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Consider an electrochemical cell based on the half-reactions Ni 2+ (aq) + 2 e − → Ni(s) and Cd 2+ (aq) + 2 e − → Cd(s). (a) Diagram the cell, and label each of the components (including the anode, cathode, and salt bridge). (b) Use the equations for the half-reactions to write a balanced, net ionic equation for the overall cell reaction. (c) What is the polarity of each electrode? (d) What is the value of E ° cell ? (e) In which direction do electrons flow in the external circuit? (f) Assume that a salt bridge containing NaNO 3 connects the two half-cells. In which direction do the Na + (aq) ions move? In which direction do the NO 3 − (aq) ions move? (g) Calculate the equilibrium constant for the reaction. (h) If the concentration of Cd 2+ is reduced to 0.010 M and [Ni 2+ ] = 1.0 M, what is the value of E cell ? Is the net reaction still the reaction given in part (b)? (i) If 0.050 A is drawn from the battery, how long can it last if you begin with 1.0 L of each of the solutions and each was initially 1.0 M in dissolved species? Each electrode weighs 50.0 g in the beginning.

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Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

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Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 19, Problem 99IL
Textbook Problem
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Consider an electrochemical cell based on the half-reactions Ni2+(aq) + 2 e → Ni(s) and Cd2+(aq) + 2e → Cd(s).

  1. (a) Diagram the cell, and label each of the components (including the anode, cathode, and salt bridge).
  2. (b) Use the equations for the half-reactions to write a balanced, net ionic equation for the overall cell reaction.
  3. (c) What is the polarity of each electrode?
  4. (d) What is the value of E°cell?
  5. (e) In which direction do electrons flow in the external circuit?
  6. (f) Assume that a salt bridge containing NaNO3 connects the two half-cells. In which direction do the Na+(aq) ions move? In which direction do the NO3 (aq) ions move?
  7. (g) Calculate the equilibrium constant for the reaction.
  8. (h) If the concentration of Cd2+ is reduced to 0.010 M and [Ni2+] = 1.0 M, what is the value of Ecell? Is the net reaction still the reaction given in part (b)?
  9. (i) If 0.050 A is drawn from the battery, how long can it last if you begin with 1.0 L of each of the solutions and each was initially 1.0 M in dissolved species? Each electrode weighs 50.0 g in the beginning.

(a)

Interpretation Introduction

Interpretation:

The half reactions are as follows.

Ni2+(aq) + 2e- Ni(s) and Cd2+(aq)+2e- Cd(s)

The cell has to be drawn and label each of the component.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________                                       Half cell             Half cell

Explanation of Solution

The half reactions are as follows.

Ni2+(aq) + 2e- Ni(s) and Cd

(b)

Interpretation Introduction

Interpretation:

To determine the following.

The half reactions are as follows.

Ni2+(aq) + 2e- Ni(s) and Cd2+(aq)+2e- Cd(s)

The balance equation has to be given.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________                                       Half cell             Half cell

(c)

Interpretation Introduction

Interpretation:

The half reactions are as follows.

Ni2+(aq) + 2e- Ni(s) and Cd2+(aq)+2e- Cd(s)

The polarity of each electrode has to be determined.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________                                       Half cell             Half cell

(d)

Interpretation Introduction

Interpretation:

The half reactions are as follows.

Ni2+(aq) + 2e- Ni(s) and Cd2+(aq)+2e- Cd(s)

The Ecello has to be calculated.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________                                       Half cell             Half cell

 (e)

Interpretation Introduction

Interpretation:

The half reactions are as follows.

Ni2+(aq) + 2e- Ni(s) and Cd2+(aq)+2e- Cd(s)

The direction in which electrons flow in the external circuit has to be given.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________                                       Half cell             Half cell

(f)

Interpretation Introduction

Interpretation:

To determine the following.

The half reactions are as follows.

Ni2+(aq) + 2e- Ni(s) and Cd2+(aq)+2e- Cd(s)

Assume that a salt bride containing NaNO3 connect the two half cells. It has to be identified in which direction do Na+(aq) ions and NO3- (aq) move.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________                                       Half cell             Half cell

(g)

Interpretation Introduction

Interpretation:

The half reactions are as follows.

Ni2+(aq) + 2e- Ni(s) and Cd2+(aq)+2e- Cd(s)

The equilibrium constant has to be determined.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________                                       Half cell             Half cell

(h)

Interpretation Introduction

Interpretation:

The half reactions are as follows.

Ni2+(aq) + 2e- Ni(s) and Cd2+(aq)+2e- Cd(s)

If the concentration of Cd2+(aq) is reduced to 0.010 M and [Ni2+]=1.0 M. The Ecello of the reaction has to be calculated.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________                                       Half cell             Half cell

(i)

Interpretation Introduction

Interpretation:

The half reactions are as follows.

