Solve all the questions. thank you Q1:Calculate the cell potential of Cu-Fe galvanic cell at the followingdpanconditions:i)Standard conditionsii)When 90% of Cu2+ has been consumedQ2:Determine the cell potential for the following concentration cell:i)Cr(s) / Cr3+ (0.05M) // Cr3+ (2.0M)/ Cr(s)Zn | Zn2+ (1M) // Zn2+ (1M) | Znii)Q3:Calculate the equilibrium constant at 25°C for the reactionbetween zinc metal and acid.Zn + 2H+ →Zn2++ H2Q4:Calculate the solubility product at 25°C for Mg(OH),2.Mg(OH)2 + 2eMg2+ + 2e> Mg +20HE° = -2.69 V> MgE° = -2.38 VQ5:Identify the products at anode and cathode for electrolysis of:i)molten PbCl, saltii)aqueous Magnesium Sulphateiii)Mixture of molten MgBr + NaCIiv)Mixture solution of MgBr + NaclA copper electroplating process utilizes 15 A of current bychemically dissolving (corroding) a copper anode andelectroplating a copper cathode. If it is assumed that there areno side reactions, how long will it take to corrode 20g of copperfrom the anode? (Atomic mass of Cu: 64 g/mol)Q6:Calculate the volume of H, gas at 25°C and 1.00 atm that will becollected at the cathode when an aqueous solution of Na,SO, iselectrolyzed for 2.00 hours with a 10.0-amp current at 90%current efficiency.Q7:(Hint: use ideal gas law, PV=mRT) R = 0.08205 L.atm/mol.K%3DDetermine the oxidation number of the chromium in anunknown salt if electrolysis of a molten sample of this salt for1.50 hours with a 10.0-amp current deposits 9.71 grams ofchromium metal at the cathode.Q8:

Answered: Image /qna-images/answer/01fd4a44-9798-44f2-98f1-06e931405f0a.jpg

Answered: Calculate the cell potential of Cu-Fe…

Calculate the cell potential of Cu-Fe galvanic cell at the following conditions: i) Standard conditions ii) When 90% of Cu2+ has been consumed

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter23: Potentiometry

Section: Chapter Questions

Problem 23.14QAP

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Concept explainers

Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.

Question

Solve all the questions. thank you

Q1:
Calculate the cell potential of Cu-Fe galvanic cell at the following
dpan
conditions:
i)
Standard conditions
ii)
When 90% of Cu2+ has been consumed
Q2:
Determine the cell potential for the following concentration cell:
i)
Cr(s) / Cr3+ (0.05M) // Cr3+ (2.0M)/ Cr(s)
Zn | Zn2+ (1M) // Zn2+ (1M) | Zn
ii)
Q3:
Calculate the equilibrium constant at 25°C for the reaction
between zinc metal and acid.
Zn + 2H+ →
Zn2+
+ H2
Q4:
Calculate the solubility product at 25°C for Mg(OH),2.
Mg(OH)2 + 2e
Mg2+ + 2e
> Mg +
20H
E° = -2.69 V
> Mg
E° = -2.38 V
Q5:
Identify the products at anode and cathode for electrolysis of:
i)
molten PbCl, salt
ii)
aqueous Magnesium Sulphate
iii)
Mixture of molten MgBr + NaCI
iv)
Mixture solution of MgBr + Nacl
A copper electroplating process utilizes 15 A of current by
chemically dissolving (corroding) a copper anode and
electroplating a copper cathode. If it is assumed that there are
no side reactions, how long will it take to corrode 20g of copper
from the anode? (Atomic mass of Cu: 64 g/mol)
Q6:
Calculate the volume of H, gas at 25°C and 1.00 atm that will be
collected at the cathode when an aqueous solution of Na,SO, is
electrolyzed for 2.00 hours with a 10.0-amp current at 90%
current efficiency.
Q7:
(Hint: use ideal gas law, PV=mRT) R = 0.08205 L.atm/mol.K
%3D
Determine the oxidation number of the chromium in an
unknown salt if electrolysis of a molten sample of this salt for
1.50 hours with a 10.0-amp current deposits 9.71 grams of
chromium metal at the cathode.
Q8:

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