Question 1

The titration of 25.0 mL of an unknown concentration H2SO4 solution requires 83.6 mL of 0.12 M LiOH solution.What is the concentration of the H2SO4 solution (in M) ?

Accepted Answer

A)  0.20 M
B)  0.40 M
C)  0.10 M
D)  0.36 M
E)  0.25 MF) All of the above
G) C) and D)

Question 2

What mass of N2 will be produced from the reaction of 50.0 g N2O4 with 45.0 g N2H4?
N2O4(l) + 2 N2H4(l) → 3 N2(g) + 4 H2O(g)

Accepted Answer

A)  59.0 g
B)  118 g
C)  152 g
D)  45.7 gE) None of the above
F) A) and B)

Question 3

How many moles of CH3CH2OH are contained in 548 mL of 0.0788 M CH3CH2OH solution?

Accepted Answer

A)  4.32 × 10-2 mol
B)  2.32 × 10-2 mol
C)  6.95 × 10-2 mol
D)  1.44 × 10-2 mol
E)  5.26 × 10-2 molF) B) and D)
G) A) and B)

Question 4

Sodium metal and water react to form hydrogen and sodium hydroxide.If 5.98 g of sodium react with water to form 0.26 g of hydrogen and 10.40 g of sodium hydroxide,what mass of water was involved in the reaction?

Accepted Answer

A)  4.68 g
B)  5.98 g
C)  10.14 g
D)  10.66 gE) All of the above
F) A) and B)

Question 5

5.0 g of iron is reacted with 5.0 g of water according to the chemical equation shown below.Which one of the following statements is FALSE?
3 Fe(s) + 4 H2O(l) → Fe3O4(s) + 4 H2(g)

Accepted Answer

A)  6.91 g of Fe3O4 are produced.
B)  2.85 g of H2O are left over.
C)  Mass is conserved in this reaction.
D)  Water is the limiting reactant.E) A) and D)
F) B) and C)

Question 6

Explain the difference between a strong and weak electrolyte.Give an example of each.

Accepted Answer

A strong electrolyte is either an ionic ...

Question 7

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

Accepted Answer

A)  Ca(OH) 2 and KOH
B)  H2C2O4 and HI
C)  only HI
D)  only KOHE) B) and C)
F) None of the above

Question 8

Determine the oxidation state of Cl in NaClO3.

Accepted Answer

A)  +6
B)  +4
C)  +3
D)  +2
E)  +5F) B) and C)
G) C) and D)

Question 9

Carbonic acid can form water and carbon dioxide upon heating.How much carbon dioxide is formed from 6.20 g of carbonic acid?
H2CO3 → H2O + CO2

Accepted Answer

A)  4.40 g
B)  8.80 g
C)  2.20 g
D)  6.20 gE) B) and D)
F) B) and C)

Question 10

In an acid-base neutralization reaction 38.74 mL of 0.500 M potassium hydroxide reacts with 50.00 mL of sulfuric acid solution.What is the concentration of the H2SO4 solution?

Accepted Answer

A)  0.194 M
B)  0.387 M
C)  0.775 M
D)  1.29 ME) C) and D)
F) A) and B)

Question 11

Which of the following is not a strong electrolyte?

Accepted Answer

A)  CaS
B)  LiSO4
C)  NH4OH
D)  CH3CH2CH3
E)  Na2CO3F) None of the above
G) A) and E)

Question 12

Determine the percent yield of a reaction that produces 28.65 g of Fe when 50.00 g of Fe2O3 react with excess Al according to the following reaction.
Fe2O3(s) + 2 Al(s) → Al2O3(s) + 2 Fe(s)

Accepted Answer

A)  61.03%
B)  28.65%
C)  57.30%
D)  20.02%
E)  81.93%F) A) and C)
G) D) and E)

Question 13

How many milliliters of a stock solution of 11.1 M HNO3 would be needed to prepare 0.500 L of 0.500 M HNO3?

