Question 1

A 0.307-g sample of an unknown triprotic acid is titrated to the third equivalence point using 35.2 mL of 0.106 M NaOH.Calculate the molar mass of the acid.

Accepted Answer

A)  247 g/mol
B)  171 g/mol
C)  165 g/mol
D)  151 g/mol
E)  82.7 g/molF) A) and B)
G) C) and D) A

Question 2

In the reaction 2Ca(s) + O2(g)  →	o→  2CaO(s) ,which species is oxidized?

Accepted Answer

A)  O2
B)  O2-
C)  Ca
D)  Ca2+
E)  none of these F) None of the above
G) All of the above

Question 3

When solutions of strontium chloride and sodium sulfate react,which of the following is a spectator ion?

Accepted Answer

A)  strontium ion
B)  chloride ion
C)  sodium ion
D)  sulfate ion
E)  two of theseF) A) and B)
G) None of the above

Question 4

When solutions of phosphoric acid and iron(III) nitrate react,which of the following terms will be present in the balanced molecular equation?

Accepted Answer

A)  HNO3(aq) 
B)  3HNO3(aq) 
C)  2FePO4(s) 
D)  3FePO4(s) 
E)  2HNO3(aq) F) A) and B)
G) A) and E)

Question 5

In which of the following does nitrogen have an oxidation state of +4?

Accepted Answer

A)  HNO3
B)  NO2
C)  N2O
D)  NH4Cl
E)  NaNO2F) B) and E)
G) A) and B)

Question 6

Molarity is defined as __________ of solute per volume of solution in ___________.

Accepted Answer

The answer of Molarity is defined as __________ of solute...

Question 7

Which of the following is paired incorrectly?

Accepted Answer

A)  H2SO4 - strong acid
B)  HNO3 - weak acid
C)  Ba(OH) 2 - strong base
D)  HCl - strong acid
E)  NH3 - weak baseF) A) and B)
G) All of the above

Question 8

Which of the following do you need to know to be able to calculate the molarity of a salt solution?
I.the mass of salt added
II.the molar mass of the salt
III.the volume of water added
IV.the total volume of the solution

Accepted Answer

A)  I,III
B)  I,II,III
C)  II,III
D)  I,II,IV
E)  You need all of the information.F) B) and D)
G) A) and E) D

Question 9

In the reaction Zn + H2SO4  →	o→ ZnSO4 + H2,which,if any,element is oxidized?

Accepted Answer

A)  zinc
B)  hydrogen
C)  sulfur
D)  oxygen
E)  none of these F) B) and E)
G) D) and E)

Question 10

In the reaction N2(g) + 3H2(g)  →	o→  2NH3(g) ,N2 is

Accepted Answer

A)  oxidized
B)  reduced
C)  the electron donor
D)  the reducing agent
E)  two of these F) A) and E)
G) A) and D)

Question 11

You have 75.0 mL of a 2.50 M solution of Na2CrO4(aq) .You also have 125 mL of a 1.88 M solution of AgNO3(aq) .Calculate the concentration of NO3- after the two solutions are mixed together.

Accepted Answer

A)  0.00 M
B)  0.588 M
C)  1.18 M
D)  2.35 M
E)  4.50 MF) C) and E)
G) A) and B)

Question 12

When solutions of carbonic acid and copper(II) hydroxide react,which of the following are spectator ions?

Accepted Answer

A)  hydrogen ion
B)  carbonate ion
C)  copper(II) ion
D)  hydroxide ion
E)  none of theseF) B) and E)
G) A) and E)

Question 13

Given the reaction: 2MnO4- + 5H2O2 + 6H+  →	o→ 2Mn2+ + 8H2O + 5O2
Determine the number of electrons involved in this reaction.

Accepted Answer

A)  10
B)  8
C)  6
D)  4
E)  2 F) A) and E)
G) A) and D) A

Question 14

Balance the following equation: KI + HNO3 $\to$ KNO3 + NO + I2 + H2O

Accepted Answer

6KI + 8HNO₃

Question 15

The net ionic equation for the reaction of calcium bromide and sodium phosphate contains which of the following species?

Accepted Answer

A)  2Br-(aq) 
B)  PO43-(aq) 
C)  2Ca3(PO4) 2(s) 
D)  6NaBr(aq) 
E)  3Ca2+(aq) F) B) and C)
G) B) and D)

Question 16

The net ionic equation for the reaction of aluminum sulfate and sodium hydroxide contains which of the following species?

Accepted Answer

A)  3Al3+(aq) 
B)  OH-(aq) 
C)  3OH-(aq) 
D)  2Al3+(aq) 
E)  2Al(OH) 3(s) F) A) and E)
G) C) and E)

Question 17

Which of the following is not a strong base?

Accepted Answer

A)  Ca(OH) 2
B)  KOH
C)  NH3
D)  LiOH
E)  Sr(OH) 2F) C) and D)
G) B) and E)

Question 18

The following reactions 
2K(s) + Br2(l)  →	o→ 2KBr(s) 
AgNO3(aq) + NaCl(aq)  →	o→  AgCl(s) + NaNO3(aq) 
HCl(aq) + KOH(aq)  →	o→  H2O(l) + KCl(aq) 
Are examples of

Accepted Answer

A)  precipitation reactions
B)  redox,precipitation,and acid-base,respectively
C)  precipitation (two) and acid-base reactions,respectively
D)  redox reactions
E)  none of these F) A) and E)
G) D) and E)

Question 19

You have separate solutions of HCl and H2SO4 with the same concentrations in terms of molarity.You wish to neutralize a solution of NaOH.Which acid solution would require more volume (in mL) to neutralize the base?

