Question 1

Which one of the following is not a redox reaction?

Accepted Answer

A)   2H2(g)  + O2(g)  → 2H2O(l) 
B)   Zn(s)  + H2SO4(aq)  → ZnSO4(aq)  + H2(g) 
C)   H2O(l)  + NH3(g)  → NH4+(aq)  + OH-(aq) 
D)   6FeSO4(aq)  + K2Cr2O7(aq)  + 7H2SO4(aq)  → Cr2(SO4) 3(aq)  + 3Fe2(SO4) 3(aq)  + K2SO4(aq)  + 7H2O(l) 
E)   Cl2(g)  + 2KBr(aq)  → Br2(l)  + 2KCl(aq) F) D) and E)
G) A) and C)

Question 2

Calculate the molarity of a 23.55-mL solution which contains 28.24 mg of sodium sulfate (used in dyeing and printing textiles,  = 139.04 g/mol) .

Accepted Answer

A)   8.625 M
B)   1.199 M
C)   0.8339 M
D)   0.2031 M
E)   0.008625 MF) B) and E)
G) A) and B)

Question 3

How many sodium ions are present in 325 mL of 0.850 M Na2SO4?

Accepted Answer

A)   1.66 × 1023 sodium ions
B)   3.33 × 1023 sodium ions
C)   4.99 × 1023 sodium ions
D)   6.20 × 1023 sodium ions
E)   1.57 × 1024 sodium ionsF) A) and B)
G) A) and E)

Question 4

Select the correct set of products for the following reaction. Ba(OH) 2(aq)  + HNO3(aq)  →

Accepted Answer

A)   BaN2(s)  + H2O(l) 
B)   Ba(NO3) 2(aq)  + H2O(l) 
C)   Ba(s)  + H2(g)  + NO2(g) 
D)   Ba2O(s)  + NO2(g)  + H2O(l) 
E)   No reaction occurs.F) A) and B)
G) B) and E)

Question 5

Select the best statement relating to the following reaction: 2MnO2(s)  + KClO3(aq)  + 2KOH(aq)  → 2KMnO4(aq)  + KCl(aq)  + H2O(l)

Accepted Answer

A)   Mn in MnO2 is oxidized.
B)   O in KClO3 is the oxidizing agent.
C)   K in KClO3 is the reducing agent.
D)   H in KOH is oxidized.
E)   Cl in KClO3 is the reducing agent.F) A) and C)
G) A) and E)

Question 6

Potassium chloride, KCl, sodium sulfate, Na2SO4, glucose, C6H12O6, carbon dioxide, CO2 and ammonium phosphate, (NH4) 3PO4, are soluble in water. Which one produces the largest number of dissolved particles per mole of dissolved solute?

Accepted Answer

A)   KCI
B)   Na2SO4
C)   C6H12O6
D)   CO2
E)   (NH4) 3PO4F) B) and E)
G) A) and D)

Question 7

Hydrochloric acid is widely used as a laboratory reagent in refining ore for the production of tin and tantalum, and as a catalyst in organic reactions. Calculate the number of moles of HCl in 62.85 mL of 0.453 M hydrochloric acid.

Accepted Answer

A)   28.5 mol
B)   1.04 mol
C)   0.139 mol
D)   0.0285 mol
E)   0.00721 molF) B) and C)
G) C) and D)

Question 8

Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in 1.875 L of 1.356 M NaOH solution.

Accepted Answer

A)   2.543 mol
B)   1.383 mol
C)   0.7232 mol
D)   0.3932 mol
E)   0.001383 molF) A) and B)
G) None of the above

Question 9

During a titration, the following data were collected. A 25 mL portion of an unknown acid solution was titrated with 1.0 M NaOH. It required 65 mL of the base to neutralize the sample. How many moles of acid are present in 3.0 liters of this unknown solution?

