Based on the balanced chemical equation shown below,determine the mass percent of Fe3+ in a 0.6450 gram sample of iron ore,if 22.40 mL of a 0.1000 M stannous chloride,SnCl2(aq),solution is required to completely react with the Fe3+ present in the ore sample.The chemical equation for the reaction is: 2 Fe3+(aq)+ Sn2+(aq)→ 2 Fe2+(aq)+ Sn4+(aq).

A) 6)196% B) 9)697% C) 19.40% D) 38.79% A) 6)196% B) 9)697% C) 19.40% D) 38.79%

Write a balanced net ionic equation for the reaction of NiBr2(aq)with (NH4)2S(aq).

A) NiBr2(aq)+ (NH4)2S(aq)→ NiS(s)+ 2 NH4Br(aq) B) Ni2+(aq)+ 2 Br-(aq)+ 2 NH4+(aq)+ S2-(aq)→ NiS(s)+ 2 NH4+(aq)+ 2 Br-(aq) C) Ni2+(aq)+ 2 Br-(aq)+ 2 NH4+(aq)+ S2-(aq)→ NiS(s)+ 2 NH4Br(s) D) Ni2+(aq)+ S2-(aq)→ NiS(s) A) NiBr2(aq)+ (NH4)2S(aq)→ NiS(s)+ 2 NH4Br(aq) B) Ni2+(aq)+ 2 Br-(aq)+ 2 NH4+(aq)+ S2-(aq)→ NiS(s)+ 2 NH4+(aq)+ 2 Br-(aq) C) Ni2+(aq)+ 2 Br-(aq)+ 2 NH4+(aq)+ S2-(aq)→ NiS(s)+ 2 NH4Br(s) D) Ni2+(aq)+ S2-(aq)→ NiS(s)

Based on the balanced chemical equation shown below,what volume of 0.250 M K2S2O3(aq),is needed to completely react with 24.88 mL of 0.125 M KI3(aq)? 2 S2O32-(aq)+ I3-(aq)→ S4O62-(aq)+ 3 I-(aq)

A) 6)22 mL B) 12.4 mL C) 24.9 mL D) 99.5 mL A) 6)22 mL B) 12.4 mL C) 24.9 mL D) 99.5 mL

The reaction HNO3(aq)+ KOH(aq)→ KNO3(aq)+ H2O(l)is best classified as a(n)

A) acid-base neutralization reaction. B) oxidation-reduction reaction. C) precipitation reaction. D) single replacement reaction. A) acid-base neutralization reaction. B) oxidation-reduction reaction. C) precipitation reaction. D) single replacement reaction.

According to the balanced equation shown below,4.00 mole of oxalic acid,H2C2O4,reacts with ________ moles of permanganate,MnO4-. 5 H2C2O4(aq)+ 2 MnO4-(aq)+ 6 H+(aq)→ 10 CO2(g)+ Mn2+(aq)+ 8 H2O(l)

A) 1)60 B) 4)00 C) 8)00 D) 9)00 A) 1)60 B) 4)00 C) 8)00 D) 9)00

The reaction Pb(NO3)2(aq)+ K2SO4(aq)→ PbSO4(s)+ 2 KNO3(aq)is best classified as a(n)

A) acid-base neutralization reaction. B) oxidation-reduction reaction. C) precipitation reaction. D) single replacement reaction. A) acid-base neutralization reaction. B) oxidation-reduction reaction. C) precipitation reaction. D) single replacement reaction.

What reagent could be used to separate Br- from CH3CO2- when added to an aqueous solution containing both?

A) AgNO3 (aq) B) Ba(OH)2 (aq) C) CuSO4 (aq) D) NaI (aq) A) AgNO3 (aq) B) Ba(OH)2 (aq) C) CuSO4 (aq) D) NaI (aq)

What is the oxidation number of the chromium atom in K2Cr2O7?

A) -2 B) +2 C) +6 D) +7 A) -2 B) +2 C) +6 D) +7

What is the molar concentration of sodium ions in a 0.450 M Na3PO4 solution?

A) 0)150 M B) 0)450 M C) 1)35 M D) 1)80 M A) 0)150 M B) 0)450 M C) 1)35 M D) 1)80 M

Exam 4: Reactions in Aqueous Solutions

Based on the balanced chemical equation shown below,determine the mass percent of Fe³⁺ in a 0.6450 gram sample of iron ore,if 22.40 mL of a 0.1000 M stannous chloride,SnCl₂(aq),solution is required to completely react with the Fe³⁺ present in the ore sample.The chemical equation for the reaction is: 2 Fe³⁺(aq)+ Sn²⁺(aq)→ 2 Fe²⁺(aq)+ Sn⁴⁺(aq).

