Question 1

A 0.00100 mol sample of Ca(OH) 2 requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl? Equation: Ca(OH) 2(s)  + 2HCl(aq)   →\rightarrow→  CaCl2(aq)  + H2O(l)

Accepted Answer

A)   0.0200 M
B)   0.0400 M
C)   0.0800 M
D)   4.00 *10¯5 M
E)   None of these choices is correct. F) D) and E)
G) B) and E)

Question 2

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the hydrogen sulfite ion, HSO3¯. MnO4¯(aq)  + HSO3¯(aq)  + H+(aq)   →\rightarrow→ Mn2+(aq)  + SO42¯(aq)  + H2O(l)

Accepted Answer

A)   1
B)   2
C)   3
D)   5
E)   10 F) B) and E)
G) All of the above

Question 3

A) Define "reduction."
B) Balance the following redox equation. $ \mathrm{HNO}_{3}(a q)+\mathrm{KI}(a q) \rightarrow \mathrm{NO}(g)+\mathrm{I}_{2}(s)+\mathrm{H}_{2} \mathrm{O}(b)+\mathrm{KNO}_{3}(a q) $

Accepted Answer

a. Reduction: gain o...

Question 4

In both of the following reactions, a precipitate is formed. Complete and balance the equations, showing the phases of the products. 
A)
B)

Accepted Answer

a. $ 2 \mathrm{AgNO}_{3}(a q)+\mathrm{CaCl}_{2}(a q) \rightarrow 2 \mathrm{AgCl}(s)+\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}(a q) $
b. $ 3 \mathrm{NaOH}(a q)+F e\left(\mathrm{NO}_{3}\right)_{3}(a q) \rightarrow \mathrm{Fe}(\mathrm{OH})_{3}(s)+3 \mathrm{NaNO}_{3}(a q) $

Question 5

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) A) and B)
G) A) and C)

Question 6

Which one of the following is not a redox reaction?

Accepted Answer

A)   2H2O2(aq)   →\rightarrow→  2H2O(l)  + O2(g) 
B)   N2(g)  + 3H2(g)   →\rightarrow→  2NH3(g) 
C)   BaCl2(aq)  + K2CrO4(aq)   →\rightarrow→ BaCrO4(aq)  + 2KCl(aq) 
D)   2Al(s)  + Fe2O3(s)   →\rightarrow→ Al2O3(s)  + 2Fe(s) 
E)   2H2O(g)   →\rightarrow→  2H2(g)  + O2(g)  F) A) and B)
G) A) and C)

Question 7

The oxidation numbers of P, S and Cl in H2PO2¯, H2S and KClO4 are, respectively

Accepted Answer

A)   -1, -1, +3
B)   +1, -2, +7
C)   +1, +2, +7
D)   -1, -2, +7
E)   -1, -2, +3F) B) and C)
G) A) and B)

Question 8

Complete and balance the equation for the following acid-base reaction.

Accepted Answer

$ \mathrm{Ca}(\mathrm{OH})_{2}(a q)+2 \mathrm{HCl}(a q) \rightarrow \mathrm{CaCl}_{2}(a q)+2 \mathrm{H}_{2} \mathrm{O}(l) $

Question 9

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the chromate anion, CrO42¯. CrO42¯(aq)  + CN¯(aq)  + H2O(l)   →\rightarrow→  CNO¯(aq)  + Cr(OH) 4¯(aq)  + OH¯(aq)

Accepted Answer

A)   1
B)   2
C)   3
D)   5
E)   6 F) B) and C)
G) A) and E)

Question 10

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) C) and D)
G) A) and B)

Question 11

Select the classification for the following reaction: H2CO3(aq)   →\rightarrow→  H2O(l)  + CO2(g)

Accepted Answer

A)   combination
B)   decomposition
C)   displacement
D)   acid-base
E)   None of these choices is correct. F) A) and B)
G) C) and E)

Question 12

Potassium carbonate, K2CO3, sodium iodide, NaI, magnesium chloride, MgCl2, 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)   MgCl2
D)   CH3OH
E)   NH4ClF) B) and C)
G) A) and E)

Question 13

Select the classification for the following reaction. 2Na(s)  + 2H2O(l)   →\rightarrow→  2NaOH(aq)  + H2(g)

Accepted Answer

A)   precipitation
B)   acid-base
C)   redox
D)   combination
E)   None of these choices is correct. F) A) and D)
G) A) and C)

Question 14

Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na5P3O10.

Accepted Answer

A)   +3
B)   +5
C)   +10
D)   +15
E)   None of these choices is correct.F) B) and D)
G) B) and C)

Question 15

Select the classification for the following reaction.

