Question 1

A solution contains the ions Ag+, Pb2+, and Ni2+. Dilute solutions of NaCl, Na2SO4, and Na2S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order?

Accepted Answer

A)   Na2S, NaCl, Na2SO4
B)   Na2SO4, NaCl, Na2S
C)   Na2SO4, Na2S, NaCl
D)   NaCl, Na2S, Na2SO4
E)   NaCl, Na2SO4, Na2S

Question 2

Consider five solutions that all have the same mass of solute in 100.0 mL of solution. Which has the highest concentration as measured in molarity?

Accepted Answer

A)   Na2SO4
B)   NaF
C)   KCl
D)   CaCl2
E)   NaCl

Question 3

If all of the chloride in a 5.000-g sample of an unknown metal chloride is precipitated as AgCl with 70.90 mL of 0.2010 M AgNO3, what is the percentage of chloride in the sample?

Accepted Answer

A)   1.425%
B)   20.22%
C)   50.55%
D)   10.10%
E)   none of these

Question 4

What is the net ionic equation for the reaction of aqueous sodium hydroxide with aqueous nitric acid?

Accepted Answer

A)   Na+(aq)  + OH-(aq)  + H+(aq)  + NO3-(aq)  → NaOH(s)  + HNO3(l) 
B)   H+(aq)  + OH-(aq)  → H2O(l) 
C)   Na+(aq)  + OH-(aq)  → NaOH(s) 
D)   Na+(aq)  + OH-(aq)  + H+(aq)  + NO3-(aq)  → Na+(aq)  + NO3-(aq)  + H2O(l) 
E)   none of these

Question 5

Which of the following statements is/are true of water?
1. An individual water molecule is V-shaped, with an H-O-H angle of about 105°. 2. The O-H bonds in a water molecule are ionic bonds. 3. Polar and ionic substances are more soluble in water than nonpolar substances.

Accepted Answer

A)   1 only
B)   2 only​
C)   3 only
D)   1 and 2
E)   ​1 and 3 E

Question 6

When aqueous solutions of silver nitrate and potassium chromate are mixed, the blood-red precipitate silver chromate is formed. If 10.0 mL of 0.25 M aqueous silver nitrate is mixed with 15.0 mL of 0.14 M aqueous potassium chromate, what is the total concentration of ions in the solution after the precipitate is formed?

Accepted Answer

A)   0.14 M
B)   0.39 M
C)   0.30 M
D)   0.50 M
E)   0.25 M

Question 7

Sulfamic acid, HSO3NH2 (molar mass = 97.1 g/mol) , is a strong monoprotic acid that can be used to standardize a strong base:
HSO3NH2(aq)  + KOH(aq)  → KSO2NH2(aq)  + H2O(l) 
A 0) 179-g sample of HSO3NH2 required 19.4 mL of an aqueous solution of KOH for complete reaction. What is the molarity of the KOH solution?

Accepted Answer

A)   9.25 M
B)   0.194 M
C)   9.50 × 10-5 M
D)   0.0950 M
E)   none of these

Question 8

Reacting 35.4 mL of 0.220 M AgNO3 with 52.0 mL of 0.420 M K2CrO4 results in what mass of solid formed?

Accepted Answer

A)   2.21 g
B)   4.89 g
C)   1.29 g
D)   1.74 g
E)   7.25g

Question 9

What is the oxidation state of chromium in K2Cr2O7?

Accepted Answer

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

Question 10

What volume of 0.350 M KOH is required to react completely with 24.0 mL of 0.650 M H3PO4?

Accepted Answer

A)   52.0 mL
B)   156 mL
C)   26.0 mL
D)   104 mL
E)   none of these E

Question 11

Which of the following reactions does not involve oxidation-reduction?

