Question 1

Consider the following standard reduction potentials, Ni²⁺(aq)+ 2 e^- → Ni(s)E° = - 0.26 V I₂(s)+ 2 e^- → 2 I^-(aq)E° = +0.54 V Under standard conditions,

Accepted Answer

According to the reduction potentials, the species with higher reduction potential (more positive E°) is a stronger reducing agent and the species with lower reduction potential (more negative E°) is a stronger oxidizing agent. Here, I₂(s) has a higher reduction potential than Ni²⁺(aq) and Ni(s), so it is a stronger reducing agent than both of them. Similarly, Ni²⁺(aq) has a lower reduction potential than I^-(aq), so it is a stronger oxidizing agent than I₂(s). Therefore, option B is the correct choice.

Question 2

What is the shorthand notation that represents the following galvanic cell reaction? Pb(s)+ Cu(NO₃)₂(aq)→ Pb(NO₃)₂(aq)+ Cu(s)

Accepted Answer

The correct shorthand notation for the given galvanic cell reaction starts with the anode (oxidation half-reaction) on the left and the cathode (reduction half-reaction) on the right. Since Pb is oxidized to Pb^2+ and Cu^2+ is reduced to Cu, the notation is Pb(s) | Pb^2+(aq) || Cu^2+(aq) | Cu(s).

Question 3

A galvanic cell consists of one half-cell that contains Ag(s)and Ag⁺(aq),and one half-cell that contains Cu(s)and Cu²⁺(aq).What species are produced at the electrodes under standard conditions? Ag⁺(aq)+ e^- → Ag(s)E° = +0.80 V Cu²⁺(aq)+ 2 e^- → Cu(s)E° = +0.34 V

Accepted Answer

At the cathode (reduction half-reaction), Ag⁺(aq) gains an electron and forms Ag(s), so Ag(aq) is not formed at the cathode. At the anode (oxidation half-reaction), Cu(s) loses two electrons to form Cu²⁺(aq), so Cu²⁺(aq) is formed at the anode. Therefore, option B is the correct answer.

Question 4

How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NICl₂ for 60.0 minutes?

Accepted Answer

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Question 5

Calculate the value of the reaction quotient,Q,for the galvanic cell expressed using shorthand notation below.Use the balanced chemical equation that has the smallest whole number stoichiometric coefficients. Zn(s)∣ Zn²⁺(aq,0.0100 M)∣∣ Ag⁺(aq,1.15 M)∣ Ag(s)

Accepted Answer

The balanced chemical equation for the cell reaction is:

Zn(s) + Ag+(aq) → Zn2+(aq) + Ag(s)

The cell notation shows that the concentrations of the species involved in the reaction are:

[Zn2+] = 0.0100 M (in the left half-cell)
[Ag+] = 1.15 M (in the right half-cell)

The reaction quotient, Q, is given by the formula:

Q = [Zn2+]/[Ag+]

Substituting the values, we get:

Q = 0.0100 M / 1.15 M
Q = 8.70 × 10^-3

Therefore, the best choice is D, 7.56 × 10^-3.

Question 6

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr³⁺ ions for 320.minutes?

Accepted Answer

The amount of chromium plated out can be calculated using Faraday's laws of electrolysis. The mass of a substance deposited at an electrode is directly proportional to the amount of electric charge passed through the electrolyte. The formula to calculate the mass is $m = \frac{ItM}{nF}$, where $m$ is the mass of the substance (in grams), $I$ is the current (in amperes), $t$ is the time (in seconds), $M$ is the molar mass of the substance (in g/mol), $n$ is the number of electrons transferred in the reaction, and $F$ is Faraday's constant ($96485 C/mol$).Given:- $I = 8.00 A$- $t = 320 \text{ minutes} = 320 \times 60 \text{ seconds}$- $M$ for chromium ($Cr$) is approximately $52 g/mol$- $n = 3$ (since chromium goes from a $+3$ charge in $Cr^{3+}$ to $0$ in the metal form)Plugging these values into the formula:$$m = \frac{8.00 \times (320 \times 60) \times 52}{3 \times 96485}$$$$m \approx 27.6 g$$Therefore, 27.6 grams of chromium metal are plated out.

