Question 1

What is the molarity of a solution that contains 5.0 moles of solute in 2.00 liters of solution?

Accepted Answer

The answer of What is the molarity of a solution...

Question 2

Describe the procedure used to make 3.0 liters of a 2.0 M KCl solution, starting with solid KCl and water.

Accepted Answer

Determine the molar mass of KC

Question 3

The oxidation number of iodine increases by 6 in the following reaction.
2MnO4- + I- + H2O $\rarr$ 2MnO2 + IO3- + 2OH-

Accepted Answer

A) True 
 B)False

Question 4

Identify the major ionic species present in an aqueous solution of C12H22O11 (sucrose).

Accepted Answer

A) 12 C-, 22 H+, 11 O- 
B) 12 C+, 22 H+, 11 O2- 
C) 12 CH2+, 11 O2- 
D) C12+, 22 H+, 11 O2- 
E) no ions are present 
A) 12 C-, 22 H+, 11 O- 
B) 12 C+, 22 H+, 11 O2- 
C) 12 CH2+, 11 O2- 
D) C12+, 22 H+, 11 O2- 
E) no ions are present

Question 5

What mass of Na2SO4 is needed to prepare 350.mL of a solution having a sodium ion concentration of 0.125 M?

Accepted Answer

A) 3.11 g 
B) 24.9 g 
C) 12.4 g 
D) 6.21 g 
E) 8.88 g 
A) 3.11 g 
B) 24.9 g 
C) 12.4 g 
D) 6.21 g 
E) 8.88 g

Question 6

Define the terms solution, solute, and solvent.

Accepted Answer

A solution is a homogeneous mi

Question 7

What volume (mL)of a 0.2450 M KOH(aq)solution is required to completely neutralize 55.25 mL of a 0.5440 M H3PO4(aq)solution?

Accepted Answer

A) 30.06 mL 
B) 165.8 mL 
C) 90.17 mL 
D) 22.09 mL 
E) 368.0 mL 
A) 30.06 mL 
B) 165.8 mL 
C) 90.17 mL 
D) 22.09 mL 
E) 368.0 mL

Question 8

Predict the products of the following single replacement reaction.
 Zn(s)+ CoCl2(aq)$\rarr$

Accepted Answer

A) No reaction occurs 
B) Co(s)+ ZnCl2(aq) 
C) CoCl(aq)+ ZnCl(aq) 
D) ZnCo(aq)+ Cl2(g) 
E) ZnCoCl2(aq) 
A) No reaction occurs 
B) Co(s)+ ZnCl2(aq) 
C) CoCl(aq)+ ZnCl(aq) 
D) ZnCo(aq)+ Cl2(g) 
E) ZnCoCl2(aq)

Question 9

Identify the precipitate(s)formed when solutions of NH4Cl(aq), AgClO3(aq), and NaCl(aq)are mixed.

Accepted Answer

A) AgCl 
B) AgCl and NH4ClO3 
C) NH4Cl and NaClO3 
D) NH4ClO3 
E) AgNH4 
A) AgCl 
B) AgCl and NH4ClO3 
C) NH4Cl and NaClO3 
D) NH4ClO3 
E) AgNH4

Question 10

How many total electrons are transferred in the following reaction? 
4 P(s)+ 5O2(g)$\rarr$2P2O5(s)

Accepted Answer

A) 5 
B) 10 
C) 15 
D) 20 
E) 25 
A) 5 
B) 10 
C) 15 
D) 20 
E) 25

Question 11

What mass of K2CO3 is needed to prepare 200.mL of a solution having a potassium ion concentration of 0.150 M?

Accepted Answer

A) 4.15 g 
B) 10.4 g 
C) 13.8 g 
D) 2.07 g 
E) 1.49 g 
A) 4.15 g 
B) 10.4 g 
C) 13.8 g 
D) 2.07 g 
E) 1.49 g

Question 12

Which of the following compounds is a nonelectrolyte?

Accepted Answer

A) NaOH 
B) HNO3 
C) C2H6O (ethanol) 
D) KF 
E) CH3COOH (acetic acid) 
A) NaOH 
B) HNO3 
C) C2H6O (ethanol) 
D) KF 
E) CH3COOH (acetic acid)

Question 13

Based on the solubility rules, which of the following should be soluble in water?

Accepted Answer

A) CaSO4 
B) BaSO4 
C) PbSO4 
D) K2SO4 
E) AgCl 
A) CaSO4 
B) BaSO4 
C) PbSO4 
D) K2SO4 
E) AgCl

Question 14

A piece of copper metal was added to an aqueous solution of silver nitrate, and within a few minutes it was observed that a grey crystalline solid formed on surface of the copper.The solution turned a blue color characteristic of copper(II)ions.Write the balanced chemical equation for this reaction.