Ni2+(aq) + 2e- Ni(s) and Cd2+(aq)+2e- Cd(s)

The time the battery will last if 0.050 M is drawn from the battery has to be determined.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________                                       Half cell             Half cell

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Chapter 19 Solutions

Chemistry & Chemical Reactivity
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Ch. 19.3 - Which of the following statements is correct for...Ch. 19.3 - 2. You can determine if an automobile lead-based...Ch. 19.4 - (a) Rank the following metals in their ability to...Ch. 19.4 - The net reaction that occurs in a voltaic cell is...Ch. 19.4 - 2. Which metal in the following list is easiest to...Ch. 19.4 - Determine which of the following redox equations...Ch. 19.4 - A lithium ion battery produces a voltage of 3.6 V....Ch. 19.4 - Use the energy produced by the combustion of...Ch. 19.4 - What mass of lithium ion batteries would produce...Ch. 19.5 - A voltaic cell is set up with an aluminum...Ch. 19.5 - Check Your Understanding The half-cells Fe2+(aq,...Ch. 19.5 - 1. Calculate Ecell at 298 K for a cell involving...Ch. 19.6 - The following reaction has an E value of 0.76 V:...Ch. 19.6 - Calculate the equilibrium constant at 25 C for the...Ch. 19.6 - 1. 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(a) Zn(s) +...Ch. 19 - Magnesium metal is oxidized, and silver ions are...Ch. 19 - You want to set up a series of voltaic cells with...Ch. 19 - You want to set up a series of voltaic cells with...Ch. 19 - Which of the following reactions is (arc) product...Ch. 19 - In the table of standard reduction potentials,...Ch. 19 - In the table of standard reduction potentials,...Ch. 19 - Four voltaic cells are set up. In each, one...Ch. 19 - The following half-cells are available: (i)...Ch. 19 - The reaction occurring in the cell in which Al2O3...Ch. 19 - A cell is constructed using the following...Ch. 19 - A potential of 0.142 V is recorded (under standard...Ch. 19 - What is the value of E for the following...Ch. 19 - The standard potential, E, for the reaction of...Ch. 19 - An electrolysis cell for aluminum production...Ch. 19 - Electrolysis of molten NaCl is done in cells...Ch. 19 - A current of 0.0100 A is passed through a solution...Ch. 19 - A current of 0.44 A is passed through a solution...Ch. 19 - The total charge that ran he delivered by a large...Ch. 19 - Chlorine gas is obtained commercially by...Ch. 19 - Write equations for the half-reactions that occur...Ch. 19 - The products formed in the electrolysis of aqueous...Ch. 19 - Predict the products formed in the electrolysis of...Ch. 19 - In the electrolysis of HNO3(aq), hydrogen is...Ch. 19 - The metallurgy of aluminum involves electrolysis...Ch. 19 - Two half-cells, Pt | Fe3+(aq. 0.50 M), Fe2+(aq,...Ch. 19 - A voltaic cell is set up utilizing the reaction...Ch. 19 - Calculate the cell potential for the following...Ch. 19 - A voltaic cell set up utilizing the reaction Cu(s)...Ch. 19 - Two Ag+(aq) | Ag(s) half-cells are constructed....Ch. 19 - Calculate equilibrium constants for the following...Ch. 19 - Calculate equilibrium constants for the following...Ch. 19 - Use the table of standard reduction potentials...Ch. 19 - Use the table of standard reduction potentials...Ch. 19 - Write balanced equations for the following...Ch. 19 - Balance the following equations involving organic...Ch. 19 - A voltaic cell is constructed in which one...Ch. 19 - An expensive but lighter alternative to the lead...Ch. 19 - The specifications for a lead storage battery...Ch. 19 - Manganese may play an important role in chemical...Ch. 19 - You want to use electrolysis to plate a...Ch. 19 - Iron(II) ion undergoes a disproportionation...Ch. 19 - Copper(I) ion disproportionates to copper metal...Ch. 19 - The simplest way to write the reaction for...Ch. 19 - A lithium-ion camera battery is rated at 7500 mAh....Ch. 19 - Consider an electrochemical cell based on the...Ch. 19 - An old method of measuring the current flowing in...Ch. 19 - A silver coulometer (Study Question 106) was used...Ch. 19 - Four metals, A, B, C, and D, exhibit the following...Ch. 19 - A solution of KI is added dropwise to a pale blue...Ch. 19 - The amount of oxygen, O2, dissolved in a water...Ch. 19 - Fluorinated organic compounds are used as...Ch. 19 - The free energy change for a reaction, rG, is the...Ch. 19 - A hydrogen-oxygen fuel cell operates on the simple...Ch. 19 - (a) Is it easier to reduce water in acid or base?...Ch. 19 - Living organisms derive energy from the oxidation...

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