Question 7

Using the following standard reduction potentials, Fe³⁺(aq)+ e^- → Fe²⁺(aq)E° = +0.77 V Ni²⁺(aq)+ 2 e^- →Ni(s)E° = -0.26 V Calculate the standard cell potential for the cell reaction given below,and determine whether or not this reaction is spontaneous under standard conditions. Ni²⁺(aq)+ 2 Fe²⁺(aq)→ 2 Fe³⁺(aq)+ Ni(s)

Accepted Answer

The standard cell potential can be calculated by using the standard reduction potentials of the half-reactions as follows:
E°cell = E°cathode - E°anode
E°cell = (-0.26 V) - (+0.77 V)
E°cell = -1.03 V
Since the calculated E°cell is negative, the reaction is nonspontaneous under standard conditions. Therefore, the best choice is A.

Question 8

A galvanic cell uses the reaction Mg(s)+ Pb²⁺(aq)→ Mg²⁺(aq)+ Pb(s). Mg(s)→ Mg²⁺(aq)+ 2 e^-is the ________ half-reaction,which occurs at the ________.

Accepted Answer

The answer of A galvanic cell uses the reaction Mg(s)+ Pb²⁺(aq)→...

Question 9

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)∣ Al³⁺(aq)∣∣ Fe²⁺(aq)∣ Fe(s)

Accepted Answer

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Question 10

How long must a constant current of 50.0 A be passed through an electrolytic cell containing aqueous Cu²⁺ ions to produce 5.00 moles of copper metal?

Accepted Answer

The answer of How long must a constant current of...

Question 11

Based on the following information, Cl₂(g)+ 2 e^- → 2 Cl^-(aq)E° = + 1.36 V Mg²⁺(aq)+ 2 e^- → 2 Mg(s)E° = -2.37 V Which of the following chemical species is the strongest reducing agent?

Accepted Answer

The strongest reducing agent is the species with the most negative standard reduction potential (E°) value. In this case, Mg has the most negative value (-2.37 V), therefore it is the strongest reducing agent.

Question 12

A galvanic cell consists of a Ni²⁺/ Ni half-cell and a standard hydrogen electrode.If the Ni²⁺/ Ni half-cell standard cell functions as the anode,and the standard cell potential is 0.26 V,what is the standard reduction potential for the Ni²+/ Ni half-cell?

Accepted Answer

The standard hydrogen electrode has a potential of 0 V. Since the Ni²⁺/Ni half-cell is the anode, it undergoes oxidation, and its standard reduction potential is the negative of the cell potential, which is -0.26 V.

Question 13

What is the balanced equation for the galvanic cell reaction expressed using shorthand notation below? Ni(s)∣ Ni²⁺(aq)∣∣ Cl₂(g)∣ Cl^-(aq)∣ C(s)

Accepted Answer

The shorthand notation shows that Ni(s) is connected to Ni²⁺(aq) through a single vertical line, indicating that they are in the same phase. Similarly, Cl^-(aq) is connected to Cl₂(g) through a double line, indicating that they are in different phases. This suggests that Ni(s) and Cl₂(g) are the reactants, and Ni²⁺(aq) and Cl^-(aq) are the products. The balanced equation based on this is: Ni(s) + 2Cl^-(aq) → Ni²⁺(aq) + 2Cl^-(aq) + Cl₂(g) which can be simplified to: Ni(s) + Cl₂(g) → Ni²⁺(aq) + 2Cl^-(aq)

Question 14

What is the shorthand notation that represents the following galvanic cell reaction? 2 Fe²⁺(aq)+ F₂(g)→ 2 Fe³⁺(aq)+ 2 F^-(aq)

Accepted Answer

This choice represents the galvanic cell reaction using the shorthand notation convention. The left half-cell consists of the Fe^{2 and} species in one compartment and the Fe^{3 and} species in another compartment, both connected by a Pt electrode. The right half-cell consists of the F₂ gas and F^- species in one compartment and a C electrode in the other compartment, connected by a Pt electrode. The double bars represent a salt bridge or other means of allowing ion transfer between the compartments to maintain charge balance.

Question 15

In the shorthand notation for a galvanic cell,a single vertical line (|)represents a ________,and a double vertical line (||)represents a ________.

Accepted Answer

The answer of In the shorthand notation for a galvanic...

