The electrolysis of molten AlCl3 for 3.25 hr with an electrical current of 15.0 A produces ________ g of aluminum metal.

A) 147 B) 0.606 C) 4.55 × 10-3 D) 16.4 E) 49.1 A) 147 B) 0.606 C) 4.55 × 10-3 D) 16.4 E) 49.1

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H2C2O4 and H2O in the balanced reaction? MnO4⁻(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)

A) H2C2O4 = 5, H2O = 8 B) H2C2O4 = 1, H2O = 1 C) H2C2O4 = 5, H2O = 1 D) H2C2O4 = 1, H2O = 4 E) H2C2O4 = 3, H2O = 2 A) H2C2O4 = 5, H2O = 8 B) H2C2O4 = 1, H2O = 1 C) H2C2O4 = 5, H2O = 1 D) H2C2O4 = 1, H2O = 4 E) H2C2O4 = 3, H2O = 2

A) Free metal is oxidized out of its ore. B) Undesired reduction of metals from reducing agents in the environment C) Plating a film on a metal to protect it D) Undesired oxidation of metals from oxidizing agents in the environment E) Free metal is reduced out of its ore. A) Free metal is oxidized out of its ore. B) Undesired reduction of metals from reducing agents in the environment C) Plating a film on a metal to protect it D) Undesired oxidation of metals from oxidizing agents in the environment E) Free metal is reduced out of its ore.

What element is being reduced in the following redox reaction? C3H8O2(aq)+ K2Cr2O7(aq)→ C3H4O4(aq)+ Cr+3(aq)

A) C B) H C) O D) K E) Cr A) C B) H C) O D) K E) Cr

Balance the following redox reaction if it occurs in H2SO4.What are the coefficients in front of H2O and Cr2(SO4)3 in the balanced reaction? C7H16O2(aq)+ Na2Cr2O7(aq)→ C7H12O4(aq)+ Cr2(SO4)3(aq)

A) H2O = 1, Cr2(SO4)3 = 5 B) H2O = 5, Cr2(SO4)3 = 2 C) H2O = 11, Cr2(SO4)3 = 4 D) H2O = 22, Cr2(SO4)3 = 4 E) H2O = 8, Cr2(SO4)3 = 4 A) H2O = 1, Cr2(SO4)3 = 5 B) H2O = 5, Cr2(SO4)3 = 2 C) H2O = 11, Cr2(SO4)3 = 4 D) H2O = 22, Cr2(SO4)3 = 4 E) H2O = 8, Cr2(SO4)3 = 4

What element is being oxidized in the following redox reaction? MnO4⁻(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)

A) C B) O C) Mn D) H A) C B) O C) Mn D) H

Exam 19: Electrochemistry

Balance the following reaction in KOH.What are the coefficients in front of H₂O and KOH in the balanced reaction and list which side of the equation that H₂O and KOH appear? C₁₀H₂₂O₂(aq)+ KMnO₄(aq)→ C₁₀H₁₆O₄K₂(aq)+ MnO₂(aq)

(Multiple Choice)

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Question 41

The electrolysis of molten AlCl₃ for 3.25 hr with an electrical current of 15.0 A produces ________ g of aluminum metal.

(Multiple Choice)

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Question 42

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H₂C₂O₄and H₂O in the balanced reaction? MnO₄⁻(aq)+ H₂C₂O₄(aq)→ Mn²⁺(aq)+ CO₂(g)

(Multiple Choice)

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Question 43

Define corrosion.

(Multiple Choice)

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Question 44

Which of the following metals will dissolve in HCl?

(Multiple Choice)

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Question 45

What is the reducing agent in the redox reaction represented by the following cell notation? Ca(s)∣ Ca²⁺(aq) Ag⁺(aq)∣ Ag(s)

(Multiple Choice)

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Question 46

Which of the following is the strongest reducing agent?

(Multiple Choice)

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Question 47

Explain the significance of the standard hydrogen electrode (SHE)in the tabulation of standard reduction potentials of other species.

(Essay)

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Question 48

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?

(Multiple Choice)

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Question 49

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Crand Cl₂ in the balanced reaction? Cr(s)+ Cl₂(g)→ Cr³⁺(aq)+ Cl^-(aq)

(Multiple Choice)

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Question 50

What element is being reduced in the following redox reaction? C₃H₈O₂(aq)+ K₂Cr₂O₇(aq)→ C₃H₄O₄(aq)+ Cr⁺³(aq)

(Multiple Choice)

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Question 51

Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced.) Mg(s)+ Cu²⁺(aq)→ Cu(s)+ Mg²⁺(aq) Mg²⁺(aq)+ 2 e⁻ → Mg(s)E° = -2.38 V Cu²⁺(aq)+ 2 e⁻ → Cu(s)E° = +0.34 V

(Multiple Choice)

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Question 52

The town of Natrium,West Virginia,derives its name from the sodium produced in the electrolysis of molten sodium chloride (NaCl)mined from ancient salt deposits.The number of kilowatt-hours of electricity required to produce 4.60 kg of metallic sodium from the electrolysis of molten NaCl(s)is ________ when the applied emf is 4.50 V.

