DAYANAND SCIENCE COLLEGE, LATUR 8
DAYANAND SCIENCE COLLEGE, LATUR
St. XII - CET : 2020-21
Worksheet - Dt. 29.10.2020
Chemistry - Electrochemistry
01. How many es flow through a metallic wire if a 08. Define electrochemical series ?
current of 0.5 A is passed for 2 h ?
09. Arrange following metals in an increasing
02. Which reaction occur at anode and why ? order of their reducing power.
a) 2H 2O (l)
O 2(g) 4H (aq) 4e SRP of metals are
E° = 1.23 V a) K+ | K = – 2.93 V
b) Ag+ | Ag = 0.80 V
b) 2Br(aq)
Br2(g) 2e
c) Cu2+ | Cu = 0.34 V
E° = 1.08 V
d) Mg2+ | Mg = – 2.37 V
03. A solution of CuSO4 is electrolysed for 10 min with
a current of 1.5 A. What is the mass of copper e) Cr2+ | Cr = – 0.74 V
deposited at the cathode ?
10. Give any two application of electrochemical
04. Calculate m for acetic acid given that series.
m (HCl) = 426 s cm2 mol–1
m (NaCl) = 126 s cm2 mol–1
m (CH3 COONa) = 91 s cm2 mol–1
05. Calculate the degree of dissociation of acetic acid
at 290 K, given that
m (CH3COOH) = 11.7 s cm2 mol–1
m (CH3 COO) = 40.9 s cm2 mol–1
m (H+) = 349.1 s cm2 mol–1
06. Conductivity of 2.5 × 10–4 M methanoic acid
is 5.25 × 10–5 s cm–1. Calculate its molar
conductivity and degree of dissociation.
07. The conductivity of 0.001 M acetic acid is
4 × 10–5 s cm–1. Calculate the dissociation
constant of acetic acid if molar conductivity
of infinite dilution for acetic acid is 390 s
cm2 mol–1 ?
DAYANAND SCIENCE COLLEGE, LATUR
St. XII - CET : 2020-21
Worksheet - Dt. 29.10.2020
Chemistry - Electrochemistry
01. How many es flow through a metallic wire if a 08. Define electrochemical series ?
current of 0.5 A is passed for 2 h ?
09. Arrange following metals in an increasing
02. Which reaction occur at anode and why ? order of their reducing power.
a) 2H 2O (l)
O 2(g) 4H (aq) 4e SRP of metals are
E° = 1.23 V a) K+ | K = – 2.93 V
b) Ag+ | Ag = 0.80 V
b) 2Br(aq)
Br2(g) 2e
c) Cu2+ | Cu = 0.34 V
E° = 1.08 V
d) Mg2+ | Mg = – 2.37 V
03. A solution of CuSO4 is electrolysed for 10 min with
a current of 1.5 A. What is the mass of copper e) Cr2+ | Cr = – 0.74 V
deposited at the cathode ?
10. Give any two application of electrochemical
04. Calculate m for acetic acid given that series.
m (HCl) = 426 s cm2 mol–1
m (NaCl) = 126 s cm2 mol–1
m (CH3 COONa) = 91 s cm2 mol–1
05. Calculate the degree of dissociation of acetic acid
at 290 K, given that
m (CH3COOH) = 11.7 s cm2 mol–1
m (CH3 COO) = 40.9 s cm2 mol–1
m (H+) = 349.1 s cm2 mol–1
06. Conductivity of 2.5 × 10–4 M methanoic acid
is 5.25 × 10–5 s cm–1. Calculate its molar
conductivity and degree of dissociation.
07. The conductivity of 0.001 M acetic acid is
4 × 10–5 s cm–1. Calculate the dissociation
constant of acetic acid if molar conductivity
of infinite dilution for acetic acid is 390 s
cm2 mol–1 ?