Question 16

The gas OF₂ can be produced from the electrolysis of an aqueous solution of KF,as shown in the equation below. OF₂(g)+ 2 H⁺(aq)+ 4 e^- → H₂O(l)+ 2 F^-(aq)E° = +2.15 V Using the given standard reduction potential,calculate the amount of OF₂ that is produced,and the electrode at which the OF₂ is produced,upon the passage of 0.480 faradays through an aqueous KF solution.

Accepted Answer

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Question 17

For the galvanic cell reaction,expressed below using shorthand notation,what half-reaction occurs at the cathode? Zn(s)∣ Zn²⁺(aq)∣∣ Ni²⁺(aq)∣ Ni(s)

Accepted Answer

In a galvanic cell, the cathode is where reduction occurs. The correct half-reaction at the cathode for the given cell notation is the reduction of Ni^2+ ions to Ni(s), which is represented by choice D.

Question 18

In the galvanic cell represented by the shorthand notation Al(s)|Al³⁺(aq)||Fe³⁺(aq)|Fe(s) the anode is ________ and the cathode is ________.

Accepted Answer

The answer of In the galvanic cell represented by the...

Question 19

Consider the galvanic cell,Zn(s)∣ Zn²⁺(aq)∣∣ Pb²⁺(aq)∣ Pb(s).Which one of the following changes to the cell would cause the cell potential to increase (i.e. ,become more positive)?

Accepted Answer

Increasing the concentration of Pb²⁺ increases the cell potential because it shifts the equilibrium towards the reduction of Pb²⁺ to Pb, making the cell potential more positive according to the Nernst equation.

Question 20

In the galvanic cell represented by the shorthand notation shown below Pb(aq)| Pb²⁺(aq)| Cl₂(g)|Cl^-(aq)| Pt(s) the inert electrode is ________,and the balanced cathode half-reaction reaction is ________.

Accepted Answer

The answer of In the galvanic cell represented by the...

Quiz 17: Electrochemistry

Consider the following standard reduction potentials, Ni²⁺(aq) + 2 e^- → Ni(s) E° = - 0.26 V I₂(s) + 2 e^- → 2 I^-(aq) E° = +0.54 V Under standard conditions,

What is the shorthand notation that represents the following galvanic cell reaction? Pb(s) + Cu(NO₃) ₂(aq) → Pb(NO₃) ₂(aq) + Cu(s)

A galvanic cell consists of one half-cell that contains Ag(s) and Ag⁺(aq) ,and one half-cell that contains Cu(s) and Cu²⁺(aq) .What species are produced at the electrodes under standard conditions? Ag⁺(aq) + e^- → Ag(s) E° = +0.80 V Cu²⁺(aq) + 2 e^- → Cu(s) E° = +0.34 V

How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NICl₂ for 60.0 minutes?

Calculate the value of the reaction quotient,Q,for the galvanic cell expressed using shorthand notation below.Use the balanced chemical equation that has the smallest whole number stoichiometric coefficients. Zn(s) ∣ Zn²⁺(aq,0.0100 M) ∣∣ Ag⁺(aq,1.15 M) ∣ Ag(s)

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr³⁺ ions for 320.minutes?

A galvanic cell uses the reaction Mg(s)+ Pb²⁺(aq)→ Mg²⁺(aq)+ Pb(s). Mg(s)→ Mg²⁺(aq)+ 2 e^-is the half-reaction,which occurs at the .

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s) ∣ Al³⁺(aq) ∣∣ Fe²⁺(aq) ∣ Fe(s)

How long must a constant current of 50.0 A be passed through an electrolytic cell containing aqueous Cu²⁺ ions to produce 5.00 moles of copper metal?

Based on the following information, Cl₂(g) + 2 e^- → 2 Cl^-(aq) E° = + 1.36 V Mg²⁺(aq) + 2 e^- → 2 Mg(s) E° = -2.37 V Which of the following chemical species is the strongest reducing agent?

A galvanic cell consists of a Ni²⁺/ Ni half-cell and a standard hydrogen electrode.If the Ni²⁺/ Ni half-cell standard cell functions as the anode,and the standard cell potential is 0.26 V,what is the standard reduction potential for the Ni²+/ Ni half-cell?