Accepted Answer

A)   2.6 moles
B)   0.9 moles
C)   8.7 moles
D)   7.8 moles
E)   5.6 molesF) A) and B)
G) B) and C)

Question 10

Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H2SO4(aq)  + 2NaOH(aq)  → 2H2O(l)  + Na2SO4(aq)

Accepted Answer

A)   0.045 L
B)   0.28 L
C)   0.56 L
D)   0.90 L
E)   1.1 LF) A) and B)
G) None of the above

Question 11

Which one of the following substances is the best electrolyte?

Accepted Answer

A)   CO
B)   CH3Cl
C)   CH4
D)   C2H5OH
E)   HClF) All of the above
G) A) and E)

Question 12

Which of the following is most soluble in water?

Accepted Answer

A)   benzene, C6H6
B)   potassium nitrate, KNO3
C)   carbon tetrachloride, CCl4
D)   hexane, C6H14
E)   ethane, C2H4F) B) and E)
G) None of the above

Question 13

How many mL of concentrated nitric acid (HNO3, 16.0 M)  should be diluted with water in order to make 2.00 L of 2.00 M solution?

Accepted Answer

A)   32.0 mL
B)   62.5 mL
C)   125 mL
D)   250. mL
E)   500. mLF) B) and D)
G) All of the above

Question 14

Vinegar is a solution of acetic acid, CH3COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Accepted Answer

A)   0.184%
B)   1.63%
C)   3.26%
D)   5.43%
E)   9.23%F) A) and B)
G) C) and E)

Question 15

Select the classification for the following reaction. 2NaCl(l)  2(g)  A)  Acid-base B)  Precipitation C)  Combination D)  Displacement E)  Decomposition" class="answers-bank-image d-inline" rel="preload" > 2Na(l)  + Cl2(g)

Accepted Answer

A)   Acid-base
B)   Precipitation
C)   Combination
D)   Displacement
E)   DecompositionF) C) and E)
G) B) and C)

Question 16

Which one of the following is not a redox reaction?

Accepted Answer

A)   2Na(s)  + 2H2O(l)  → 2NaOH(aq)  + H2(g) 
B)   H2(g)  + Cl2(g)  → 2HCl(g) 
C)   2H2O2(aq)  → 2H2O(l)  + O2(g) 
D)   Fe2O3(s)  + 3H2SO4(aq)  → Fe2(SO4) 3(aq)  + 3H2O(l) 
E)   2KMnO4(aq)  + 10FeSO4(aq)  + 8H2SO4(aq)  → K2SO4(aq)  + 2MnSO4(aq)  + 5Fe2(SO4) 3(aq)  + 8H2O(l) F) B) and E)
G) D) and E)

Question 17

How many moles of H+(aq)  ions are present in 1.25 L of 0.75 M nitric acid?

Accepted Answer

A)   0.60 mol
B)   0.75 mol
C)   0.94 mol
D)   1.7 mol
E)   1.9 molF) None of the above
G) A) and B)

Question 18

Potassium carbonate, K2CO3, sodium iodide, NaI, potassium bromide, KBr, methanol, CH3OH, and ammonium chloride, NH4Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

Accepted Answer

A)   K2CO3
B)   NaI
C)   KBr
D)   CH3OH
E)   NH4ClF) A) and B)
G) A) and C)

Question 19

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH4) 3PO4, is dissolved in water?

Accepted Answer

A)   0.40 mol
B)   1.6 mol
C)   3.2 mol
D)   4.8 mol
E)   6.4 molF) A) and D)
G) A) and B)

Question 20

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

Accepted Answer

A)   CaCl2
B)   HNO3
C)   NH3
D)   C6H12O6 (glucose) 
E)   CO2F) B) and C)
G) B) and D)

Exam 4: Three Major Classes of Chemical Reactions

Select the best statement relating to the following reaction: 2MnO2(s) + KClO3(aq) + 2KOH(aq) → 2KMnO4(aq) + KCl(aq) + H2O(l)

Correct AnswerverifiedShow Answer

Calculate the molarity of a 23.55-mL solution which contains 28.24 mg of sodium sulfate (used in dyeing and printing textiles, = 139.04 g/mol) .

Correct AnswerverifiedShow Answer

Which one of the following substances is the best electrolyte?

