Aqueous potassium iodate (KIO3) and potassium iodide (KI) react in the presence of dilute hydrochloric acid, as shown below. KIO3(aq) + 5KI(aq) + 6HCl(aq) → 3I2(aq) + 6KCl(aq) + 3H2O(l) What mass of iodine (I2) is formed when 50.0 mL of 0.020 M KIO3 solution reacts with an excess of KI and HCl?

A) 0.13 g I 2 B) 0.25 g I 2 C) 0.38 g I 2 D) 0.76 g I 2 E) None of these choices are correct. A) 0.13 g I 2 B) 0.25 g I 2 C) 0.38 g I 2 D) 0.76 g I 2 E) None of these choices are correct.

Select the classification for the following reaction. CaCl2·H2O(s) CaCl2(s) + H2O(g)

A) Combination B) Decomposition C) Displacement D) Acid-base E) Precipitation A) Combination B) Decomposition C) Displacement D) Acid-base E) Precipitation

Predict the product(s) for the following reaction. Cl2O7(g) + H2O(l) →

A) HClO 4( aq) B) H 2ClO 4( aq) C) H(ClO 4)2( aq) D) HCl( aq)+ O 2( g) E) HClO 3( aq) A) HClO 4( aq) B) H 2ClO 4( aq) C) H(ClO 4)2( aq) D) HCl( aq)+ O 2( g) E) HClO 3( aq)

Predict the product(s) for the following reaction. H2SO4(aq) + KOH(aq) →

A) K 2SO 4( aq)+ H 2O( l) B) K 2S( aq)+ H 2O( l) C) K( s)+ H 2( g)+ SO 3( g) D) KSO 4( aq)+ H 2O( l) E) No reaction occurs. A) K 2SO 4( aq)+ H 2O( l) B) K 2S( aq)+ H 2O( l) C) K( s)+ H 2( g)+ SO 3( g) D) KSO 4( aq)+ H 2O( l) E) No reaction occurs.

Exam 4: Three Major Classes of Chemical Reactions

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Aqueous potassium iodate (KIO₃) and potassium iodide (KI) react in the presence of dilute hydrochloric acid, as shown below. KIO₃(aq) + 5KI(aq) + 6HCl(aq) → 3I₂(aq) + 6KCl(aq) + 3H₂O(l) What mass of iodine (I₂) is formed when 50.0 mL of 0.020 M KIO₃ solution reacts with an excess of KI and HCl?

(Multiple Choice)

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Question 41

When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities.

(True/False)

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Question 42

In a redox reaction, the reducing agent undergoes loss of electrons.

(True/False)

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Question 43

Copper(II) sulfide, CuS, is used in the development of aniline black dye in textile printing. What is the maximum mass of CuS which can be formed when 38.0 mL of 0.500 M CuCl₂ are mixed with 42.0 mL of 0.600 M (NH₄)₂S? Aqueous ammonium chloride is the other product.

(Multiple Choice)

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Question 44

What volume of a 0.100 M solution of HCl is required to neutralize a solution prepared by dissolving 10.0 g of KOH in 250 ml of H2O?

(Multiple Choice)

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Question 45

Select the precipitate that forms when the following reactants are mixed. Mg(CH₃COO)₂(aq) + LiOH(aq) →

(Multiple Choice)

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Question 46

What volume, in L, of 10.0 M HCl is needed to make 2.00 L of 2.00 M HCl solution by dilution with water?

(Multiple Choice)

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Question 47

Magnesium carbonate, MgCO₃, is insoluble. Identify the spectator ions when aqueous solutions of sodium carbonate and magnesium chloride are combined.

(Multiple Choice)

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Question 48

Select the classification for the following reaction. CaCl₂·H₂O(s) CaCl₂(s) + H₂O(g)

(Multiple Choice)

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Question 49

Which of the following is a strong base?

(Multiple Choice)

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Question 50

A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

(Multiple Choice)

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Question 51

Predict the product(s) for the following reaction. Cl₂O₇(g) + H₂O(l) →

(Multiple Choice)

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Question 52

Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

(Multiple Choice)

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Question 53

In an acid-base (neutralization) reaction the indicator will change color at the end point.