Accepted Answer

A)   combination
B)   decomposition
C)   displacement
D)   acid-base
E)   precipitationF) C) and D)
G) All of the above

Question 16

Ammonia, NH3, produces hydroxide ions in aqueous solution by

Accepted Answer

A)   donating a proton to an acid molecule.
B)   donating a proton to a water molecule.
C)   donating a hydrogen ion to a water molecule.
D)   accepting an electron from an acid molecule.
E)   accepting a proton from a water molecule.F) All of the above
G) B) and C)

Question 17

Balance the redox equation $ \mathrm{HNO}_{3}(a q)+\mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O}(a q)+\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}(a q) \rightarrow $
$ \mathrm{KNO}_{3}(a q)+\mathrm{C}_{2} \mathrm{H}_{4} \mathrm{O}(a q)+\mathrm{H}_{2} \mathrm{O}(l)+\mathrm{Cr}\left(\mathrm{NO}_{3}\right)_{3}(a q) $

Accepted Answer

The answer of Balance the redox equation \( \mathrm{HNO}_{3}(a q)+\mathrm{C}_{2}...

Question 18

Which one of the following is not a redox reaction?

Accepted Answer

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

Question 19

Which of the statements below correctly describes the combustion of glucose, shown below? C6H12O6 + 6O2  →\rightarrow→ 6CO2 + 6H2O

Accepted Answer

A)   Hydrogen in C6H12O6 is being reduced.
B)   Oxygen in O2 is being oxidized.
C)   Hydrogen in C6H12O6 is the reducing agent.
D)   Oxygen in C6H12O6 is the oxidizing agent.
E)   Carbon in C6H12O6 is being oxidized. F) A) and D)
G) B) and D) E

Question 20

Which of the following is a strong acid?

Accepted Answer

A)   H3PO4
B)   HNO3
C)   HF
D)   CH3COOH
E)   H2OF) A) and D)
G) C) and D)

Exam 4: Three Major Classes of Chemical Reactions

A 0.00100 mol sample of Ca(OH) ₂ requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl? Equation: Ca(OH) ₂(s) + 2HCl(aq) $\rightarrow$ CaCl₂(aq) + H₂O(l)

Correct Answer
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Balance the following redox equation using the smallest integers possible and select the correct coefficient for the hydrogen sulfite ion, HSO₃^¯. MnO₄^¯(aq) + HSO₃^¯(aq) + H⁺(aq) $\rightarrow$ Mn²⁺(aq) + SO₄^2¯(aq) + H₂O(l)

Correct Answer
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A) Define "reduction." B) Balance the following redox equation. $\mathrm{HNO}_{3}(a q)+\mathrm{KI}(a q) \rightarrow \mathrm{NO}(g)+\mathrm{I}_{2}(s)+\mathrm{H}_{2} \mathrm{O}(b)+\mathrm{KNO}_{3}(a q)$

Correct Answer
verified
a. Reduction: gain o...
View Answer

In both of the following reactions, a precipitate is formed. Complete and balance the equations, showing the phases of the products. A) B)

Correct Answer
verified
a. \( 2 \mathrm{AgNO}_{3}(a q)+\mathrm{CaCl}_{2}(a q) \rightarrow 2 \mathrm{AgCl}(s)+\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}(a q) \) b. \( 3 \mathrm{NaOH}(a q)+F e\left(\mathrm{NO}_{3}\right)_{3}(a q) \rightarrow \mathrm{Fe}(\mathrm{OH})_{3}(s)+3 \mathrm{NaNO}_{3}(a q) \)

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

Correct Answer
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Which one of the following is not a redox reaction?

Correct Answer
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The oxidation numbers of P, S and Cl in H₂PO₂^¯, H₂S and KClO₄ are, respectively

Correct Answer
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Complete and balance the equation for the following acid-base reaction.

Correct Answer
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\( \mathrm{Ca}(\mathrm{OH})_{2}(a q)+2 \mathrm{HCl}(a q) \rightarrow \mathrm{CaCl}_{2}(a q)+2 \mathrm{H}_{2} \mathrm{O}(l) \)

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the chromate anion, CrO₄^2¯. CrO₄^2¯(aq) + CN^¯(aq) + H₂O(l) $\rightarrow$ CNO^¯(aq) + Cr(OH) ₄^¯(aq) + OH^¯(aq)

Correct Answer
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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
verified

Select the classification for the following reaction: H₂CO₃(aq) $\rightarrow$ H₂O(l) + CO₂(g)

Correct Answer
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Potassium carbonate, K₂CO₃, sodium iodide, NaI, magnesium chloride, MgCl₂, 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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Select the classification for the following reaction. 2Na(s) + 2H₂O(l) $\rightarrow$ 2NaOH(aq) + H₂(g)

Correct Answer
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Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na₅P₃O₁₀.

Correct Answer
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Select the classification for the following reaction.

Correct Answer
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Ammonia, NH₃, produces hydroxide ions in aqueous solution by

Correct Answer
verified

Correct Answer
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Which one of the following is not a redox reaction?

Correct Answer
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Which of the statements below correctly describes the combustion of glucose, shown below? C₆H₁₂O₆ + 6O₂ $\rightarrow$ 6CO₂ + 6H₂O

Correct Answer
verified
E

Which of the following is a strong acid?

