Question 1

What is the pH of a 0.056 M HNO3 solution?

Accepted Answer

A)   0.056
B)   1.25
C)   12.75
D)   2.88
E)   11.11F) A) and E)
G) A) and B)

Question 2

Which element is reduced in the following reaction? Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O

Accepted Answer

A)   Cu
B)   H
C)   S
D)   O
E)   H2OF) A) and E)
G) A) and C)

Question 3

Suppose a large piece of a metallic solid, A(s) , is placed in a beaker containing the metallic cation Z2+(aq) , as depicted below. 2+(aq) , as depicted below.   If Z is a more active metal than A, which is a possible representation of the final reaction mixture?   A)  I only B)  II only C)  III only D)  I or II E)  II or III" class="answers-bank-image d-inline" rel="preload" > If Z is a more active metal than A, which is a possible representation of the final reaction mixture? 2+(aq) , as depicted below.   If Z is a more active metal than A, which is a possible representation of the final reaction mixture?   A)  I only B)  II only C)  III only D)  I or II E)  II or III" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   I only
B)   II only
C)   III only
D)   I or II
E)   II or IIIF) A) and B)
G) A) and C)

Question 4

Identify the element being oxidized in the following reaction.
4Al + 3O2 → 2Al2O3

Accepted Answer

Question 5

In each of the following cases, write down the oxidation number of the indicated atom.
a. P in P4
b. C in C2H6
c. S in H2SO4
d. Mn in MnO4-
e. P in Na3PO4

Accepted Answer

a = 0, b =...

Question 6

What mass of lithium phosphate is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.125 M?

Accepted Answer

A)   2.41 g
B)   7.24 g
C)   14.5 g
D)   21.7 g
E)   43.4 gF) A) and D)
G) B) and D)

Question 7

A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid in the original solution?

Accepted Answer

A)   0.243 M
B)   0.200 M
C)   1.13 M
D)   0.563 M
E)   0.0313 MF) B) and D)
G) A) and B)

Question 8

For the reaction depicted below, if Z represents Zn, which metal could A represent?

Accepted Answer

A)   Al
B)   Na
C)   Pb
D)   Ca
E)   CuF) B) and D)
G) A) and E)

Question 9

What is the oxidizing agent in the following reaction? 5Fe2+(aq)  + MnO4-(aq)  + 8H+(aq)  → 5Fe3+(aq)  + Mn2+(aq)  + 4H2O(l)

Accepted Answer

A)   Fe2+
B)   MnO4-
C)   H+
D)   Mn2+
E)   Fe3+F) A) and C)
G) B) and E)

Question 10

What is reduced in the following reaction? Cu(NO3) 2 + Zn → Zn(NO3) 2 + Cu

Accepted Answer

A)   Cu(NO3) 2
B)   N
C)   O
D)   Zn
E)   NO3F) D) and E)
G) A) and B)

Question 11

Based on the solubility rules, which one of these compounds is soluble in water?

Accepted Answer

A)   AgBr
B)   AgCl
C)   Ag2CO3
D)   AgNO3
E)   Ag2SF) A) and E)
G) D) and E)

Question 12

Which of the following is insoluble in water?

Accepted Answer

A)   Li2CO3
B)   NaOH
C)   PbCl2
D)   Ba(OH) 2
E)   (NH4) 2SF) D) and E)
G) All of the above

Question 13

Which chemical equation describes an acid-base neutralization reaction?

Accepted Answer

A)   2Al(s) + 3H2SO4(aq)  → Al2 (SO4) 3 (aq)  + 3H2(g) 
B)   2SO2(g)  + 2H2O(l)  + O2(g)  → 2H2SO4(aq) 
C)   LiOH(aq)  + HNO3(aq)  → LiNO3(aq)  + H2O(l) 
D)   2KBr(aq)  + Cl2(g)  → 2KCl(aq)  + Br2(aq) 
E)   CaBr2(aq)  + H2SO4(aq)  → CaSO4(s)  + 2HBr(aq) F) All of the above
G) B) and E)

Question 14

What is the oxidation number of N in K3Fe(CN) 6?

Accepted Answer

A)   +3
B)   -3
C)   +4
D)   -5
E)   +1F) A) and E)
G) C) and D)

Question 15

35.0 mL of 0.255 M nitric acid is added to 45.0 mL of 0.328 M Mg(NO3) 2. What is the concentration of nitrate ion in the final solution?

Accepted Answer

A)   0.296 M
B)   0.481 M
C)   0.583 M
D)   0.911 M
E)   0.148 MF) A) and B)
G) A) and E)

Question 16

What is the net ionic equation if sodium sulfate is mixed with barium hydroxide?

Accepted Answer

A)   2Na+(aq)  + SO42-(aq)  → Na2SO4(s) 
B)   Na+(aq)  + OH-(aq)  → NaOH(s) 
C)   2Ba+(aq)  + SO42- (aq)  → Ba2SO4(s) 
D)   Ba2+(aq)  + SO42- (aq)  → BaSO4(s) 
E)   Ba2+(aq)  + 2OH-(aq)  → Ba(OH) 2(s) F) C) and E)
G) A) and D)

Question 17

Which of the following is a strong acid?