Accepted Answer

A)  0.0444 mL
B)  22.5 mL
C)  2.78 mL
D)  44.4 mL
E)  0.0225 mLF) D) and E)
G) B) and E)

Question 14

If the percent yield for the following reaction is 65.0%,how many grams of KClO3 are needed to produce 32.0 g of O2?
2 KClO3(s) → 2 KCl(s) + 3 O2(g)

Accepted Answer

A)  53.1 g
B)  81.7 g
C)  126 g
D)  283 gE) A) and D)
F) A) and C)

Question 15

A stock solution of HNO3 is prepared and found to contain 13.5 M of HNO3.If 25.0 mL of the stock solution is diluted to a final volume of 0.500 L,the concentration of the diluted solution is ________ M.

Accepted Answer

A)  0.270
B)  1.48
C)  0.675
D)  675
E)  270F) B) and E)
G) C) and E)

Question 16

What volume of a 0.540 M NaOH solution contains 11.5 g of NaOH?

Accepted Answer

A)  0.155 L
B)  0.532 L
C)  1.88 L
D)  6.44 LE) A) and B)
F) A) and C)

Question 17

Lead ions can be precipitated from aqueous solutions by the addition of aqueous iodide:
Pb2+(aq) + 2I-(aq) → PbI2(s) 
Lead iodide is virtually insoluble in water so that the reaction appears to go to completion.How many milliliters of 3.550 M HI(aq) must be added to a solution containing 0.700 mol of Pb(NO3) 2(aq) to completely precipitate the lead?

Accepted Answer

A)  2.54 × 10-3 mL
B)  394 mL
C)  197 mL
D)  0.197 mL
E)  0.394 mLF) A) and D)
G) C) and E)

Question 18

Match the following.
-Mg(s) + Cu(NO3) 2(aq) → Mg(NO3) 2(aq) + Cu(s)

Accepted Answer

A)  combustion
B)  acid base
C)  oxidation reduction
D)  gas evolution
E)  precipitationF) C) and D)
G) B) and E)

Question 19

What reagent could not be used to separate Br- from CO32- when added to an aqueous solution containing both?

Accepted Answer

A)  AgNO3(aq) 
B)  Ca(NO3) 2(aq) 
C)  Cu(NO3) 2(aq) 
D)  Fe(NO3) 2(aq) E) C) and D)
F) All of the above

Question 20

Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of Na2CO3 and HCl are mixed.

Accepted Answer

A)  2 H+(aq) + CO32-(aq) → H2CO3(s) 
B)  2 Na+(aq) + CO32-(aq) + 2 H+(aq) + 2 Cl-(aq) → H2CO3(s) + 2 NaCl(aq) 
C)  2 H+(aq) + CO32-(aq) → H2O(l) + CO2(g) 
D)  2 Na+(aq) + CO32-(aq) + 2 H+(aq) + 2 Cl-(aq) → H2CO3(s) + 2 Na+(aq) + 2 Cl-(aq) 
E)  No reaction occurs.F) B) and E)
G) C) and D)

Exam 4: Chemical Quantities and Aqueous Reactions

Sodium metal and water react to form hydrogen and sodium hydroxide.If 5.98 g of sodium react with water to form 0.26 g of hydrogen and 10.40 g of sodium hydroxide,what mass of water was involved in the reaction?

Correct Answer
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What volume of a 0.540 M NaOH solution contains 11.5 g of NaOH?

Correct Answer
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The titration of 25.0 mL of an unknown concentration H₂SO₄ solution requires 83.6 mL of 0.12 M LiOH solution.What is the concentration of the H₂SO₄ solution (in M) ?

Correct Answer
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Carbonic acid can form water and carbon dioxide upon heating.How much carbon dioxide is formed from 6.20 g of carbonic acid? H₂CO₃ → H₂O + CO₂

Correct Answer
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Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of Na₂CO₃ and HCl are mixed.

Correct Answer
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Determine the oxidation state of Cl in NaClO₃.

Correct Answer
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Which of the following is not a strong electrolyte?