Accepted Answer

A)   LiOH + HI → H2O + LiI
B)   Mg + 2HI → MgI2 + H2
C)   Ca + 2H2O → Ca(OH) 2 + H2
D)   MnO2 + 4HI → I2 + 2H2O + MnI2
E)   CH4 +2O2 → 2H2O + CO2

Question 12

A 0.338-g sample of an unknown triprotic acid is titrated to the third equivalence point using 33.4 mL of 0.163M NaOH. Calculate the molar mass of the acid.

Accepted Answer

A)   5.44 g/mol
B)   1.86× 102 g/mol
C)   20.7 g/mol
D)   69.3 g/mol
E)   62.1 g/mol

Question 13

The following reaction occurs in aqueous acid solution:
NO3- + I- → IO3- + NO2
In the balanced equation, what is the coefficient of NO3-?

Accepted Answer

A)   2
B)   3
C)   4
D)   5
E)   6

Question 14

1.00 mL of a 3.50 × 10-4 M solution of oleic acid is diluted with 9.00 mL of petroleum ether, forming solution A. 2.00 mL of solution A is diluted with 8.00 mL of petroleum ether, forming solution B. How many grams of oleic acid are in 5.00 mL of solution B? (molar mass for oleic acid = 282 g/mol)

Accepted Answer

A)   9.87 × 10-6 g
B)   4.94 × 10-5 g
C)   4.94 × 10-4 g
D)   1.97 × 10-6 g
E)   7.00 × 10-6 g

Question 15

Aqueous solutions of lead nitrate and potassium chloride are mixed and a precipitate forms. Which pair of ions are spectator ions?

Accepted Answer

A)   
B)   
C)   
D)   
E)   All of the above

Question 16

Identify each of the following unbalanced reactions using the following choices:
a) Precipitation reaction
b) Acid-base reaction
c) Oxidation-reduction reaction
d) Combustion reaction
e) More than one of answers a-d apply.
-H2SO4 + Ba(OH)2 → BaSO4 + H2O

Accepted Answer

e) More th...

Question 17

A 230.-mL sample of a 0.275 M solution is left on a hot plate overnight; the following morning the solution is 1.10 M. What volume of solvent has evaporated from the 0.275 M solution? (Assume volumes are additive.)

Accepted Answer

A)   288 mL
B)   172 mL
C)   63.3 mL
D)  230. mL
E)   58.0 mL B

Question 18

You mix 50.0 mL of 2.00 M lead(II)  nitrate with 50.0 mL of 2.00 M sodium chloride. What mass of lead(II)  chloride should you form?

Accepted Answer

A)   12.1 g
B)   13.9 g
C)   27.8 g
D)   24.3 g
E)   none of these

Question 19

A 5.98-g sample consisting of a mixture of silver nitrate and sodium nitrate is dissolved in water. This aqueous mixture then reacts with aqueous barium chloride to form 3.90 g of silver chloride. Calculate the percent by mass of silver nitrate in the first mixture.

Accepted Answer

A)   77.3%
B)   55.0%
C)   46.2%
D)   53.2%
E)   94.7%

Question 20

Write the balanced molecular equation for the reaction between aqueous solutions of lithium phosphate and sodium hydroxide.

Accepted Answer

Li₃PO₄(aq) +...

Exam 4: Types of Chemical Reactions and Solution Stoichiometry

A solution contains the ions Ag⁺, Pb²⁺, and Ni²⁺. Dilute solutions of NaCl, Na₂SO₄, and Na₂S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order?

Correct Answer
verified

Consider five solutions that all have the same mass of solute in 100.0 mL of solution. Which has the highest concentration as measured in molarity?

Correct Answer
verified

If all of the chloride in a 5.000-g sample of an unknown metal chloride is precipitated as AgCl with 70.90 mL of 0.2010 M AgNO₃, what is the percentage of chloride in the sample?

Correct Answer
verified

What is the net ionic equation for the reaction of aqueous sodium hydroxide with aqueous nitric acid?

Correct Answer
verified

Which of the following statements is/are true of water? 1. An individual water molecule is V-shaped, with an H-O-H angle of about 105°. 2. The O-H bonds in a water molecule are ionic bonds. 3. Polar and ionic substances are more soluble in water than nonpolar substances.