What is the balanced equation for the galvanic cell reaction expressed using shorthand notation below? Ni(s) ∣ Ni²⁺(aq) ∣∣ Cl₂(g) ∣ Cl^-(aq) ∣ C(s)

What is the shorthand notation that represents the following galvanic cell reaction? 2 Fe²⁺(aq) + F₂(g) → 2 Fe³⁺(aq) + 2 F^-(aq)

In the shorthand notation for a galvanic cell,a single vertical line (|)represents a ,and a double vertical line (||)represents a .

For the galvanic cell reaction,expressed below using shorthand notation,what half-reaction occurs at the cathode? Zn(s) ∣ Zn²⁺(aq) ∣∣ Ni²⁺(aq) ∣ Ni(s)

In the galvanic cell represented by the shorthand notation Al(s)|Al³⁺(aq)||Fe³⁺(aq)|Fe(s) the anode is and the cathode is .

Consider the galvanic cell,Zn(s) ∣ Zn²⁺(aq) ∣∣ Pb²⁺(aq) ∣ Pb(s) .Which one of the following changes to the cell would cause the cell potential to increase (i.e. ,become more positive) ?

In the galvanic cell represented by the shorthand notation shown below Pb(aq)| Pb²⁺(aq)| Cl₂(g)|Cl^-(aq)| Pt(s) the inert electrode is ,and the balanced cathode half-reaction reaction is .

Quiz 17: Electrochemistry

Consider the following standard reduction potentials, Ni2+(aq) + 2 e- → Ni(s) E° = - 0.26 V I2(s) + 2 e- → 2 I-(aq) E° = +0.54 V Under standard conditions,

What is the shorthand notation that represents the following galvanic cell reaction? Pb(s) + Cu(NO3) 2(aq) → Pb(NO3) 2(aq) + Cu(s)

A galvanic cell consists of one half-cell that contains Ag(s) and Ag+(aq) ,and one half-cell that contains Cu(s) and Cu2+(aq) .What species are produced at the electrodes under standard conditions? Ag+(aq) + e- → Ag(s) E° = +0.80 V Cu2+(aq) + 2 e- → Cu(s) E° = +0.34 V

How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NICl2 for 60.0 minutes?

Calculate the value of the reaction quotient,Q,for the galvanic cell expressed using shorthand notation below.Use the balanced chemical equation that has the smallest whole number stoichiometric coefficients. Zn(s) ∣ Zn2+(aq,0.0100 M) ∣∣ Ag+(aq,1.15 M) ∣ Ag(s)

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr3+ ions for 320.minutes?

A galvanic cell uses the reaction Mg(s)+ Pb2+(aq)→ Mg2+(aq)+ Pb(s). Mg(s)→ Mg2+(aq)+ 2 e- is the ________ half-reaction,which occurs at the ________.

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s) ∣ Al3+(aq) ∣∣ Fe2+(aq) ∣ Fe(s)

How long must a constant current of 50.0 A be passed through an electrolytic cell containing aqueous Cu2+ ions to produce 5.00 moles of copper metal?

Based on the following information, Cl2(g) + 2 e- → 2 Cl-(aq) E° = + 1.36 V Mg2+(aq) + 2 e- → 2 Mg(s) E° = -2.37 V Which of the following chemical species is the strongest reducing agent?

A galvanic cell consists of a Ni2+/ Ni half-cell and a standard hydrogen electrode.If the Ni2+/ Ni half-cell standard cell functions as the anode,and the standard cell potential is 0.26 V,what is the standard reduction potential for the Ni2+/ Ni half-cell?

What is the balanced equation for the galvanic cell reaction expressed using shorthand notation below? Ni(s) ∣ Ni2+(aq) ∣∣ Cl2(g) ∣ Cl-(aq) ∣ C(s)

What is the shorthand notation that represents the following galvanic cell reaction? 2 Fe2+(aq) + F2(g) → 2 Fe3+(aq) + 2 F-(aq)

In the shorthand notation for a galvanic cell,a single vertical line (|)represents a ________,and a double vertical line (||)represents a ________.

For the galvanic cell reaction,expressed below using shorthand notation,what half-reaction occurs at the cathode? Zn(s) ∣ Zn2+(aq) ∣∣ Ni2+(aq) ∣ Ni(s)

In the galvanic cell represented by the shorthand notation Al(s)|Al3+(aq)||Fe3+(aq)|Fe(s) the anode is ________ and the cathode is ________.