(Multiple Choice)

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Question 53

Balance the following redox reaction if it occurs in H₂SO₄.What are the coefficients in front of H₂O and Cr₂(SO₄)₃ in the balanced reaction? C₇H₁₆O₂(aq)+ Na₂Cr₂O₇(aq)→ C₇H₁₂O₄(aq)+ Cr₂(SO₄)₃(aq)

(Multiple Choice)

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Question 54

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn²⁺(aq,0.022 M) Ag⁺(aq,2.7 M)∣ Ag(s)

(Multiple Choice)

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Question 55

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?

(Multiple Choice)

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Question 56

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?

(Multiple Choice)

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Question 57

What element is being oxidized in the following redox reaction? MnO₄⁻(aq)+ H₂C₂O₄(aq)→ Mn²⁺(aq)+ CO₂(g)

(Multiple Choice)

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Question 58

The most useful ore of aluminum is bauxite,in which Al is present as hydrated oxides,Al₂O₃ ∙ xH₂O.The number of kilowatt-hours of electricity required to produce 4.00 kg of aluminum from electrolysis of compounds from bauxite is ________ when the applied emf is 5.00 V.

(Multiple Choice)

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Question 59

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of ClO₂and H₂O in the balanced reaction? H₂O₂(l)+ ClO₂(aq)→ ClO₂⁻(aq)+ O₂(g)

(Multiple Choice)

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Question 60

Showing 41 - 60 of 151

Exam 19: Electrochemistry

Balance the following reaction in KOH.What are the coefficients in front of H2O and KOH in the balanced reaction and list which side of the equation that H2O and KOH appear? C10H22O2(aq)+ KMnO4(aq)→ C10H16O4K2(aq)+ MnO2(aq)

The electrolysis of molten AlCl3 for 3.25 hr with an electrical current of 15.0 A produces ________ g of aluminum metal.

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H2C2O4 and H2O in the balanced reaction? MnO4⁻(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)

Define corrosion.

Which of the following metals will dissolve in HCl?

What is the reducing agent in the redox reaction represented by the following cell notation? Ca(s)∣ Ca2+(aq) Ag+(aq)∣ Ag(s)

Which of the following is the strongest reducing agent?

Explain the significance of the standard hydrogen electrode (SHE)in the tabulation of standard reduction potentials of other species.

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?

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Cr and Cl2 in the balanced reaction? Cr(s)+ Cl2(g)→ Cr3+(aq)+ Cl-(aq)

What element is being reduced in the following redox reaction? C3H8O2(aq)+ K2Cr2O7(aq)→ C3H4O4(aq)+ Cr+3(aq)

Balance the following redox reaction if it occurs in H2SO4.What are the coefficients in front of H2O and Cr2(SO4)3 in the balanced reaction? C7H16O2(aq)+ Na2Cr2O7(aq)→ C7H12O4(aq)+ Cr2(SO4)3(aq)

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn2+(aq,0.022 M) Ag+(aq,2.7 M)∣ Ag(s)

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?

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?

What element is being oxidized in the following redox reaction? MnO4⁻(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)

The most useful ore of aluminum is bauxite,in which Al is present as hydrated oxides,Al2O3 ∙ xH2O.The number of kilowatt-hours of electricity required to produce 4.00 kg of aluminum from electrolysis of compounds from bauxite is ________ when the applied emf is 5.00 V.

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of ClO2 and H2O in the balanced reaction? H2O2(l)+ ClO2(aq)→ ClO2⁻(aq)+ O2(g)

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Balance the following reaction in KOH.What are the coefficients in front of H₂O and KOH in the balanced reaction and list which side of the equation that H₂O and KOH appear? C₁₀H₂₂O₂(aq)+ KMnO₄(aq)→ C₁₀H₁₆O₄K₂(aq)+ MnO₂(aq)

The electrolysis of molten AlCl₃ for 3.25 hr with an electrical current of 15.0 A produces ________ g of aluminum metal.

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H₂C₂O₄and H₂O in the balanced reaction? MnO₄⁻(aq)+ H₂C₂O₄(aq)→ Mn²⁺(aq)+ CO₂(g)

What is the reducing agent in the redox reaction represented by the following cell notation? Ca(s)∣ Ca²⁺(aq) Ag⁺(aq)∣ 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?

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Crand Cl₂ in the balanced reaction? Cr(s)+ Cl₂(g)→ Cr³⁺(aq)+ Cl^-(aq)

What element is being reduced in the following redox reaction? C₃H₈O₂(aq)+ K₂Cr₂O₇(aq)→ C₃H₄O₄(aq)+ Cr⁺³(aq)

Balance the following redox reaction if it occurs in H₂SO₄.What are the coefficients in front of H₂O and Cr₂(SO₄)₃ in the balanced reaction? C₇H₁₆O₂(aq)+ Na₂Cr₂O₇(aq)→ C₇H₁₂O₄(aq)+ Cr₂(SO₄)₃(aq)

Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn²⁺(aq,0.022 M) Ag⁺(aq,2.7 M)∣ Ag(s)

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?

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?

What element is being oxidized in the following redox reaction? MnO₄⁻(aq)+ H₂C₂O₄(aq)→ Mn²⁺(aq)+ CO₂(g)

The most useful ore of aluminum is bauxite,in which Al is present as hydrated oxides,Al₂O₃ ∙ xH₂O.The number of kilowatt-hours of electricity required to produce 4.00 kg of aluminum from electrolysis of compounds from bauxite is ________ when the applied emf is 5.00 V.

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of ClO₂and H₂O in the balanced reaction? H₂O₂(l)+ ClO₂(aq)→ ClO₂⁻(aq)+ O₂(g)