Same chapter3 marksDifficulty: Medium
Calculate the emf of the cell Zn | Zn2+(1 M) || Cu2+(1 M) | Cu, given E° for Zn2+/Zn = −0.76 V and for Cu2+/Cu = +0.34 V.
Electrochemistry
3 marksDifficulty: Medium
State Kohlrausch's law and give one use of it.
Original Khojo Papers practice question — not from a past board paper.
Answer
Kohlrausch's law states that the limiting molar conductivity of an electrolyte is the sum of the individual contributions of its cation and anion. It is used to find the limiting molar conductivity of a weak electrolyte, which cannot be obtained by extrapolation, and hence its degree of dissociation.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
It also allows the solubility of a sparingly soluble salt to be calculated from conductance measurements.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
What is corrosion, and how does the electrochemical theory explain the rusting of iron?
Electrochemistry
Same chapter3 marksDifficulty: Medium
State the Nernst equation for an electrode and explain the terms in it.
Electrochemistry
Same chapter3 marksDifficulty: Medium
Calculate the mass of copper deposited when a current of 2 A is passed through copper sulphate solution for 30 minutes. (Cu = 63.5, F = 96,500 C)
Electrochemistry
Same chapter3 marksDifficulty: Medium
Distinguish between a galvanic cell and an electrolytic cell.
Electrochemistry
Same subject3 marksDifficulty: Medium
What is the van't Hoff factor, and what values does it take for sodium chloride and for acetic acid in benzene?
Solutions