The concentration of oxalate ion (C2O42-) in a sample can be determined by titration with a solution of permanganate ion (MnO4-) of known concentration. The net ionic equation for this reaction is 2MnO4- + 5C2O42- + 16H+ $\rarr$ 2Mn2+ + 8H2O + 10CO2 A 30.00 mL sample of an oxalate solution is found to react completely with 21.93 mL of a 0.1725 M solution of MnO4-. What is the oxalate ion concentration in the sample

A) 0.02914 M B) 0.4312 M C) 0.1821 M D) 0.3152 M E) 0.05044 M A) 0.02914 M B) 0.4312 M C) 0.1821 M D) 0.3152 M E) 0.05044 M

Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s) + 2HCl(aq) $\rarr$ ZnCl2(aq) + H2(g) When a 12.7 g chunk of zinc dissolves in 500. mL of 1.450M HCl, what is the concentration of hydrogen ions remaining in the final solution

A) 0.776 M B) 0.388 M C) 0.674 M D) 1.06 M E) 0 M A) 0.776 M B) 0.388 M C) 0.674 M D) 1.06 M E) 0 M

Identify the precipitate(s) formed when solutions of Pb(NO3)2(aq), Mg(ClO4)2(aq), and (NH4)2SO4(aq) are mixed.

A) PbSO4 B) MgSO4 C) NH4ClO4 D) NH4NO3 and NH4ClO4 E) PbSO4 and MgSO4 A) PbSO4 B) MgSO4 C) NH4ClO4 D) NH4NO3 and NH4ClO4 E) PbSO4 and MgSO4

25.0 mL of a 0.2450 M NH4Cl solution is added to 55.5 mL of 0.1655 M FeCl3. What is the concentration of chloride ion in the final solution

A) 0.607 M B) 0.418 M C) 1.35 M D) 0.190 M E) 0.276 M A) 0.607 M B) 0.418 M C) 1.35 M D) 0.190 M E) 0.276 M

Determine the correct oxidation numbers for all three elements in Ca(ClO)2 in the order that the elements are shown in the formula

A) +2, +1, -2. B) +2, -2, +1. C) +2, -3, +2 D) -2, +2, -1 E) -2, +3, -2 A) +2, +1, -2. B) +2, -2, +1. C) +2, -3, +2 D) -2, +2, -1 E) -2, +3, -2

What element is oxidized in the following chemical reaction NiO2 + Cd + 2H2O $\rarr$ Ni(OH)2 + Cd(OH)2

A) Ni B) Cd C) O D) H E) This is not a redox reaction. A) Ni B) Cd C) O D) H E) This is not a redox reaction.

How many total electrons are transferred in the following reaction B2H6(g) + 3O2(g) $\rarr$ B2O3(s) + 3H2O(l)

A) 2 B) 3 C) 4 D) 6 E) 12 A) 2 B) 3 C) 4 D) 6 E) 12

Exam 4: Reactions in Aqueous Solutions

The concentration of oxalate ion (C₂O₄^2-) in a sample can be determined by titration with a solution of permanganate ion (MnO₄^-) of known concentration. The net ionic equation for this reaction is 2MnO₄^- + 5C₂O₄^2- + 16H⁺ $\rarr$ 2Mn²⁺ + 8H₂O + 10CO₂ A 30.00 mL sample of an oxalate solution is found to react completely with 21.93 mL of a 0.1725 M solution of MnO₄^-. What is the oxalate ion concentration in the sample

(Multiple Choice)

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Question 61

The oxidation number of N in NO is +7.

(True/False)

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Question 62

Based on the solubility rules, which of the following should be soluble in water

(Multiple Choice)

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Question 63

Which of the following, if any, is the correctly balanced net ionic equation for reaction that occurs when aqueous iron(III) sulfate is added to aqueous sodium sulfide to produce solid iron(III) sulfide and aqueous sodium sulfate.

(Multiple Choice)

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Question 64

Al is being oxidized in the following reaction.4Al + 3O₂ $\rarr$ 2Al₂O₃

(True/False)

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Question 65

What volume (mL) of a 0.3428 M HCl(aq) solution is required to completely neutralize 23.55 mL of a 0.2350 M Ba(OH)₂(aq) solution

(Multiple Choice)

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Question 66

Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s) + 2HCl(aq) $\rarr$ ZnCl₂(aq) + H₂(g) When a 12.7 g chunk of zinc dissolves in 500. mL of 1.450M HCl, what is the concentration of hydrogen ions remaining in the final solution

(Multiple Choice)

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Question 67

Ca is oxidized in this process. (Thorium metal is prepared by reacting thorium oxide with calcium as shown below.) ThO₂ + 2Ca $\rarr$ Th + 2CaO

(True/False)

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Question 68

Identify the precipitate(s) formed when solutions of Pb(NO₃)₂(aq), Mg(ClO₄)₂(aq), and (NH₄)₂SO₄(aq) are mixed.

(Multiple Choice)

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Question 69

Fluorine is the element being reduced in the following reaction. 2KBr + F₂ $\rarr$ Br₂ + 2KF

(True/False)

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Question 70

A 0.9182 g sample of CaBr₂ is dissolved in enough water to give 500. mL of solution. What is the calcium ion concentration in this solution

(Multiple Choice)

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Question 71

Identify the correct net ionic equation for the reaction that occurs when solutions of Pb(NO₃)₂ and NH₄Cl are mixed.

(Multiple Choice)

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Question 72

Identify the major ionic species present in an aqueous solution of FeCl₃.

