(Mg2+) = 106.0 S cm2mol–1
Λ°m($$SO_{4}^{2-}$$) = 160.0 S cm2mol–1

The correct statement among the following is-

 1 For CaCl2 Λ°m is 271.6 S cm2­­­­ mol–1 and for MgSO4 Λ°m is 266 S cm2­­­­ mol–1. 2 For CaCl2 Λ°m is 195.3 S cm2­­­­ mol–1 and for MgSO4 Λ°m is 266 S cm2­­­­ mol–1. 3 For CaCl2 Λ°m is 271.6 S cm2­­­­ mol–1 and for MgSO4 Λ°m is 133 S cm2­­­­ mol–1. 4 For CaCl2 Λ°m is 135.8 S cm2­­­­ mol–1 and for MgSO4 Λ°m is 133 S cm2­­­­ mol–1.

Subtopic:   Kohlrausch Law & Cell Constant |
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Λ°m for NaCl, HCl and NaAc are 126.4, 425.9 and 91.0 S cm2­­­­ mol–1 respectively. The value of Λ°m for HAc is-

1. 380.9 S cm
2­­­­ mol–1
2. 390.5 S cm
2­­­­ mol–1
3. 400 S cm
2­­­­ mol–1
4. 410.6 S cm
2­­­­ mol–1

Subtopic:   Kohlrausch Law & Cell Constant |
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The conductivity of 0.001028 mol L–1 acetic acid is 4.95 ×10–5 S cm–1if Λ°m for acetic acid is 390.5 S cm2­­­­ mol–1, Its dissociation constant value is-

1. 1.58 × 10–5 mol L–1
2. 1.78 × 10–5 mol L–1
3. 1.98 × 10–5 mol L–1
4. 2.18 × 10–5 mol L–1

Subtopic:   Kohlrausch Law & Cell Constant |
54%
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