Correct Answer
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Explain the difference between a strong and weak electrolyte.Give an example of each.

Correct Answer
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A strong electrolyte is either an ionic ...
View Answer

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

Correct Answer
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A stock solution of HNO₃ is prepared and found to contain 13.5 M of HNO₃.If 25.0 mL of the stock solution is diluted to a final volume of 0.500 L,the concentration of the diluted solution is ________ M.

Correct Answer
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Match the following. -Mg(s) + Cu(NO₃) ₂(aq) → Mg(NO₃) ₂(aq) + Cu(s)

Correct Answer
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How many milliliters of a stock solution of 11.1 M HNO₃ would be needed to prepare 0.500 L of 0.500 M HNO₃?

Correct Answer
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If the percent yield for the following reaction is 65.0%,how many grams of KClO₃ are needed to produce 32.0 g of O₂? 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g)

Correct Answer
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How many moles of CH₃CH₂OH are contained in 548 mL of 0.0788 M CH₃CH₂OH solution?

Correct Answer
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What reagent could not be used to separate Br^- from CO₃^2- when added to an aqueous solution containing both?

Correct Answer
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What mass of N₂ will be produced from the reaction of 50.0 g N₂O₄ with 45.0 g N₂H₄? N₂O₄(l) + 2 N₂H₄(l) → 3 N₂(g) + 4 H₂O(g)

Correct Answer
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Correct Answer
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In an acid-base neutralization reaction 38.74 mL of 0.500 M potassium hydroxide reacts with 50.00 mL of sulfuric acid solution.What is the concentration of the H₂SO₄ solution?

Correct Answer
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Determine the percent yield of a reaction that produces 28.65 g of Fe when 50.00 g of Fe₂O₃ react with excess Al according to the following reaction. Fe₂O₃(s) + 2 Al(s) → Al₂O₃(s) + 2 Fe(s)

Correct Answer
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5.0 g of iron is reacted with 5.0 g of water according to the chemical equation shown below.Which one of the following statements is FALSE? 3 Fe(s) + 4 H₂O(l) → Fe₃O₄(s) + 4 H₂(g)

Correct Answer
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Exam 4: Chemical Quantities and Aqueous Reactions

Sodium metal and water react to form hydrogen and sodium hydroxide.If 5.98 g of sodium react with water to form 0.26 g of hydrogen and 10.40 g of sodium hydroxide,what mass of water was involved in the reaction?

Correct AnswerverifiedShow Answer

What volume of a 0.540 M NaOH solution contains 11.5 g of NaOH?

Correct AnswerverifiedShow Answer

The titration of 25.0 mL of an unknown concentration H2SO4 solution requires 83.6 mL of 0.12 M LiOH solution.What is the concentration of the H2SO4 solution (in M) ?

Correct AnswerverifiedShow Answer

Carbonic acid can form water and carbon dioxide upon heating.How much carbon dioxide is formed from 6.20 g of carbonic acid? H2CO3 → H2O + CO2

Correct AnswerverifiedShow Answer

Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of Na2CO3 and HCl are mixed.

Correct AnswerverifiedShow Answer

Determine the oxidation state of Cl in NaClO3.

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Which of the following is not a strong electrolyte?

Correct AnswerverifiedShow Answer

Explain the difference between a strong and weak electrolyte.Give an example of each.

Correct AnswerverifiedA strong electrolyte is either an ionic ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

A stock solution of HNO3 is prepared and found to contain 13.5 M of HNO3.If 25.0 mL of the stock solution is diluted to a final volume of 0.500 L,the concentration of the diluted solution is ________ M.

Correct AnswerverifiedShow Answer

Match the following. -Mg(s) + Cu(NO3) 2(aq) → Mg(NO3) 2(aq) + Cu(s)

Correct AnswerverifiedShow Answer

How many milliliters of a stock solution of 11.1 M HNO3 would be needed to prepare 0.500 L of 0.500 M HNO3?