(True/False)

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Question 54

Which one of the following is not a redox reaction?

(Multiple Choice)

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Question 55

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl₂(aq) + Na₂CO₃(aq) →

(Multiple Choice)

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Question 56

Select the precipitate that forms when the following reactants are mixed. Na₂CO₃(aq) + BaCl₂(aq) →

(Multiple Choice)

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Question 57

What, if any, are the spectator ions when aqueous solutions of HBr and RbOH neutralize each other?

(Multiple Choice)

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Question 58

Predict the product(s) for the following reaction. H₂SO₄(aq) + KOH(aq) →

(Multiple Choice)

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Question 59

How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl₂, is dissolved in water?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 111

Exam 4: Three Major Classes of Chemical Reactions

Aqueous potassium iodate (KIO3) and potassium iodide (KI) react in the presence of dilute hydrochloric acid, as shown below. KIO3(aq) + 5KI(aq) + 6HCl(aq) → 3I2(aq) + 6KCl(aq) + 3H2O(l) What mass of iodine (I2) is formed when 50.0 mL of 0.020 M KIO3 solution reacts with an excess of KI and HCl?

When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities.

In a redox reaction, the reducing agent undergoes loss of electrons.

Copper(II) sulfide, CuS, is used in the development of aniline black dye in textile printing. What is the maximum mass of CuS which can be formed when 38.0 mL of 0.500 M CuCl2 are mixed with 42.0 mL of 0.600 M (NH4)2S? Aqueous ammonium chloride is the other product.

What volume of a 0.100 M solution of HCl is required to neutralize a solution prepared by dissolving 10.0 g of KOH in 250 ml of H2O?

Select the precipitate that forms when the following reactants are mixed. Mg(CH3COO)2(aq) + LiOH(aq) →

What volume, in L, of 10.0 M HCl is needed to make 2.00 L of 2.00 M HCl solution by dilution with water?

Magnesium carbonate, MgCO3, is insoluble. Identify the spectator ions when aqueous solutions of sodium carbonate and magnesium chloride are combined.

Select the classification for the following reaction. CaCl2·H2O(s) CaCl2(s) + H2O(g)

Which of the following is a strong base?

A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

Predict the product(s) for the following reaction. Cl2O7(g) + H2O(l) →

Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

In an acid-base (neutralization) reaction the indicator will change color at the end point.

Which one of the following is not a redox reaction?

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl2(aq) + Na2CO3(aq) →

Select the precipitate that forms when the following reactants are mixed. Na2CO3(aq) + BaCl2(aq) →

What, if any, are the spectator ions when aqueous solutions of HBr and RbOH neutralize each other?

Predict the product(s) for the following reaction. H2SO4(aq) + KOH(aq) →

How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl2, is dissolved in water?

Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

The Components of Matter

Stoichiometry of Formulas and Equations

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and Reaction Direction

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

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Copper(II) sulfide, CuS, is used in the development of aniline black dye in textile printing. What is the maximum mass of CuS which can be formed when 38.0 mL of 0.500 M CuCl₂ are mixed with 42.0 mL of 0.600 M (NH₄)₂S? Aqueous ammonium chloride is the other product.

Select the precipitate that forms when the following reactants are mixed. Mg(CH₃COO)₂(aq) + LiOH(aq) →

Magnesium carbonate, MgCO₃, is insoluble. Identify the spectator ions when aqueous solutions of sodium carbonate and magnesium chloride are combined.

Select the classification for the following reaction. CaCl₂·H₂O(s) CaCl₂(s) + H₂O(g)

Predict the product(s) for the following reaction. Cl₂O₇(g) + H₂O(l) →

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl₂(aq) + Na₂CO₃(aq) →

Select the precipitate that forms when the following reactants are mixed. Na₂CO₃(aq) + BaCl₂(aq) →

Predict the product(s) for the following reaction. H₂SO₄(aq) + KOH(aq) →

How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl₂, is dissolved in water?