Consider the galvanic cell,Zn(s) ∣ Zn2+(aq) ∣∣ Pb2+(aq) ∣ Pb(s) .Which one of the following changes to the cell would cause the cell potential to increase (i.e. ,become more positive) ?

In the galvanic cell represented by the shorthand notation shown below Pb(aq)| Pb2+(aq)| Cl2(g)|Cl-(aq)| Pt(s) the inert electrode is ________,and the balanced cathode half-reaction reaction is ________.

Consider the following standard reduction potentials, Ni²⁺(aq) + 2 e^- → Ni(s) E° = - 0.26 V I₂(s) + 2 e^- → 2 I^-(aq) E° = +0.54 V Under standard conditions,

What is the shorthand notation that represents the following galvanic cell reaction? Pb(s) + Cu(NO₃) ₂(aq) → Pb(NO₃) ₂(aq) + Cu(s)

A galvanic cell consists of one half-cell that contains Ag(s) and Ag⁺(aq) ,and one half-cell that contains Cu(s) and Cu²⁺(aq) .What species are produced at the electrodes under standard conditions? Ag⁺(aq) + e^- → Ag(s) E° = +0.80 V Cu²⁺(aq) + 2 e^- → Cu(s) E° = +0.34 V

How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NICl₂ for 60.0 minutes?

Calculate the value of the reaction quotient,Q,for the galvanic cell expressed using shorthand notation below.Use the balanced chemical equation that has the smallest whole number stoichiometric coefficients. Zn(s) ∣ Zn²⁺(aq,0.0100 M) ∣∣ Ag⁺(aq,1.15 M) ∣ Ag(s)

How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr³⁺ ions for 320.minutes?

A galvanic cell uses the reaction Mg(s)+ Pb²⁺(aq)→ Mg²⁺(aq)+ Pb(s). Mg(s)→ Mg²⁺(aq)+ 2 e^-is the half-reaction,which occurs at the .

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s) ∣ Al³⁺(aq) ∣∣ Fe²⁺(aq) ∣ Fe(s)

How long must a constant current of 50.0 A be passed through an electrolytic cell containing aqueous Cu²⁺ ions to produce 5.00 moles of copper metal?

Based on the following information, Cl₂(g) + 2 e^- → 2 Cl^-(aq) E° = + 1.36 V Mg²⁺(aq) + 2 e^- → 2 Mg(s) E° = -2.37 V Which of the following chemical species is the strongest reducing agent?

A galvanic cell consists of a Ni²⁺/ Ni half-cell and a standard hydrogen electrode.If the Ni²⁺/ Ni half-cell standard cell functions as the anode,and the standard cell potential is 0.26 V,what is the standard reduction potential for the Ni²+/ Ni half-cell?

What is the balanced equation for the galvanic cell reaction expressed using shorthand notation below? Ni(s) ∣ Ni²⁺(aq) ∣∣ Cl₂(g) ∣ Cl^-(aq) ∣ C(s)

What is the shorthand notation that represents the following galvanic cell reaction? 2 Fe²⁺(aq) + F₂(g) → 2 Fe³⁺(aq) + 2 F^-(aq)

In the shorthand notation for a galvanic cell,a single vertical line (|)represents a ,and a double vertical line (||)represents a .

For the galvanic cell reaction,expressed below using shorthand notation,what half-reaction occurs at the cathode? Zn(s) ∣ Zn²⁺(aq) ∣∣ Ni²⁺(aq) ∣ Ni(s)

In the galvanic cell represented by the shorthand notation Al(s)|Al³⁺(aq)||Fe³⁺(aq)|Fe(s) the anode is and the cathode is .

Consider the galvanic cell,Zn(s) ∣ Zn²⁺(aq) ∣∣ Pb²⁺(aq) ∣ Pb(s) .Which one of the following changes to the cell would cause the cell potential to increase (i.e. ,become more positive) ?

In the galvanic cell represented by the shorthand notation shown below Pb(aq)| Pb²⁺(aq)| Cl₂(g)|Cl^-(aq)| Pt(s) the inert electrode is ,and the balanced cathode half-reaction reaction is .