Correct Answer
verified

Exam 4: Three Major Classes of Chemical Reactions

A 0.00100 mol sample of Ca(OH) 2 requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl? Equation: Ca(OH) 2(s) + 2HCl(aq) →\rightarrow→ CaCl2(aq) + H2O(l)

Correct AnswerverifiedShow Answer

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the hydrogen sulfite ion, HSO3¯. MnO4¯(aq) + HSO3¯(aq) + H+(aq) →\rightarrow→ Mn2+(aq) + SO42¯(aq) + H2O(l)

Correct AnswerverifiedShow Answer

Correct Answerverifieda. Reduction: gain o...View AnswerShow Answer

In both of the following reactions, a precipitate is formed. Complete and balance the equations, showing the phases of the products. A) B)

Correct Answerverifieda. \( 2 \mathrm{AgNO}_{3}(a q)+\mathrm{CaCl}_{2}(a q) \rightarrow 2 \mathrm{AgCl}(s)+\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}(a q) \) b. \( 3 \mathrm{NaOH}(a q)+F e\left(\mathrm{NO}_{3}\right)_{3}(a q) \rightarrow \mathrm{Fe}(\mathrm{OH})_{3}(s)+3 \mathrm{NaNO}_{3}(a q) \)

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

Correct AnswerverifiedShow Answer

Which one of the following is not a redox reaction?

Correct AnswerverifiedShow Answer

The oxidation numbers of P, S and Cl in H2PO2¯, H2S and KClO4 are, respectively

Correct AnswerverifiedShow Answer

Complete and balance the equation for the following acid-base reaction.

Correct Answerverified\( \mathrm{Ca}(\mathrm{OH})_{2}(a q)+2 \mathrm{HCl}(a q) \rightarrow \mathrm{CaCl}_{2}(a q)+2 \mathrm{H}_{2} \mathrm{O}(l) \)

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the chromate anion, CrO42¯. CrO42¯(aq) + CN¯(aq) + H2O(l) →\rightarrow→ CNO¯(aq) + Cr(OH) 4¯(aq) + OH¯(aq)

Correct AnswerverifiedShow Answer

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

Select the classification for the following reaction: H2CO3(aq) →\rightarrow→ H2O(l) + CO2(g)

Correct AnswerverifiedShow Answer

Potassium carbonate, K2CO3, sodium iodide, NaI, magnesium chloride, MgCl2, 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

Select the classification for the following reaction. 2Na(s) + 2H2O(l) →\rightarrow→ 2NaOH(aq) + H2(g)

Correct AnswerverifiedShow Answer

Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na5P3O10.

Correct AnswerverifiedShow Answer

Select the classification for the following reaction.

Correct AnswerverifiedShow Answer

Ammonia, NH3, produces hydroxide ions in aqueous solution by

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which one of the following is not a redox reaction?

Correct AnswerverifiedShow Answer

Which of the statements below correctly describes the combustion of glucose, shown below? C6H12O6 + 6O2 →\rightarrow→ 6CO2 + 6H2O

Correct AnswerverifiedE

Which of the following is a strong acid?

Correct AnswerverifiedShow Answer

A 0.00100 mol sample of Ca(OH) ₂ requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl? Equation: Ca(OH) ₂(s) + 2HCl(aq) $\rightarrow$ CaCl₂(aq) + H₂O(l)

Correct Answer
verified

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the hydrogen sulfite ion, HSO₃^¯. MnO₄^¯(aq) + HSO₃^¯(aq) + H⁺(aq) $\rightarrow$ Mn²⁺(aq) + SO₄^2¯(aq) + H₂O(l)

Correct Answer
verified

Correct Answer
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a. Reduction: gain o...
View Answer

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

Correct Answer
verified

Correct Answer
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The oxidation numbers of P, S and Cl in H₂PO₂^¯, H₂S and KClO₄ are, respectively

Correct Answer
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Correct Answer
verified
\( \mathrm{Ca}(\mathrm{OH})_{2}(a q)+2 \mathrm{HCl}(a q) \rightarrow \mathrm{CaCl}_{2}(a q)+2 \mathrm{H}_{2} \mathrm{O}(l) \)

Balance the following redox equation using the smallest integers possible and select the correct coefficient for the chromate anion, CrO₄^2¯. CrO₄^2¯(aq) + CN^¯(aq) + H₂O(l) $\rightarrow$ CNO^¯(aq) + Cr(OH) ₄^¯(aq) + OH^¯(aq)

Correct Answer
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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
verified

Select the classification for the following reaction: H₂CO₃(aq) $\rightarrow$ H₂O(l) + CO₂(g)

Correct Answer
verified

Potassium carbonate, K₂CO₃, sodium iodide, NaI, magnesium chloride, MgCl₂, 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
verified

Select the classification for the following reaction. 2Na(s) + 2H₂O(l) $\rightarrow$ 2NaOH(aq) + H₂(g)

Correct Answer
verified

Sodium tripolyphosphate is used in detergents to make them effective in hard water. Calculate the oxidation number of phosphorus in Na₅P₃O₁₀.

Correct Answer
verified

Correct Answer
verified

Ammonia, NH₃, produces hydroxide ions in aqueous solution by

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Which of the statements below correctly describes the combustion of glucose, shown below? C₆H₁₂O₆ + 6O₂ $\rightarrow$ 6CO₂ + 6H₂O

Correct Answer
verified
E

Correct Answer
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