(Multiple Choice)

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Question 73

25.0 mL of a 0.2450 M NH₄Cl solution is added to 55.5 mL of 0.1655 M FeCl₃. What is the concentration of chloride ion in the final solution

(Multiple Choice)

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Question 74

Identify the major ionic species present in an aqueous solution of NH₄ClO₄.

(Multiple Choice)

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Question 75

Which of the following compounds is a weak acid

(Multiple Choice)

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Question 76

Determine the correct oxidation numbers for all three elements in Ca(ClO)₂ in the order that the elements are shown in the formula

(Multiple Choice)

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Question 77

What element is oxidized in the following chemical reaction NiO₂ + Cd + 2H₂O $\rarr$ Ni(OH)₂ + Cd(OH)₂

(Multiple Choice)

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Question 78

How many total electrons are transferred in the following reaction B₂H₆(g) + 3O₂(g) $\rarr$ B₂O₃(s) + 3H₂O(l)

(Multiple Choice)

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Question 79

Which of the following is NOT a redox reaction

(Multiple Choice)

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Question 80

Showing 61 - 80 of 192

Exam 4: Reactions in Aqueous Solutions

The oxidation number of N in NO is +7.

Based on the solubility rules, which of the following should be soluble in water

Which of the following, if any, is the correctly balanced net ionic equation for reaction that occurs when aqueous iron(III) sulfate is added to aqueous sodium sulfide to produce solid iron(III) sulfide and aqueous sodium sulfate.

Al is being oxidized in the following reaction.4Al + 3O2 →\rarr→ 2Al2O3

What volume (mL) of a 0.3428 M HCl(aq) solution is required to completely neutralize 23.55 mL of a 0.2350 M Ba(OH)2(aq) solution

Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s) + 2HCl(aq) →\rarr→ ZnCl2(aq) + H2(g) When a 12.7 g chunk of zinc dissolves in 500. mL of 1.450M HCl, what is the concentration of hydrogen ions remaining in the final solution

Ca is oxidized in this process. (Thorium metal is prepared by reacting thorium oxide with calcium as shown below.) ThO2 + 2Ca →\rarr→ Th + 2CaO

Identify the precipitate(s) formed when solutions of Pb(NO3)2(aq), Mg(ClO4)2(aq), and (NH4)2SO4(aq) are mixed.

Fluorine is the element being reduced in the following reaction. 2KBr + F2 →\rarr→ Br2 + 2KF

A 0.9182 g sample of CaBr2 is dissolved in enough water to give 500. mL of solution. What is the calcium ion concentration in this solution

Identify the correct net ionic equation for the reaction that occurs when solutions of Pb(NO3)2 and NH4Cl are mixed.

Identify the major ionic species present in an aqueous solution of FeCl3.

25.0 mL of a 0.2450 M NH4Cl solution is added to 55.5 mL of 0.1655 M FeCl3. What is the concentration of chloride ion in the final solution

Identify the major ionic species present in an aqueous solution of NH4ClO4.

Which of the following compounds is a weak acid

Determine the correct oxidation numbers for all three elements in Ca(ClO)2 in the order that the elements are shown in the formula

What element is oxidized in the following chemical reaction NiO2 + Cd + 2H2O →\rarr→ Ni(OH)2 + Cd(OH)2

How many total electrons are transferred in the following reaction B2H6(g) + 3O2(g) →\rarr→ B2O3(s) + 3H2O(l)

Which of the following is NOT a redox reaction

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Al is being oxidized in the following reaction.4Al + 3O₂ $\rarr$ 2Al₂O₃

What volume (mL) of a 0.3428 M HCl(aq) solution is required to completely neutralize 23.55 mL of a 0.2350 M Ba(OH)₂(aq) solution

Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s) + 2HCl(aq) $\rarr$ ZnCl₂(aq) + H₂(g) When a 12.7 g chunk of zinc dissolves in 500. mL of 1.450M HCl, what is the concentration of hydrogen ions remaining in the final solution

Ca is oxidized in this process. (Thorium metal is prepared by reacting thorium oxide with calcium as shown below.) ThO₂ + 2Ca $\rarr$ Th + 2CaO

Identify the precipitate(s) formed when solutions of Pb(NO₃)₂(aq), Mg(ClO₄)₂(aq), and (NH₄)₂SO₄(aq) are mixed.

Fluorine is the element being reduced in the following reaction. 2KBr + F₂ $\rarr$ Br₂ + 2KF

A 0.9182 g sample of CaBr₂ is dissolved in enough water to give 500. mL of solution. What is the calcium ion concentration in this solution

Identify the correct net ionic equation for the reaction that occurs when solutions of Pb(NO₃)₂ and NH₄Cl are mixed.

Identify the major ionic species present in an aqueous solution of FeCl₃.

25.0 mL of a 0.2450 M NH₄Cl solution is added to 55.5 mL of 0.1655 M FeCl₃. What is the concentration of chloride ion in the final solution

Identify the major ionic species present in an aqueous solution of NH₄ClO₄.

Determine the correct oxidation numbers for all three elements in Ca(ClO)₂ in the order that the elements are shown in the formula

What element is oxidized in the following chemical reaction NiO₂ + Cd + 2H₂O $\rarr$ Ni(OH)₂ + Cd(OH)₂

How many total electrons are transferred in the following reaction B₂H₆(g) + 3O₂(g) $\rarr$ B₂O₃(s) + 3H₂O(l)