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96500 coulombs correspond to the charge on how many electrons?
Concept: Electrolytic Cells and Electrolysis - Introduction
Can copper sulphate solution be stored in an iron vessel? Explain.
Concept: Galvanic or Voltaic Cells - Introduction
Resistance of conductivity cell filled with 0.1 M KCl solution is 100 ohms. If the resistance of the same cell when filled with 0.02 M KCl solution is 520 ohms, calculate the conductivity and molar conductivity of 0.02 M KCl solution. [Given: Conductivity of 0.1 M KCl solution is 1.29 S m-1 .]
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
The molar conductivity of cation and anion of salt BA are 180 and 220 mhos respectively. The molar conductivity of salt BA at infinite dilution is_____________ .
(a) 90 mhos.cm2
(b) 110 mhos.cm2.mol-1
(c) 200 mhos.cm2.mol-1
(d) 400 mhos.cm2.mol-1
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
What is the value of for the following reaction at 298 K -
6CO2+ 6H20(l) → C6H1206(s) + 602(g),
Given that: ΔG° = 2879 kj mol-1, AS = -210 JK-1 mol-1.
Concept: Relation Between Gibbs Energy Change and Emf of a Cell
Write any four applications of electrochemical series
Concept: Electrolytic Cells and Electrolysis - Introduction
With the help of the equation ΔG° = - nFEocell. Explain that cell potential is an intensive property.
Concept: Relation Between Gibbs Energy Change and Emf of a Cell
How much electricity in terms of Faraday is required to produce 20 g of Ca from molten CaCl2?
(Given: Molar mass of Calcium is 40 g mol−1.)
Concept: Electrolytic Cells and Electrolysis - Introduction
The conductivity of 0.20 M solution of KCl at 298 K is 0.025 S cm−1. Calculate its molar conductivity.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
The standard e.m.f of the following cell is 0.463 V
`Cu|Cu_(1m)^(++)`
What is the standard potential of Cu electrode?
(A) 1.137 V
(B) 0.337 V
(C) 0.463 V
(D) - 0.463 V
Concept: Galvanic or Voltaic Cells - Introduction
State Kohlrausch Law.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
Write cell reaction in lead storage battery during discharge.
Concept: Batteries >> Primary Batteries
Prove that ΔH=ΔU+ΔnRT. what is the condition under which ΔU=ΔH?
Concept: Chemical Thermodynamics and Energetic >> First Law of Thermodynamics
Derive a relation between ΔH and ΔU for a chemical reaction. Draw neat labelled diagram of calomel electrode. Resistance and conductivity of a cell containing 0.001 M KCI solution at 298K are 1500Ω and 1.46x10-4 S.cm-1 respectively.
Concept: Electrochemical Cells
Number of faradays of electricity required to liberate 12 g of hydrogen is:
Concept: Electrolytic Cells and Electrolysis - Introduction
Calculate E°cell for the following reaction at 298 K:
2Al(s) + 3Cu+2(0.01M) → 2Al+3(0.01M) + 3Cu(s)
Given: Ecell = 1.98V
Concept: Galvanic or Voltaic Cells - Introduction
The conductivity of 0.001 mol L-1 solution of CH3COOH is 3.905× 10-5 S cm-1. Calculate its molar conductivity and degree of dissociation (α) Given λ°(H+)= 349.6 S cm2 mol-1 and λ°(CH3COO)= 40.9S cm2mol-1.
Concept: Conductance of Electrolytic Solutions >> Variation of Conductivity and Molar Conductivity with Concentration
Define electrochemical cell
Concept: Batteries >> Primary Batteries
Following reactions occur at cathode during the electrolysis of aqueous sodium chloride solution:
Na+(aq) + e− ⟶ Na (s) E0 = 2.71 V
H+(aq) + e− ⟶ `1/2` H2 (g) E0 = 0.00 V
On the basis of their standard reduction electrode potential (E0) values, which reaction is feasible at the cathode and why?
Concept: Electrolytic Cells and Electrolysis - Introduction
Why does the cell potential of mercury cell remain constant throughout its life?
Concept: Batteries >> Primary Batteries
