Electrolytic Conductance of Acids, Bases, and Salts
Chemistry ⇒ Acids, Bases, and Salts
Electrolytic Conductance of Acids, Bases, and Salts starts at 10 and continues till grade 12.
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See sample questions for grade 12
A 0.01 M solution of CH₃COOH has a molar conductance of 4.6 S cm² mol⁻¹ at 25°C. If its limiting molar conductance is 390.5 S cm² mol⁻¹, calculate its degree of ionization (α).
A solution contains 0.01 mol of KCl in 1 L. If its specific conductance is 1.5 × 10⁻² S cm⁻¹, calculate its molar conductance.
A solution of NaCl and KCl has a total molar conductance of 250 S cm² mol⁻¹ at infinite dilution. If Λm°(NaCl) = 126.4 S cm² mol⁻¹ and Λm°(KCl) = 149.9 S cm² mol⁻¹, what is the ratio of NaCl to KCl in the mixture?
Calculate the molar conductance at infinite dilution (Λm°) for NaCl if λ°(Na⁺) = 50.1 S cm² mol⁻¹ and λ°(Cl⁻) = 76.3 S cm² mol⁻¹.
Define specific conductance (κ).
Describe how you would experimentally determine the molar conductance of a weak acid at a given concentration.
Describe the effect of temperature on the electrolytic conductance of an aqueous solution.
Explain the difference between specific conductance and molar conductance.
Explain why the conductance of a salt solution is higher than that of pure water.
Explain why the conductance of a solution increases with dilution.
Explain why the conductance of pure water is very low.
Explain why the molar conductance of strong electrolytes increases only slightly with dilution.
Explain why weak acids have lower conductance than strong acids at the same concentration.
If the specific conductance of a 0.01 M NaCl solution at 25°C is 1.41 × 10⁻² S cm⁻¹, calculate its molar conductance (Λm).
State Kohlrausch’s Law of Independent Migration of Ions.
State one reason why the conductance of a solution of a weak base increases more rapidly with dilution than that of a strong base.
State the relationship between molar conductance and concentration for a weak electrolyte.
The limiting molar conductance of NH₄Cl, NaOH, and NaCl at 25°C are 129.8, 217.4, and 126.4 S cm² mol⁻¹, respectively. Calculate the limiting molar conductance of NH₄OH at 25°C.
