Which of the compounds of H2C2O4, Ca(OH)2,KOH,and HI behave as acids when they are dissolved in water?

A) Ca(OH)2 and KOH B) H2C2O4 and HI C) only HI D) only KOH A) Ca(OH)2 and KOH B) H2C2O4 and HI C) only HI D) only KOH

Iron in the form FeCl2 can be determined by titration with potassium dichromate: 6 FeCl2(aq)+ K2Cr2O7(aq)+ 14 HCl(aq)→ 6 FeCl3(aq)+ 2 CrCl3(aq)+ 2 KCl(aq)+ 7 H2O(l) An iron sample of mass 0.800 g required 18.80 mL of 0.0120 M K2Cr2O7(aq)to reach the end point.How many moles of FeCl2 were in the sample?

A) 1.43 × 10-2 mol B) 1.35 × 10-3 mol C) 3.75 × 10-5 mol D) 2.26 × 10-4 mol E) 1.13 × 10-4 mol A) 1.43 × 10-2 mol B) 1.35 × 10-3 mol C) 3.75 × 10-5 mol D) 2.26 × 10-4 mol E) 1.13 × 10-4 mol

A 5.000 mL aqueous sample containing hydrogen peroxide was diluted to 25 mL and analyzed by titration with permanganate: 2 MnO4-(aq)+ 5 H2O2(aq)+ 6 H+(aq)→ 5 O2(g)+ 2 Mn2+(aq)+ 8 H2O(l) The sample required 42.8 mL of 0.0175 M permanganate to reach the end point.What is the concentration of hydrogen peroxide in the original sample?

A) 0.150 M B) 0.0748 M C) 0.375 M D) 0.0599 M A) 0.150 M B) 0.0748 M C) 0.375 M D) 0.0599 M

Exam 5: Introduction to Reactions in Aqueous Solutions

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: HCl(aq)+ H₂C₂O₄(aq)+ MnO₂(s)→ MnCl₂(aq)+ CO₂(g)+ H₂O(l) The sum of the coefficients is ________.

(Multiple Choice)

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Question 41

Which of the compounds of H₂C₂O_4, Ca(OH)₂,KOH,and HI behave as acids when they are dissolved in water?

(Multiple Choice)

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Question 42

12.5 mL of 0.280 M HNO₃(aq)and 5.0 mL of 0.920 M KOH(aq)are mixed.Is the resulting solution acidic,basic,or neutral?

(Multiple Choice)

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Question 43

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: HNO₃(aq)+ I₂(s)→ HIO₃(aq)+ NO₂(g)+ H₂O(l) The sum of the coefficients is ________.

(Multiple Choice)

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Question 44

Iron in the form FeCl₂ can be determined by titration with potassium dichromate: 6 FeCl₂(aq)+ K₂Cr₂O₇(aq)+ 14 HCl(aq)→ 6 FeCl₃(aq)+ 2 CrCl₃(aq)+ 2 KCl(aq)+ 7 H₂O(l) An iron sample of mass 0.800 g required 18.80 mL of 0.0120 M K₂Cr₂O₇(aq)to reach the end point.How many moles of FeCl₂ were in the sample?

(Multiple Choice)

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Question 45

A sample of magnesium oxide was dissolved in 50.0 mL of 0.183 M hydrochloric acid,and the excess acid was titrated to a phenolphthalein end-point by 13.4 mL of 0.105 M sodium hydroxide.What was the mass of the magnesium oxide sample?

(Multiple Choice)

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Question 46

Which pair of compounds is soluble in water?

(Multiple Choice)

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Question 47

Choose the INCORRECT statement.

(Multiple Choice)

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Question 48

Indicate whether a precipitate forms by completing equation Li⁺(aq)+ Br^-(aq)+ Pb²⁺(aq)+ NO₃^-(aq)→ ?

(Multiple Choice)

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Question 49

What is the sum of all coefficients in the complete and balanced net equation for the reaction occurring when chlorine gas is bubbled through aqueous sodium hydroxide to form aqueous sodium hypochlorite (NaOCl)and sodium chloride?

(Multiple Choice)

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Question 50

Reactive metals such as iron will reduce arsenic acid (H₃AsO₄)to the highly poisonous arsine gas (AsH₃)in the presence of acid.What mass of iron would be required for such a reaction with 250 mL of 0.90 M arsenic acid,assuming that the iron is oxidized to Fe³⁺? 3 H₃AsO₄ + 8 Fe + 24 H⁺→ 3 AsH₃ + 12 H₂O + 8 Fe³⁺

(Multiple Choice)

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Question 51

A reducing agent causes itself to be reduced.

(True/False)

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Question 52

A 5.000 mL aqueous sample containing hydrogen peroxide was diluted to 25 mL and analyzed by titration with permanganate: 2 MnO₄^-(aq)+ 5 H₂O₂(aq)+ 6 H⁺(aq)→ 5 O₂(g)+ 2 Mn²⁺(aq)+ 8 H₂O(l) The sample required 42.8 mL of 0.0175 M permanganate to reach the end point.What is the concentration of hydrogen peroxide in the original sample?