Accepted Answer

A)  The HCl solution.
B)  The H2SO4 solution.
C)  You need to know the acid concentrations to answer this question.
D)  You need to know the volume and concentration of the NaOH solution to answer this question.
E)  C and DF) A) and B)
G) C) and E)

Question 20

In the reaction C(s) + O2(g)  →	o→ CO2(g) carbon is __________.

Accepted Answer

A)  the reducing agent
B)  the electron acceptor
C)  reduced
D)  the oxidizing agent
E)  more than one of these F) A) and E)
G) A) and B)

Exam 4: Chemical Reactions and Solutions Stoichiometry

A 0.307-g sample of an unknown triprotic acid is titrated to the third equivalence point using 35.2 mL of 0.106 M NaOH.Calculate the molar mass of the acid.

Correct AnswerverifiedA

In the reaction 2Ca(s) + O2(g) →\to→ 2CaO(s) ,which species is oxidized?

Correct AnswerverifiedShow Answer

When solutions of strontium chloride and sodium sulfate react,which of the following is a spectator ion?

Correct AnswerverifiedShow Answer

When solutions of phosphoric acid and iron(III) nitrate react,which of the following terms will be present in the balanced molecular equation?

Correct AnswerverifiedShow Answer

In which of the following does nitrogen have an oxidation state of +4?

Correct AnswerverifiedShow Answer

Molarity is defined as __________ of solute per volume of solution in ___________.

Correct AnswerverifiedShow Answer

Which of the following is paired incorrectly?

Correct AnswerverifiedShow Answer

Which of the following do you need to know to be able to calculate the molarity of a salt solution? I.the mass of salt added II.the molar mass of the salt III.the volume of water added IV.the total volume of the solution

Correct AnswerverifiedD

In the reaction Zn + H2SO4 →\to→ ZnSO4 + H2,which,if any,element is oxidized?

Correct AnswerverifiedShow Answer

In the reaction N2(g) + 3H2(g) →\to→ 2NH3(g) ,N2 is

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You have 75.0 mL of a 2.50 M solution of Na2CrO4(aq) .You also have 125 mL of a 1.88 M solution of AgNO3(aq) .Calculate the concentration of NO3- after the two solutions are mixed together.

Correct AnswerverifiedShow Answer

When solutions of carbonic acid and copper(II) hydroxide react,which of the following are spectator ions?

Correct AnswerverifiedShow Answer

Given the reaction: 2MnO4- + 5H2O2 + 6H+ →\to→ 2Mn2+ + 8H2O + 5O2 Determine the number of electrons involved in this reaction.

Correct AnswerverifiedA

Balance the following equation: KI + HNO3 →\to→ KNO3 + NO + I2 + H2O

Correct Answerverified6KI + 8HNO3View AnswerShow Answer

The net ionic equation for the reaction of calcium bromide and sodium phosphate contains which of the following species?

Correct AnswerverifiedShow Answer

The net ionic equation for the reaction of aluminum sulfate and sodium hydroxide contains which of the following species?

Correct AnswerverifiedShow Answer

Which of the following is not a strong base?

Correct AnswerverifiedShow Answer

The following reactions 2K(s) + Br2(l) →\to→ 2KBr(s) AgNO3(aq) + NaCl(aq) →\to→ AgCl(s) + NaNO3(aq) HCl(aq) + KOH(aq) →\to→ H2O(l) + KCl(aq) Are examples of

Correct AnswerverifiedShow Answer

You have separate solutions of HCl and H2SO4 with the same concentrations in terms of molarity.You wish to neutralize a solution of NaOH.Which acid solution would require more volume (in mL) to neutralize the base?

Correct AnswerverifiedShow Answer

In the reaction C(s) + O2(g) →\to→ CO2(g) carbon is __________.

Correct AnswerverifiedShow Answer

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In the reaction 2Ca(s) + O₂(g) $\to$ 2CaO(s) ,which species is oxidized?

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Molarity is defined as of solute per volume of solution in _.

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In the reaction Zn + H₂SO₄ $\to$ ZnSO₄ + H₂,which,if any,element is oxidized?

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In the reaction N₂(g) + 3H₂(g) $\to$ 2NH₃(g) ,N₂ is

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You have 75.0 mL of a 2.50 M solution of Na₂CrO₄(aq) .You also have 125 mL of a 1.88 M solution of AgNO₃(aq) .Calculate the concentration of NO₃^- after the two solutions are mixed together.

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Given the reaction: 2MnO₄^- + 5H₂O₂ + 6H⁺ $\to$ 2Mn²⁺ + 8H₂O + 5O₂ Determine the number of electrons involved in this reaction.

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Balance the following equation: KI + HNO₃ $\to$ KNO₃ + NO + I₂ + H₂O

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6KI + 8HNO_{3View Answer}

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The following reactions 2K(s) + Br₂(l) $\to$ 2KBr(s) AgNO₃(aq) + NaCl(aq) $\to$ AgCl(s) + NaNO₃(aq) HCl(aq) + KOH(aq) $\to$ H₂O(l) + KCl(aq) Are examples of

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You have separate solutions of HCl and H₂SO₄ with the same concentrations in terms of molarity.You wish to neutralize a solution of NaOH.Which acid solution would require more volume (in mL) to neutralize the base?

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In the reaction C(s) + O₂(g) $\to$ CO₂(g) carbon is __________.

Correct Answer
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