(Multiple Choice)

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Question 121

The oxidation number of chromium in Na₂Cr₂O₇ is ________.

(Short Answer)

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Question 122

The balanced net ionic equation for the reaction H₂SO₄(aq)+ 2 KOH(aq)→ K₂SO₄(aq)+ 2 H₂O(l)is ________.

(Short Answer)

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Question 123

Write a balanced net ionic equation for the reaction of NiBr₂(aq)with (NH₄)₂S(aq).

(Multiple Choice)

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Question 124

In which compound is the oxidation state of oxygen not -2?

(Multiple Choice)

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Question 125

Which species functions as the oxidizing agent in the following reduction-oxidation reaction? Zn(s)+ Cu²⁺(aq)→ Cu(s)+ Zn²⁺(aq)

(Multiple Choice)

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Question 126

Based on the balanced chemical equation shown below,what volume of 0.250 M K₂S₂O₃(aq),is needed to completely react with 24.88 mL of 0.125 M KI₃(aq)? 2 S₂O₃^2-(aq)+ I₃^-(aq)→ S₄O₆^2-(aq)+ 3 I^-(aq)

(Multiple Choice)

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Question 127

The following pictures represent aqueous solutions of three acids HA (A = X,Y,or Z),with water molecules omitted for clarity.Unshaded spheres represent hydrogen atoms or ions and gray spheres represent A atoms or ions.Which of the three is the strongest acid,and which is the weakest?

(Multiple Choice)

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Question 128

The reaction HNO₃(aq)+ KOH(aq)→ KNO₃(aq)+ H₂O(l)is best classified as a(n)

(Multiple Choice)

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Question 129

According to the balanced equation shown below,4.00 mole of oxalic acid,H₂C₂O₄,reacts with ________ moles of permanganate,MnO₄^-. 5 H₂C₂O₄(aq)+ 2 MnO₄^-(aq)+ 6 H⁺(aq)→ 10 CO₂(g)+ Mn²⁺(aq)+ 8 H₂O(l)

(Multiple Choice)

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Question 130

The reaction shown below is classified as a(n)________ reaction. Pb(OH)₂(s)+ 2 HNO₃(aq)→ Pb(NO₃)₂(aq)+ 2 H₂O(l)

(Short Answer)

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Question 131

Assume that an aqueous solution of a cation,represented by shaded spheres,is allowed to mix with a solution of an anion,represented by unshaded spheres.Three possible outcomes are represented by boxes (a)-(c). -Which outcome corresponds to the mixing of potassium and sulfide ions shown in the following equation? 2 K⁺(aq)+ S^2-(aq)→ ?

(Multiple Choice)

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Question 132

Three different substances,A₂X,A₂Y,and A₂Z,were dissolved in water with the following results.(Water molecules are omitted for clarity. )Which of the substances is the strongest electrolyte,and which is the weakest?

(Multiple Choice)

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Question 133

The reaction Pb(NO₃)₂(aq)+ K₂SO₄(aq)→ PbSO₄(s)+ 2 KNO₃(aq)is best classified as a(n)

(Multiple Choice)

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Question 134

What reagent could be used to separate Br^- from CH₃CO₂^-when added to an aqueous solution containing both?

(Multiple Choice)

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Question 135

What is the oxidation number of the chromium atom in K₂Cr₂O₇?

(Multiple Choice)

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Question 136

What is the molar concentration of sodium ions in a 0.450 M Na₃PO₄ solution?

(Multiple Choice)

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Question 137

Which one of the following compounds is insoluble in water?

(Multiple Choice)

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Question 138

Based on the activity series,which metal dissolves in hydrochloric acid to produce hydrogen gas?

(Multiple Choice)

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Question 139

Which elements will not react with liquid water or with aqueous H⁺ ions?

(Multiple Choice)

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Question 140

Showing 121 - 140 of 174

Exam 4: Reactions in Aqueous Solutions

The oxidation number of chromium in Na2Cr2O7 is ________.

The balanced net ionic equation for the reaction H2SO4(aq)+ 2 KOH(aq)→ K2SO4(aq)+ 2 H2O(l)is ________.