Accepted Answer

A)   H3PO4
B)   HNO3
C)   HF
D)   CH3COOH
E)   H2OF) B) and C)
G) All of the above

Question 18

Which represents the result of mixing equal volumes of 1 M aluminum chloride, 2 M magnesium chloride, and 1 M potassium chloride solution? (Each sphere represents 1 mol of ions.)

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and E)
G) D) and E)

Question 19

Complete the following reaction and identify the Brønsted acid. NaOH(aq)  + HCl(aq)  →

Accepted Answer

A)   NaH(aq)  + HOCl(aq) ; NaOH is the acid.
B)   NaH(aq)  + HOCl(aq) ; HCl is the acid.
C)   NaCl(aq)  + H2O(l) ; NaOH is the acid.
D)   NaCl(aq)  + H2O(l) ; HCl is the acid.
E)   NaCl(aq)  + H2O(l) ; NaCl is the acid.F) D) and E)
G) A) and D)

Question 20

Which chemical equation describes a combustion reaction?

Accepted Answer

A)   2C2H6(g)  + 7O2(g)  → 4CO2(g)  + 6H2O(l) 
B)   LiOH(aq)  + HNO3(aq)  → LiNO3(aq)  + H2O(l) 
C)   N2(g)  + 3H2(g)  → 2NH3(g) 
D)   2Na(s)  + 2H2O(l)  → 2NaOH(aq)  + H2(g) 
E)   2Al(s)  + 3H2SO4(aq)  → Al2(SO4) 3(aq)  + 3H2(g) F) B) and E)
G) A) and B)

Exam 4: Reactions in Aqueous Solutions

A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid in the original solution?

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Which element is reduced in the following reaction? Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O

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What is reduced in the following reaction? Cu(NO3) 2 + Zn → Zn(NO3) 2 + Cu

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What is the net ionic equation if sodium sulfate is mixed with barium hydroxide?

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Which of the following is a strong acid?

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What mass of lithium phosphate is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.125 M?

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Suppose a large piece of a metallic solid, A(s) , is placed in a beaker containing the metallic cation Z2+(aq) , as depicted below. If Z is a more active metal than A, which is a possible representation of the final reaction mixture?

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Based on the solubility rules, which one of these compounds is soluble in water?

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In each of the following cases, write down the oxidation number of the indicated atom. a. P in P4 b. C in C2H6 c. S in H2SO4 d. Mn in MnO4- e. P in Na3PO4

Correct Answerverifieda = 0, b =...View AnswerShow Answer

Identify the element being oxidized in the following reaction. 4Al + 3O2 → 2Al2O3

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For the reaction depicted below, if Z represents Zn, which metal could A represent?

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Which chemical equation describes a combustion reaction?

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Which of the following is insoluble in water?

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What is the oxidizing agent in the following reaction? 5Fe2+(aq) + MnO4-(aq) + 8H+(aq) → 5Fe3+(aq) + Mn2+(aq) + 4H2O(l)

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35.0 mL of 0.255 M nitric acid is added to 45.0 mL of 0.328 M Mg(NO3) 2. What is the concentration of nitrate ion in the final solution?

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Complete the following reaction and identify the Brønsted acid. NaOH(aq) + HCl(aq) →

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Which represents the result of mixing equal volumes of 1 M aluminum chloride, 2 M magnesium chloride, and 1 M potassium chloride solution? (Each sphere represents 1 mol of ions.)

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Which chemical equation describes an acid-base neutralization reaction?

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What is the pH of a 0.056 M HNO3 solution?

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What is the oxidation number of N in K3Fe(CN) 6?

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Which element is reduced in the following reaction? Cu + 2H₂SO₄→ CuSO₄ + SO₂ + 2H₂O

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What is reduced in the following reaction? Cu(NO₃) ₂ + Zn → Zn(NO₃) ₂ + Cu

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Suppose a large piece of a metallic solid, A(s) , is placed in a beaker containing the metallic cation Z²⁺(aq) , as depicted below. If Z is a more active metal than A, which is a possible representation of the final reaction mixture?

Correct Answer
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In each of the following cases, write down the oxidation number of the indicated atom. a. P in P₄ b. C in C₂H₆ c. S in H₂SO₄ d. Mn in MnO₄^- e. P in Na₃PO₄

Correct Answer
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a = 0, b =...
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Identify the element being oxidized in the following reaction. 4Al + 3O₂→ 2Al₂O₃

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What is the oxidizing agent in the following reaction? 5Fe²⁺(aq) + MnO₄^-(aq) + 8H⁺(aq) → 5Fe³⁺(aq) + Mn²⁺(aq) + 4H₂O(l)

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35.0 mL of 0.255 M nitric acid is added to 45.0 mL of 0.328 M Mg(NO₃) ₂. What is the concentration of nitrate ion in the final solution?

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What is the pH of a 0.056 M HNO₃ solution?

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What is the oxidation number of N in K₃Fe(CN) ₆?

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