Question 1

20.5 milliliters of 0.506 M NaOH is required to titrate 25.0 milliliters of sulfuric acid of unknown concentration.Find the molarity of the acid.

Accepted Answer

A) 0.207 M 
B) 0.309 M 
C) 0.415 M 
D) 0.830 M 
E) 4.82 M 
A) 0.207 M 
B) 0.309 M 
C) 0.415 M 
D) 0.830 M 
E) 4.82 M A

Question 2

What volume of 0.142 N hydrochloric acid will react with 10.00 mL of 0.117 N barium hydroxide?

Accepted Answer

A) 12.14 mL 
B) 6.07 mL 
C) 8.24 mL 
D) 16.48 mL 
E) 10.00 mL 
A) 12.14 mL 
B) 6.07 mL 
C) 8.24 mL 
D) 16.48 mL 
E) 10.00 mL C

Question 3

Consider the following beaker which has had its contents (KBr and water)mixed until no further change occurs.   Which of the following best describes the contents of the beaker?

Accepted Answer

A) KBr - solute and water - solvent. 
B) Saturated solution 
C) Addition of enough water would produce an unsaturated solution 
D) A heterogeneous mixture. 
E) All of the above correctly describe the contents of the beaker.. 
A) KBr - solute and water - solvent. 
B) Saturated solution 
C) Addition of enough water would produce an unsaturated solution 
D) A heterogeneous mixture. 
E) All of the above correctly describe the contents of the beaker.. E

Question 4

What volume of 0.372 M H2SO4 contains 0.100 moles of solute?

Accepted Answer

A) 269 mL 
B) 380 mL 
C) 372 mL 
D) 36.0 mL 
E) 100 mL 
A) 269 mL 
B) 380 mL 
C) 372 mL 
D) 36.0 mL 
E) 100 mL

Question 5

The citric acid in a lemon juice sample was neutralized by titration with NaOH solution.If 5.00 mL of lemon juice required 47.8 mL of 0.121 M NaOH for neutralization,what was the molarity of the citric acid in the lemon juice? The reaction is 3 NaOH + H3C6H5O7 → 3 H2O + Na3C6H5O7.

Accepted Answer

A) 1.16 M 
B) 3.47 M 
C) 0.110 M 
D) 0.386 M 
E) 0.329 M 
A) 1.16 M 
B) 3.47 M 
C) 0.110 M 
D) 0.386 M 
E) 0.329 M

Question 6

Calculate the number of grams of ethyl alcohol (ethanol),C2H5OH,in 4.40 × 102 grams of a 23.0% solution.

Accepted Answer

A) 5.23 g 
B) 19.1 g 
C) 23.0 g 
D) 339 g 
E) 101 g 
A) 5.23 g 
B) 19.1 g 
C) 23.0 g 
D) 339 g 
E) 101 g

Question 7

Identify the incorrect statement about events that occur between the time excess solid solute is first introduced to a liquid solvent and the time when the solution becomes saturated.Assume that the surface area of the solute remains constant throughout the process.

Accepted Answer

A) The rate of concentration change is zero when the solution is saturated 
B) The net rate of concentration change is greatest at the beginning of the process 
C) The rate of dissolving is greater than the rate of crystallization when the solution is one-half saturated 
D) If temperature remains constant, the rate of dissolving is constant 
E) If temperature remains constant, the rate of crystallization remains constant 
A) The rate of concentration change is zero when the solution is saturated 
B) The net rate of concentration change is greatest at the beginning of the process 
C) The rate of dissolving is greater than the rate of crystallization when the solution is one-half saturated 
D) If temperature remains constant, the rate of dissolving is constant 
E) If temperature remains constant, the rate of crystallization remains constant

Question 8

When 2.77 g of a solute was dissolved in 25.0 g of water,the resulting solution had a freezing point of -3.06°C.What is the apparent molar mass of the solute? Kf of water is 1.86°C/m.

Accepted Answer

A) 36.2 g/mol 
B) 67.3 g/mol 
C) 227 g/mol 
D) 82.2 g/mol 
E) 1.65 g/mol 
A) 36.2 g/mol 
B) 67.3 g/mol 
C) 227 g/mol 
D) 82.2 g/mol 
E) 1.65 g/mol

Question 9

Calculate the increase in boiling point of a solution made by dissolving 40.0 g of glucose,C6H12O6,in 250.0 g of water.Kb for water is 0.52°C/m.