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Reacting 35.4 mL of 0.220 M AgNO₃ with 52.0 mL of 0.420 M K₂CrO₄ results in what mass of solid formed?

Correct Answer
verified

What is the oxidation state of chromium in K₂Cr₂O₇?

Correct Answer
verified

What volume of 0.350 M KOH is required to react completely with 24.0 mL of 0.650 M H₃PO₄?

Correct Answer
verified
E

Which of the following reactions does not involve oxidation-reduction?

Correct Answer
verified

A 0.338-g sample of an unknown triprotic acid is titrated to the third equivalence point using 33.4 mL of 0.163M NaOH. Calculate the molar mass of the acid.

Correct Answer
verified

The following reaction occurs in aqueous acid solution: NO₃^- + I^- → IO₃^- + NO₂ In the balanced equation, what is the coefficient of NO₃^-?

Correct Answer
verified

1.00 mL of a 3.50 × 10^-4 M solution of oleic acid is diluted with 9.00 mL of petroleum ether, forming solution A. 2.00 mL of solution A is diluted with 8.00 mL of petroleum ether, forming solution B. How many grams of oleic acid are in 5.00 mL of solution B? (molar mass for oleic acid = 282 g/mol)

Correct Answer
verified

Aqueous solutions of lead nitrate and potassium chloride are mixed and a precipitate forms. Which pair of ions are spectator ions?

Correct Answer
verified

Identify each of the following unbalanced reactions using the following choices: a) Precipitation reaction b) Acid-base reaction c) Oxidation-reduction reaction d) Combustion reaction e) More than one of answers a-d apply. -H₂SO₄ + Ba(OH)₂ → BaSO₄ + H₂O

Correct Answer
verified
e) More th...
View Answer

A 230.-mL sample of a 0.275 M solution is left on a hot plate overnight; the following morning the solution is 1.10 M. What volume of solvent has evaporated from the 0.275 M solution? (Assume volumes are additive.)

Correct Answer
verified
B

You mix 50.0 mL of 2.00 M lead(II) nitrate with 50.0 mL of 2.00 M sodium chloride. What mass of lead(II) chloride should you form?

Correct Answer
verified

A 5.98-g sample consisting of a mixture of silver nitrate and sodium nitrate is dissolved in water. This aqueous mixture then reacts with aqueous barium chloride to form 3.90 g of silver chloride. Calculate the percent by mass of silver nitrate in the first mixture.

Correct Answer
verified

Write the balanced molecular equation for the reaction between aqueous solutions of lithium phosphate and sodium hydroxide.

Correct Answer
verified
Li₃PO₄(aq) +...
View Answer

Exam 4: Types of Chemical Reactions and Solution Stoichiometry

A solution contains the ions Ag+, Pb2+, and Ni2+. Dilute solutions of NaCl, Na2SO4, and Na2S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order?

Correct AnswerverifiedShow Answer

Consider five solutions that all have the same mass of solute in 100.0 mL of solution. Which has the highest concentration as measured in molarity?

Correct AnswerverifiedShow Answer

If all of the chloride in a 5.000-g sample of an unknown metal chloride is precipitated as AgCl with 70.90 mL of 0.2010 M AgNO3, what is the percentage of chloride in the sample?

Correct AnswerverifiedShow Answer

What is the net ionic equation for the reaction of aqueous sodium hydroxide with aqueous nitric acid?

Correct AnswerverifiedShow Answer

Which of the following statements is/are true of water? 1. An individual water molecule is V-shaped, with an H-O-H angle of about 105°. 2. The O-H bonds in a water molecule are ionic bonds. 3. Polar and ionic substances are more soluble in water than nonpolar substances.

Correct AnswerverifiedE

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Reacting 35.4 mL of 0.220 M AgNO3 with 52.0 mL of 0.420 M K2CrO4 results in what mass of solid formed?