(Multiple Choice)

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Question 53

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: IO₃^-(aq)+ N₂H₄(aq)→ I^-(aq)+ N₂(g)+ H₂O(l) The sum of the coefficients is ________.

(Multiple Choice)

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Question 54

A solution is prepared by mixing 50.0 mL of 0.100 mol L^-1 HCl and 10.0 mL of 0.200 mol L^-1 NaCl.What is the molarity of chloride ion in this solution?

(Multiple Choice)

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Question 55

In which of the following pairs is the oxidation number for the underlined element INCORRECT?

(Multiple Choice)

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Question 56

Which of the following reactions is an oxidation-reduction reaction?

(Multiple Choice)

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Question 57

Based on the balanced chemical equation shown below,what volume of 0.250 mol L^-1 K₂S₂O₃(aq)is needed to completely react with 24.88 mL of 0.125 mol L^-1 KI₃(aq),according to the following chemical equation: 2 S₂O₃^2-(aq)+ I₃^-(aq)→ S₄O₆^2-(aq)+ 3 I^-(aq)

(Multiple Choice)

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Question 58

A disproportionation reaction is one in which:

(Multiple Choice)

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Question 59

What volume of 0.38 M hydrochloric acid is required for complete neutralization of 15 mL of 0.19 M calcium hydroxide?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 124

Exam 5: Introduction to Reactions in Aqueous Solutions

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: HCl(aq)+ H2C2O4(aq)+ MnO2(s)→ MnCl2(aq)+ CO2(g)+ H2O(l) The sum of the coefficients is ________.

Which of the compounds of H2C2O4, Ca(OH)2,KOH,and HI behave as acids when they are dissolved in water?

12.5 mL of 0.280 M HNO3(aq)and 5.0 mL of 0.920 M KOH(aq)are mixed.Is the resulting solution acidic,basic,or neutral?

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: HNO3(aq)+ I2(s)→ HIO3(aq)+ NO2(g)+ H2O(l) The sum of the coefficients is ________.

A sample of magnesium oxide was dissolved in 50.0 mL of 0.183 M hydrochloric acid,and the excess acid was titrated to a phenolphthalein end-point by 13.4 mL of 0.105 M sodium hydroxide.What was the mass of the magnesium oxide sample?

Which pair of compounds is soluble in water?

Choose the INCORRECT statement.

Indicate whether a precipitate forms by completing equation Li+(aq)+ Br-(aq)+ Pb2+(aq)+ NO3-(aq) → ?

What is the sum of all coefficients in the complete and balanced net equation for the reaction occurring when chlorine gas is bubbled through aqueous sodium hydroxide to form aqueous sodium hypochlorite (NaOCl)and sodium chloride?

A reducing agent causes itself to be reduced.

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: IO3-(aq)+ N2H4(aq)→ I-(aq)+ N2(g)+ H2O(l) The sum of the coefficients is ________.

A solution is prepared by mixing 50.0 mL of 0.100 mol L-1 HCl and 10.0 mL of 0.200 mol L-1 NaCl.What is the molarity of chloride ion in this solution?

In which of the following pairs is the oxidation number for the underlined element INCORRECT?

Which of the following reactions is an oxidation-reduction reaction?

Based on the balanced chemical equation shown below,what volume of 0.250 mol L-1 K2S2O3(aq)is needed to completely react with 24.88 mL of 0.125 mol L-1 KI3(aq),according to the following chemical equation: 2 S2O32-(aq)+ I3-(aq)→ S4O62-(aq)+ 3 I-(aq)

A disproportionation reaction is one in which:

What volume of 0.38 M hydrochloric acid is required for complete neutralization of 15 mL of 0.19 M calcium hydroxide?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

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Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: HCl(aq)+ H₂C₂O₄(aq)+ MnO₂(s)→ MnCl₂(aq)+ CO₂(g)+ H₂O(l) The sum of the coefficients is ________.

Which of the compounds of H₂C₂O_4, Ca(OH)₂,KOH,and HI behave as acids when they are dissolved in water?

12.5 mL of 0.280 M HNO₃(aq)and 5.0 mL of 0.920 M KOH(aq)are mixed.Is the resulting solution acidic,basic,or neutral?

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: HNO₃(aq)+ I₂(s)→ HIO₃(aq)+ NO₂(g)+ H₂O(l) The sum of the coefficients is ________.

Indicate whether a precipitate forms by completing equation Li⁺(aq)+ Br^-(aq)+ Pb²⁺(aq)+ NO₃^-(aq)→ ?

Balance the following equation for an oxidation-reduction reaction occurring in an acidic solution: IO₃^-(aq)+ N₂H₄(aq)→ I^-(aq)+ N₂(g)+ H₂O(l) The sum of the coefficients is ________.

A solution is prepared by mixing 50.0 mL of 0.100 mol L^-1 HCl and 10.0 mL of 0.200 mol L^-1 NaCl.What is the molarity of chloride ion in this solution?

Based on the balanced chemical equation shown below,what volume of 0.250 mol L^-1 K₂S₂O₃(aq)is needed to completely react with 24.88 mL of 0.125 mol L^-1 KI₃(aq),according to the following chemical equation: 2 S₂O₃^2-(aq)+ I₃^-(aq)→ S₄O₆^2-(aq)+ 3 I^-(aq)