Correct AnswerverifiedShow Answer

During a titration, the following data were collected. A 25 mL portion of an unknown acid solution was titrated with 1.0 M NaOH. It required 65 mL of the base to neutralize the sample. How many moles of acid are present in 3.0 liters of this unknown solution?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which one of the following is not a redox reaction?

Correct AnswerverifiedShow Answer

Hydrochloric acid is widely used as a laboratory reagent in refining ore for the production of tin and tantalum, and as a catalyst in organic reactions. Calculate the number of moles of HCl in 62.85 mL of 0.453 M hydrochloric acid.

Correct AnswerverifiedShow Answer

How many moles of H+(aq) ions are present in 1.25 L of 0.75 M nitric acid?

Correct AnswerverifiedShow Answer

Select the classification for the following reaction. 2NaCl(l) 2Na(l) + Cl2(g)

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Select the correct set of products for the following reaction. Ba(OH) 2(aq) + HNO3(aq) →

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Potassium carbonate, K2CO3, sodium iodide, NaI, potassium bromide, KBr, methanol, CH3OH, and ammonium chloride, NH4Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

Correct AnswerverifiedShow Answer

How many sodium ions are present in 325 mL of 0.850 M Na2SO4?

Correct AnswerverifiedShow Answer

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH4) 3PO4, is dissolved in water?

Correct AnswerverifiedShow Answer

Potassium chloride, KCl, sodium sulfate, Na2SO4, glucose, C6H12O6, carbon dioxide, CO2 and ammonium phosphate, (NH4) 3PO4, are soluble in water. Which one produces the largest number of dissolved particles per mole of dissolved solute?

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Which one of the following is not a redox reaction?

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Which of the following is most soluble in water?

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Vinegar is a solution of acetic acid, CH3COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Correct AnswerverifiedShow Answer

Sodium hydroxide, also known as caustic soda, is used to neutralize acids and to treat cellulose in making of cellophane. Calculate the number of moles of solute in 1.875 L of 1.356 M NaOH solution.

Correct AnswerverifiedShow Answer

Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H2SO4(aq) + 2NaOH(aq) → 2H2O(l) + Na2SO4(aq)

Correct AnswerverifiedShow Answer

How many mL of concentrated nitric acid (HNO3, 16.0 M) should be diluted with water in order to make 2.00 L of 2.00 M solution?

Correct AnswerverifiedShow Answer

Select the best statement relating to the following reaction: 2MnO₂(s) + KClO₃(aq) + 2KOH(aq) → 2KMnO₄(aq) + KCl(aq) + H₂O(l)

Correct Answer
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Select the classification for the following reaction. 2NaCl(l) 2Na(l) + Cl₂(g)

Correct Answer
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Select the correct set of products for the following reaction. Ba(OH) ₂(aq) + HNO₃(aq) →

Correct Answer
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Potassium carbonate, K₂CO₃, sodium iodide, NaI, potassium bromide, KBr, methanol, CH₃OH, and ammonium chloride, NH₄Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

Correct Answer
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How many sodium ions are present in 325 mL of 0.850 M Na₂SO₄?

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How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH₄) ₃PO₄, is dissolved in water?

Correct Answer
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Potassium chloride, KCl, sodium sulfate, Na₂SO₄, glucose, C₆H₁₂O₆, carbon dioxide, CO₂ and ammonium phosphate, (NH₄) ₃PO₄, are soluble in water. Which one produces the largest number of dissolved particles per mole of dissolved solute?

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Vinegar is a solution of acetic acid, CH₃COOH, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. What is the percent by weight of acetic acid in the vinegar?

Correct Answer
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Correct Answer
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Automobile batteries use 3.0 M H₂SO₄ as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H₂SO₄(aq) + 2NaOH(aq) → 2H₂O(l) + Na₂SO₄(aq)

Correct Answer
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How many mL of concentrated nitric acid (HNO₃, 16.0 M) should be diluted with water in order to make 2.00 L of 2.00 M solution?

Correct Answer
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