Write a balanced net ionic equation for the reaction of NiBr2(aq)with (NH4)2S(aq).

In which compound is the oxidation state of oxygen not -2?

Which species functions as the oxidizing agent in the following reduction-oxidation reaction? Zn(s)+ Cu2+(aq)→ Cu(s)+ Zn2+(aq)

Based on the balanced chemical equation shown below,what volume of 0.250 M K2S2O3(aq),is needed to completely react with 24.88 mL of 0.125 M KI3(aq)? 2 S2O32-(aq)+ I3-(aq)→ S4O62-(aq)+ 3 I-(aq)

The following pictures represent aqueous solutions of three acids HA (A = X,Y,or Z),with water molecules omitted for clarity.Unshaded spheres represent hydrogen atoms or ions and gray spheres represent A atoms or ions.Which of the three is the strongest acid,and which is the weakest?

The reaction HNO3(aq)+ KOH(aq)→ KNO3(aq)+ H2O(l)is best classified as a(n)

According to the balanced equation shown below,4.00 mole of oxalic acid,H2C2O4,reacts with ________ moles of permanganate,MnO4-. 5 H2C2O4(aq)+ 2 MnO4-(aq)+ 6 H+(aq)→ 10 CO2(g)+ Mn2+(aq)+ 8 H2O(l)

The reaction shown below is classified as a(n)________ reaction. Pb(OH)2(s)+ 2 HNO3(aq)→ Pb(NO3)2(aq)+ 2 H2O(l)

Three different substances,A2X,A2Y,and A2Z,were dissolved in water with the following results.(Water molecules are omitted for clarity. )Which of the substances is the strongest electrolyte,and which is the weakest?

The reaction Pb(NO3)2(aq)+ K2SO4(aq)→ PbSO4(s)+ 2 KNO3(aq)is best classified as a(n)

What reagent could be used to separate Br- from CH3CO2- when added to an aqueous solution containing both?

What is the oxidation number of the chromium atom in K2Cr2O7?

What is the molar concentration of sodium ions in a 0.450 M Na3PO4 solution?

Which one of the following compounds is insoluble in water?

Based on the activity series,which metal dissolves in hydrochloric acid to produce hydrogen gas?

Which elements will not react with liquid water or with aqueous H+ ions?

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The oxidation number of chromium in Na₂Cr₂O₇ is ________.

The balanced net ionic equation for the reaction H₂SO₄(aq)+ 2 KOH(aq)→ K₂SO₄(aq)+ 2 H₂O(l)is ________.

Write a balanced net ionic equation for the reaction of NiBr₂(aq)with (NH₄)₂S(aq).

Which species functions as the oxidizing agent in the following reduction-oxidation reaction? Zn(s)+ Cu²⁺(aq)→ Cu(s)+ Zn²⁺(aq)

Based on the balanced chemical equation shown below,what volume of 0.250 M K₂S₂O₃(aq),is needed to completely react with 24.88 mL of 0.125 M KI₃(aq)? 2 S₂O₃^2-(aq)+ I₃^-(aq)→ S₄O₆^2-(aq)+ 3 I^-(aq)

The reaction HNO₃(aq)+ KOH(aq)→ KNO₃(aq)+ H₂O(l)is best classified as a(n)

According to the balanced equation shown below,4.00 mole of oxalic acid,H₂C₂O₄,reacts with ________ moles of permanganate,MnO₄^-. 5 H₂C₂O₄(aq)+ 2 MnO₄^-(aq)+ 6 H⁺(aq)→ 10 CO₂(g)+ Mn²⁺(aq)+ 8 H₂O(l)

The reaction shown below is classified as a(n)________ reaction. Pb(OH)₂(s)+ 2 HNO₃(aq)→ Pb(NO₃)₂(aq)+ 2 H₂O(l)

Three different substances,A₂X,A₂Y,and A₂Z,were dissolved in water with the following results.(Water molecules are omitted for clarity. )Which of the substances is the strongest electrolyte,and which is the weakest?

The reaction Pb(NO₃)₂(aq)+ K₂SO₄(aq)→ PbSO₄(s)+ 2 KNO₃(aq)is best classified as a(n)

What reagent could be used to separate Br^- from CH₃CO₂^-when added to an aqueous solution containing both?

What is the oxidation number of the chromium atom in K₂Cr₂O₇?

What is the molar concentration of sodium ions in a 0.450 M Na₃PO₄ solution?

Which elements will not react with liquid water or with aqueous H⁺ ions?