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If the percent yield for the following reaction is 65.0%,how many grams of KClO3 are needed to produce 32.0 g of O2? 2 KClO3(s) → 2 KCl(s) + 3 O2(g)

Correct AnswerverifiedShow Answer

How many moles of CH3CH2OH are contained in 548 mL of 0.0788 M CH3CH2OH solution?

Correct AnswerverifiedShow Answer

What reagent could not be used to separate Br- from CO32- when added to an aqueous solution containing both?

Correct AnswerverifiedShow Answer

What mass of N2 will be produced from the reaction of 50.0 g N2O4 with 45.0 g N2H4? N2O4(l) + 2 N2H4(l) → 3 N2(g) + 4 H2O(g)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In an acid-base neutralization reaction 38.74 mL of 0.500 M potassium hydroxide reacts with 50.00 mL of sulfuric acid solution.What is the concentration of the H2SO4 solution?

Correct AnswerverifiedShow Answer

Determine the percent yield of a reaction that produces 28.65 g of Fe when 50.00 g of Fe2O3 react with excess Al according to the following reaction. Fe2O3(s) + 2 Al(s) → Al2O3(s) + 2 Fe(s)

Correct AnswerverifiedShow Answer

5.0 g of iron is reacted with 5.0 g of water according to the chemical equation shown below.Which one of the following statements is FALSE? 3 Fe(s) + 4 H2O(l) → Fe3O4(s) + 4 H2(g)

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
verified

The titration of 25.0 mL of an unknown concentration H₂SO₄ solution requires 83.6 mL of 0.12 M LiOH solution.What is the concentration of the H₂SO₄ solution (in M) ?

Correct Answer
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Carbonic acid can form water and carbon dioxide upon heating.How much carbon dioxide is formed from 6.20 g of carbonic acid? H₂CO₃ → H₂O + CO₂

Correct Answer
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Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of Na₂CO₃ and HCl are mixed.

Correct Answer
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Determine the oxidation state of Cl in NaClO₃.

Correct Answer
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Correct Answer
verified

Correct Answer
verified
A strong electrolyte is either an ionic ...
View Answer

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

Correct Answer
verified

A stock solution of HNO₃ is prepared and found to contain 13.5 M of HNO₃.If 25.0 mL of the stock solution is diluted to a final volume of 0.500 L,the concentration of the diluted solution is ________ M.

Correct Answer
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Match the following. -Mg(s) + Cu(NO₃) ₂(aq) → Mg(NO₃) ₂(aq) + Cu(s)

Correct Answer
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How many milliliters of a stock solution of 11.1 M HNO₃ would be needed to prepare 0.500 L of 0.500 M HNO₃?

Correct Answer
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If the percent yield for the following reaction is 65.0%,how many grams of KClO₃ are needed to produce 32.0 g of O₂? 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g)

Correct Answer
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How many moles of CH₃CH₂OH are contained in 548 mL of 0.0788 M CH₃CH₂OH solution?

Correct Answer
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What reagent could not be used to separate Br^- from CO₃^2- when added to an aqueous solution containing both?

Correct Answer
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What mass of N₂ will be produced from the reaction of 50.0 g N₂O₄ with 45.0 g N₂H₄? N₂O₄(l) + 2 N₂H₄(l) → 3 N₂(g) + 4 H₂O(g)

Correct Answer
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Correct Answer
verified

In an acid-base neutralization reaction 38.74 mL of 0.500 M potassium hydroxide reacts with 50.00 mL of sulfuric acid solution.What is the concentration of the H₂SO₄ solution?

Correct Answer
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Determine the percent yield of a reaction that produces 28.65 g of Fe when 50.00 g of Fe₂O₃ react with excess Al according to the following reaction. Fe₂O₃(s) + 2 Al(s) → Al₂O₃(s) + 2 Fe(s)

Correct Answer
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5.0 g of iron is reacted with 5.0 g of water according to the chemical equation shown below.Which one of the following statements is FALSE? 3 Fe(s) + 4 H₂O(l) → Fe₃O₄(s) + 4 H₂(g)

Correct Answer
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