Accepted Answer

Cu(s)+ 2Ag

Question 15

The oxidation number of Mn in KMnO4 is

Accepted Answer

A) +8 
B) +7 
C) +5 
D) -7 
E) -8 
A) +8 
B) +7 
C) +5 
D) -7 
E) -8

Question 16

Identify the Brønsted acid in the following reaction.
NH3 + H2O $\rarr$NH4+ + OH-

Accepted Answer

Question 17

Which substance is acting as a Brønsted acid in the following reaction?
HSO4- + NH4+ $\rarr$H2SO4 + NH3

Accepted Answer

Question 18

Which of the following compounds is a strong acid?

Accepted Answer

A) HF 
B) HI 
C) HClO2 
D) H2SO3 
E) HNO2 
A) HF 
B) HI 
C) HClO2 
D) H2SO3 
E) HNO2

Question 19

The reaction below can be classified as which type of reaction ? 
2 NO2(g)+ H2O(l)$\rarr$HNO2(aq)+ HNO3(aq)

Accepted Answer

A) Combination reaction 
B) Acid-base neutralization reaction 
C) Hydrogen displacement reaction 
D) Disproportionation reaction 
E) Combustion reaction 
A) Combination reaction 
B) Acid-base neutralization reaction 
C) Hydrogen displacement reaction 
D) Disproportionation reaction 
E) Combustion reaction

Question 20

Which of the following compounds is a weak electrolyte?

Accepted Answer

A) HCl 
B) NH3 
C) C6H12O6 (glucose) 
D) N2 
E) KCl 
A) HCl 
B) NH3 
C) C6H12O6 (glucose) 
D) N2 
E) KCl

Exam 4: Reactions in Aqueous Solutions

What is the molarity of a solution that contains 5.0 moles of solute in 2.00 liters of solution?

Describe the procedure used to make 3.0 liters of a 2.0 M KCl solution, starting with solid KCl and water.

The oxidation number of iodine increases by 6 in the following reaction. 2MnO4- + I- + H2O →\rarr→ 2MnO2 + IO3- + 2OH-

Identify the major ionic species present in an aqueous solution of C12H22O11 (sucrose).

What mass of Na2SO4 is needed to prepare 350.mL of a solution having a sodium ion concentration of 0.125 M?

Define the terms solution, solute, and solvent.

What volume (mL)of a 0.2450 M KOH(aq)solution is required to completely neutralize 55.25 mL of a 0.5440 M H3PO4(aq)solution?

Predict the products of the following single replacement reaction. Zn(s)+ CoCl2(aq) →\rarr→

Identify the precipitate(s)formed when solutions of NH4Cl(aq), AgClO3(aq), and NaCl(aq)are mixed.

How many total electrons are transferred in the following reaction? 4 P(s)+ 5O2(g) →\rarr→ 2P2O5(s)

What mass of K2CO3 is needed to prepare 200.mL of a solution having a potassium ion concentration of 0.150 M?

Which of the following compounds is a nonelectrolyte?

Based on the solubility rules, which of the following should be soluble in water?

The oxidation number of Mn in KMnO4 is

Identify the Brønsted acid in the following reaction. NH3 + H2O →\rarr→ NH4+ + OH-

Which substance is acting as a Brønsted acid in the following reaction? HSO4- + NH4+ →\rarr→ H2SO4 + NH3

Which of the following compounds is a strong acid?

The reaction below can be classified as which type of reaction ? 2 NO2(g)+ H2O(l) →\rarr→ HNO2(aq)+ HNO3(aq)

Which of the following compounds is a weak electrolyte?

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The oxidation number of iodine increases by 6 in the following reaction. 2MnO₄^- + I^- + H₂O $\rarr$ 2MnO₂ + IO₃^- + 2OH^-

Identify the major ionic species present in an aqueous solution of C₁₂H₂₂O₁₁ (sucrose).

What mass of Na₂SO₄ is needed to prepare 350.mL of a solution having a sodium ion concentration of 0.125 M?

What volume (mL)of a 0.2450 M KOH(aq)solution is required to completely neutralize 55.25 mL of a 0.5440 M H₃PO₄(aq)solution?

Predict the products of the following single replacement reaction. Zn(s)+ CoCl₂(aq) $\rarr$

Identify the precipitate(s)formed when solutions of NH₄Cl(aq), AgClO₃(aq), and NaCl(aq)are mixed.

How many total electrons are transferred in the following reaction? 4 P(s)+ 5O₂(g) $\rarr$ 2P₂O₅(s)

What mass of K₂CO₃ is needed to prepare 200.mL of a solution having a potassium ion concentration of 0.150 M?

The oxidation number of Mn in KMnO₄ is

Identify the Brønsted acid in the following reaction. NH₃ + H₂O $\rarr$ NH₄⁺ + OH^-

Which substance is acting as a Brønsted acid in the following reaction? HSO₄^- + NH₄⁺ $\rarr$ H₂SO₄ + NH₃

The reaction below can be classified as which type of reaction ? 2 NO₂(g)+ H₂O(l) $\rarr$ HNO₂(aq)+ HNO₃(aq)