Accepted Answer

A) 0.12°C 
B) 0.46°C 
C) 0.59°C 
D) 1.7°C 
E) 83.2°C 
A) 0.12°C 
B) 0.46°C 
C) 0.59°C 
D) 1.7°C 
E) 83.2°C

Question 10

The structures of cyclohexane and benzene are shown below.  
 It is logical to expect that these liquids are:

Accepted Answer

A) miscible because of their similar structures and sizes 
B) miscible because they contain the same number of carbon atoms 
C) immiscible because benzene, with half as many hydrogen atoms, has less hydrogen bonding than cyclohexane 
D) immiscible because one molecule is polar and the other nonpolar 
E) immiscible because both molecules have ring structures 
A) miscible because of their similar structures and sizes 
B) miscible because they contain the same number of carbon atoms 
C) immiscible because benzene, with half as many hydrogen atoms, has less hydrogen bonding than cyclohexane 
D) immiscible because one molecule is polar and the other nonpolar 
E) immiscible because both molecules have ring structures

Question 11

The cylinder shown contains 0.79 moles of nitrogen,0.19 moles of oxygen and 0.02 moles carbon dioxide,a total of 1.00 mole of molecules in the approximate proportion in which they are present in air.Of the three gases,only carbon dioxide is appreciably soluble in the water in the well at the bottom.Assume an equilibrium between dissolved and undissolved carbon dioxide at the beginning and sufficient time lapse to reestablish that equilibrium after the change described.   If 0.02 mole of carbon dioxide is forced into the cylinder,the solubility of carbon dioxide:

Accepted Answer

A) increases by a factor of about 50 
B) increases by a factor of about 2 
C) increases by 2% 
D) remains unchanged 
E) decreases 
A) increases by a factor of about 50 
B) increases by a factor of about 2 
C) increases by 2% 
D) remains unchanged 
E) decreases

Question 12

Which of the following statements is incorrect?

Accepted Answer

A) The roles of solute and solvent are not always clearly defined in the solution of one liquid in another 
B) When water and carbon tetrachloride are in the same test tube, a denser layer of carbon tetrachloride forms beneath a less dense layer of water. The liquids are said to be miscible 
C) A solution of a given concentration that is saturated at one temperature may be unsaturated at another temperature 
D) Dilute nitric acid and dilute sulfuric acid may or may not have the same concentration 
E) The concentration of solute in a supersaturated solution is greater than the normal solubility limit 
A) The roles of solute and solvent are not always clearly defined in the solution of one liquid in another 
B) When water and carbon tetrachloride are in the same test tube, a denser layer of carbon tetrachloride forms beneath a less dense layer of water. The liquids are said to be miscible 
C) A solution of a given concentration that is saturated at one temperature may be unsaturated at another temperature 
D) Dilute nitric acid and dilute sulfuric acid may or may not have the same concentration 
E) The concentration of solute in a supersaturated solution is greater than the normal solubility limit

Question 13

Which of the following statements is incorrect?

Accepted Answer

A) If sugar is dissolved in water, sugar is the solute and water is the solvent 
B) In an experiment, students are instructed to add water to a certain quantity of a stock solution of sodium hydroxide. The resulting solution may be called dilute, and the stock solution is said to be concentrated 
C) If, at a given temperature, the solubility of a certain compound is 56 grams per 100 milliliters of water, a solution having a concentration of 46 grams per 100 milliliters at the same temperature is supersaturated 
D) Oil and water are immiscible 
E) The concentration of a saturated solution, expressed in grams per 100 milliliters of solvent, is the same as its solubility expressed in the same units 
A) If sugar is dissolved in water, sugar is the solute and water is the solvent 
B) In an experiment, students are instructed to add water to a certain quantity of a stock solution of sodium hydroxide. The resulting solution may be called dilute, and the stock solution is said to be concentrated 
C) If, at a given temperature, the solubility of a certain compound is 56 grams per 100 milliliters of water, a solution having a concentration of 46 grams per 100 milliliters at the same temperature is supersaturated 
D) Oil and water are immiscible 
E) The concentration of a saturated solution, expressed in grams per 100 milliliters of solvent, is the same as its solubility expressed in the same units

Question 14

Cu(OH)2 can be obtained from the addition of excess NaOH solution to a solution of Cu(NO3)2 as shown in the figure.   If the NaOH is added to 35.0 mL of 0.167 M Cu(NO3)2 and the precipitate isolated by filtration,what is the theoretical yield of the reaction?

Accepted Answer

A) 0.471 g 
B) 585 g 
C) 1.10 g 
D) 0.570 g 
E) 1.14 g 
A) 0.471 g 
B) 585 g 
C) 1.10 g 
D) 0.570 g 
E) 1.14 g

Question 15

What is the equivalent mass of sulfuric acid in the reaction H2SO4 + 2 NaOH → 2 H2O + Na2SO4?

