Answer: 391 S cm2 mol-1.
- A 217 S cm2 mol-1
- B 300 S cm2 mol-1
- C 391 S cm2 mol-1
- D 461 S cm2 mol-1
Correct answer: C. 391 S cm2 mol-1
Explanation: By Kohlrausch law, lambda°(CH3COOH) = lambda°(HCl) + lambda°(CH3COONa) - lambda°(NaCl) = 426 + 91 - 126 = 391.
In a Daniell cell, electrons flow externally from the zinc anode (oxidation) through the voltmeter to the copper cathode (reduction), while the salt bridge completes the circuit.
Concept context
Explore the link between chemical reactions and electricity. Covers galvanic cells, electrolysis, standard electrode potentials, the Nernst equation, and real-world applications like batteries and corrosion.