Correct AnswerverifiedShow Answer

What is the oxidation state of chromium in K2Cr2O7?

Correct AnswerverifiedShow Answer

What volume of 0.350 M KOH is required to react completely with 24.0 mL of 0.650 M H3PO4?

Correct AnswerverifiedE

Which of the following reactions does not involve oxidation-reduction?

Correct AnswerverifiedShow Answer

A 0.338-g sample of an unknown triprotic acid is titrated to the third equivalence point using 33.4 mL of 0.163M NaOH. Calculate the molar mass of the acid.

Correct AnswerverifiedShow Answer

The following reaction occurs in aqueous acid solution: NO3- + I- → IO3- + NO2 In the balanced equation, what is the coefficient of NO3-?

Correct AnswerverifiedShow Answer

1.00 mL of a 3.50 × 10-4 M solution of oleic acid is diluted with 9.00 mL of petroleum ether, forming solution A. 2.00 mL of solution A is diluted with 8.00 mL of petroleum ether, forming solution B. How many grams of oleic acid are in 5.00 mL of solution B? (molar mass for oleic acid = 282 g/mol)

Correct AnswerverifiedShow Answer

Aqueous solutions of lead nitrate and potassium chloride are mixed and a precipitate forms. Which pair of ions are spectator ions?

Correct AnswerverifiedShow Answer

Identify each of the following unbalanced reactions using the following choices: a) Precipitation reaction b) Acid-base reaction c) Oxidation-reduction reaction d) Combustion reaction e) More than one of answers a-d apply. -H2SO4 + Ba(OH)2 → BaSO4 + H2O

Correct Answerverifiede) More th...View AnswerShow Answer

A 230.-mL sample of a 0.275 M solution is left on a hot plate overnight; the following morning the solution is 1.10 M. What volume of solvent has evaporated from the 0.275 M solution? (Assume volumes are additive.)

Correct AnswerverifiedB

You mix 50.0 mL of 2.00 M lead(II) nitrate with 50.0 mL of 2.00 M sodium chloride. What mass of lead(II) chloride should you form?

Correct AnswerverifiedShow Answer

A 5.98-g sample consisting of a mixture of silver nitrate and sodium nitrate is dissolved in water. This aqueous mixture then reacts with aqueous barium chloride to form 3.90 g of silver chloride. Calculate the percent by mass of silver nitrate in the first mixture.

Correct AnswerverifiedShow Answer

Write the balanced molecular equation for the reaction between aqueous solutions of lithium phosphate and sodium hydroxide.

Correct AnswerverifiedLi3PO4(aq) +...View AnswerShow Answer

A solution contains the ions Ag⁺, Pb²⁺, and Ni²⁺. Dilute solutions of NaCl, Na₂SO₄, and Na₂S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order?

Correct Answer
verified

Correct Answer
verified

If all of the chloride in a 5.000-g sample of an unknown metal chloride is precipitated as AgCl with 70.90 mL of 0.2010 M AgNO₃, what is the percentage of chloride in the sample?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Reacting 35.4 mL of 0.220 M AgNO₃ with 52.0 mL of 0.420 M K₂CrO₄ results in what mass of solid formed?

Correct Answer
verified

What is the oxidation state of chromium in K₂Cr₂O₇?

Correct Answer
verified

What volume of 0.350 M KOH is required to react completely with 24.0 mL of 0.650 M H₃PO₄?

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

The following reaction occurs in aqueous acid solution: NO₃^- + I^- → IO₃^- + NO₂ In the balanced equation, what is the coefficient of NO₃^-?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Identify each of the following unbalanced reactions using the following choices: a) Precipitation reaction b) Acid-base reaction c) Oxidation-reduction reaction d) Combustion reaction e) More than one of answers a-d apply. -H₂SO₄ + Ba(OH)₂ → BaSO₄ + H₂O

Correct Answer
verified
e) More th...
View Answer

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Li₃PO₄(aq) +...
View Answer