Accepted Answer

A) 98.0 g/eq 
B) 1.00 g/eq 
C) 2.00 g/eq 
D) 49.0 g/eq 
E) 9.80 g/eq 
A) 98.0 g/eq 
B) 1.00 g/eq 
C) 2.00 g/eq 
D) 49.0 g/eq 
E) 9.80 g/eq

Question 16

Consider the graph shown below.   Which substance's solubility behaves the most like the solubility of a gas as the temperature is increased?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E

Question 17

How many grams of Ba(OH)2 are needed to prepare 2.50 liters of 0.200 M barium hydroxide solution?

Accepted Answer

A) 85.7 g 
B) 77.2 g 
C) 34.3 g 
D) 13.7 g 
E) 171.3 g 
A) 85.7 g 
B) 77.2 g 
C) 34.3 g 
D) 13.7 g 
E) 171.3 g

Question 18

What mass of cobalt(II)phosphate will precipitate when excess sodium phosphate solution is added to 100.0 mL 0.500 M cobalt(II)nitrate?

Accepted Answer

A) 6.11 g 
B) 9.2 g 
C) 18.3 g 
D) 36.7 g 
E) 55.0 g 
A) 6.11 g 
B) 9.2 g 
C) 18.3 g 
D) 36.7 g 
E) 55.0 g

Question 19

Which of the following correctly applies to the term "solution"?

Accepted Answer

A) heterogeneous mixture 
B) variable composition 
C) constant properties 
D) dissolved particles can are usually larger than about 10-7 cm 
E) exist only in the liquid and gas state 
A) heterogeneous mixture 
B) variable composition 
C) constant properties 
D) dissolved particles can are usually larger than about 10-7 cm 
E) exist only in the liquid and gas state

Question 20

75.0 mL of water is added to 12.9 mL of 0.250 M KMnO4.What is the concentration of the diluted solution?

Accepted Answer

A) 1.70 M 
B) 1.45 M 
C) 0.0581 M 
D) 0.0430 M 
E) 0.0367 M 
A) 1.70 M 
B) 1.45 M 
C) 0.0581 M 
D) 0.0430 M 
E) 0.0367 M

20.5 milliliters of 0.506 M NaOH is required to titrate 25.0 milliliters of sulfuric acid of unknown concentration.Find the molarity of the acid.

What volume of 0.142 N hydrochloric acid will react with 10.00 mL of 0.117 N barium hydroxide?

Consider the following beaker which has had its contents (KBr and water)mixed until no further change occurs. Which of the following best describes the contents of the beaker?

What volume of 0.372 M H₂SO₄ contains 0.100 moles of solute?

Calculate the number of grams of ethyl alcohol (ethanol),C₂H₅OH,in 4.40 × 10² grams of a 23.0% solution.

Identify the incorrect statement about events that occur between the time excess solid solute is first introduced to a liquid solvent and the time when the solution becomes saturated.Assume that the surface area of the solute remains constant throughout the process.

When 2.77 g of a solute was dissolved in 25.0 g of water,the resulting solution had a freezing point of -3.06°C.What is the apparent molar mass of the solute? K_f of water is 1.86°C/m.

Calculate the increase in boiling point of a solution made by dissolving 40.0 g of glucose,C₆H₁₂O₆,in 250.0 g of water.K_b for water is 0.52°C/m.

The structures of cyclohexane and benzene are shown below. It is logical to expect that these liquids are:

Which of the following statements is incorrect?

Which of the following statements is incorrect?

Cu(OH)₂ can be obtained from the addition of excess NaOH solution to a solution of Cu(NO₃)₂ as shown in the figure. If the NaOH is added to 35.0 mL of 0.167 M Cu(NO₃)₂ and the precipitate isolated by filtration,what is the theoretical yield of the reaction?

What is the equivalent mass of sulfuric acid in the reaction H₂SO₄ + 2 NaOH → 2 H₂O + Na₂SO₄?

Consider the graph shown below. Which substance's solubility behaves the most like the solubility of a gas as the temperature is increased?

How many grams of Ba(OH)₂ are needed to prepare 2.50 liters of 0.200 M barium hydroxide solution?

What mass of cobalt(II)phosphate will precipitate when excess sodium phosphate solution is added to 100.0 mL 0.500 M cobalt(II)nitrate?

Which of the following correctly applies to the term "solution"?

75.0 mL of water is added to 12.9 mL of 0.250 M KMnO₄.What is the concentration of the diluted solution?

Matter and Energy

Measurement and Chemical Calculations

Introduction to Gases

Atomic Theory: The Nuclear Model of the Atom

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: The Quantum Model of the Atom

Chemical Bonding

Structure and Shape

The Ideal Gas Law and Its Applications

Gases, Liquids, and Solids

Acidbase Proton Transferreactions

Chemical Equilibrium

Oxidationreduction Electron Transferreactions

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Exam 16: Solutions

20.5 milliliters of 0.506 M NaOH is required to titrate 25.0 milliliters of sulfuric acid of unknown concentration.Find the molarity of the acid.

What volume of 0.142 N hydrochloric acid will react with 10.00 mL of 0.117 N barium hydroxide?

Consider the following beaker which has had its contents (KBr and water)mixed until no further change occurs. Which of the following best describes the contents of the beaker?

What volume of 0.372 M H2SO4 contains 0.100 moles of solute?

The citric acid in a lemon juice sample was neutralized by titration with NaOH solution.If 5.00 mL of lemon juice required 47.8 mL of 0.121 M NaOH for neutralization,what was the molarity of the citric acid in the lemon juice? The reaction is 3 NaOH + H3C6H5O7 → 3 H2O + Na3C6H5O7.

Calculate the number of grams of ethyl alcohol (ethanol),C2H5OH,in 4.40 × 102 grams of a 23.0% solution.

Identify the incorrect statement about events that occur between the time excess solid solute is first introduced to a liquid solvent and the time when the solution becomes saturated.Assume that the surface area of the solute remains constant throughout the process.

When 2.77 g of a solute was dissolved in 25.0 g of water,the resulting solution had a freezing point of -3.06°C.What is the apparent molar mass of the solute? Kf of water is 1.86°C/m.

Calculate the increase in boiling point of a solution made by dissolving 40.0 g of glucose,C6H12O6,in 250.0 g of water.Kb for water is 0.52°C/m.

The structures of cyclohexane and benzene are shown below. It is logical to expect that these liquids are:

Which of the following statements is incorrect?

Which of the following statements is incorrect?

Cu(OH)2 can be obtained from the addition of excess NaOH solution to a solution of Cu(NO3)2 as shown in the figure. If the NaOH is added to 35.0 mL of 0.167 M Cu(NO3)2 and the precipitate isolated by filtration,what is the theoretical yield of the reaction?

What is the equivalent mass of sulfuric acid in the reaction H2SO4 + 2 NaOH → 2 H2O + Na2SO4?

Consider the graph shown below. Which substance's solubility behaves the most like the solubility of a gas as the temperature is increased?

How many grams of Ba(OH)2 are needed to prepare 2.50 liters of 0.200 M barium hydroxide solution?

What mass of cobalt(II)phosphate will precipitate when excess sodium phosphate solution is added to 100.0 mL 0.500 M cobalt(II)nitrate?

Which of the following correctly applies to the term "solution"?

75.0 mL of water is added to 12.9 mL of 0.250 M KMnO4.What is the concentration of the diluted solution?

Matter and Energy

Measurement and Chemical Calculations

Introduction to Gases

Atomic Theory: The Nuclear Model of the Atom

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: The Quantum Model of the Atom

Chemical Bonding

Structure and Shape

The Ideal Gas Law and Its Applications

Gases, Liquids, and Solids

Acidbase Proton Transferreactions

Chemical Equilibrium

Oxidationreduction Electron Transferreactions

Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

What volume of 0.372 M H₂SO₄ contains 0.100 moles of solute?

Calculate the number of grams of ethyl alcohol (ethanol),C₂H₅OH,in 4.40 × 10² grams of a 23.0% solution.

When 2.77 g of a solute was dissolved in 25.0 g of water,the resulting solution had a freezing point of -3.06°C.What is the apparent molar mass of the solute? K_f of water is 1.86°C/m.

Calculate the increase in boiling point of a solution made by dissolving 40.0 g of glucose,C₆H₁₂O₆,in 250.0 g of water.K_b for water is 0.52°C/m.

Cu(OH)₂ can be obtained from the addition of excess NaOH solution to a solution of Cu(NO₃)₂ as shown in the figure. If the NaOH is added to 35.0 mL of 0.167 M Cu(NO₃)₂ and the precipitate isolated by filtration,what is the theoretical yield of the reaction?

What is the equivalent mass of sulfuric acid in the reaction H₂SO₄ + 2 NaOH → 2 H₂O + Na₂SO₄?

How many grams of Ba(OH)₂ are needed to prepare 2.50 liters of 0.200 M barium hydroxide solution?

75.0 mL of water is added to 12.9 mL of 0.250 M KMnO₄.What is the concentration of the diluted solution?