Question 1

Which of the following substances is a nonelectrolyte? A)KMnO₄ B)CH₃CH₂OH C)NaOH D)K₂SO₄ E)Na₂H

Accepted Answer

A nonelectrolyte is a substance that does not produce ions in solution, and therefore does not conduct electricity. Choice B, CH3CH2OH (ethanol), is a nonpolar molecule and does not dissociate into ions in solution, making it a nonelectrolyte. The other choices all contain ions and therefore are electrolytes.

Question 2

Which of the following substances is a strong electrolyte? A)CH₃CH₂OH B)C₈H₁₈ C)LiOH D)CO₂ E)PCl₅

Accepted Answer

LiOH is a strong electrolyte because it completely dissociates into Li+ and OH- ions in water. A and D are organic compounds and thus do not dissociate in water. B and E are covalent compounds and only partially dissociate in water, making them weak electrolytes.

Question 3

Which of the diagrams in the figure best represents an aqueous solution of Na₂SO₄? A)I B)II C)III D)either I or III E)none of these is correct

Accepted Answer

B

Question 4

Which of the following equations describes what happens when CH₃OH(l)dissolves in water? A)CH₃OH(l)→ C(aq)+ 4H(aq)+ O(aq) B)CH₃OH(l)→ C²⁻(aq)+ 4H+(aq)+ O²⁻(aq) C)2CH₃OH(l)→ 2C(aq)+ 4H₂(aq)+ O₂(aq) D)CH₃OH(l)→ CH₃OH(aq) E)CH₃OH(l)+ H₂O(l)→ CH₅O₂H(l)

Accepted Answer

The correct equation for dissolving CH₃OH (methanol) in water is simply the process of it becoming aqueous without breaking into ions or reacting with water to form new compounds. Methanol is a molecular compound and does not ionize in water.

Question 5

What ions, atoms, or molecules (in addition to the water molecules)are present after HNO₃(l)mixes with water? A)HNO₃(l) B)HNO₃(aq) C)H⁺(aq)+ NO₃^-(aq) D)H(aq)+ NO₃(aq) E)H(aq)+ N(aq)+ 3O(aq)

Accepted Answer

When HNO₃(l) mixes with water, it will ionize to form H+(aq), SO42-(aq), and NO2-(aq), which are represented as H⁺(aq)+ NO₃^-(aq) in choice C.

Question 6

Which of the following should be most soluble in water? A)Vitamin C (a very good hydrogen bonder) B)Vitamin A (a mostly nonpolar molecule) C)C₆H₆(l) D)I₂(s) E)O₂(g)

Accepted Answer

Vitamin C is a very good hydrogen bonder, which means it can form strong interactions with water molecules, leading to high solubility in water. Polar molecules like vitamin C are generally more soluble in water than nonpolar molecules like vitamin A. Choices C, D, and E are not recognizable compounds and cannot be evaluated for solubility.

Question 7

Which of the following statements regarding the rule "like dissolves like" is incorrect? A)Since cooking oil is composed primarily of hydrocarbons, it is insoluble in water. B)Iodine, I₂, is very soluble in water. C)Ethanol, CH₃CH₂OH, is water-soluble. D)Cooking oil, a nonpolar substance, is soluble in hexane, C₆H₁₄. E)Potassium nitrate, KNO₃, is soluble in water.

Accepted Answer

Iodine, I₂, is actually insoluble in water. This is because iodine is a nonpolar molecule and water is polar, so they do not have compatible intermolecular forces for mixing. The correct statement would be that iodine is very soluble in nonpolar solvents like hexane or carbon tetrachloride.

Question 8

Which of the following should be most soluble in water? A)fat (a nonpolar triglyceride molecule) B)C₆H₆(l) C)CH₃NH₂(l) D)I₂(s) E)O₂(g)

Accepted Answer

The molecule CH₃NH is a polar compound and is likely to be the most soluble in water due to its ability to form hydrogen bonds with water molecules. Fat, C₆H₆, I₂, and O₂ are all nonpolar and therefore are likely to be less soluble in water.

Question 9

What ions, atoms, or molecules (in addition to the water molecules)are present after Na₂SO₄(s)mixes with water? A)Na₂SO₄(l) B)Na₂SO₄(ag) C)Na⁺(aq)+ NaSO₄^-(aq) D)Na₂SO₃²⁺(aq)+ O₂^-(aq) E)2Na⁺(aq)+ SO₄^2-(aq)

Accepted Answer

When Na2SO4 (sodium sulfate) dissolves in water, it dissociates into 2 Na+ (sodium ions) and 1 SO4^2- (sulfate ion), which are all aqueous (aq).

Question 10

Which of the following substances is a nonelectrolyte? A)Na₂SO₄ B)CH₃OH C)KOH D)LiNO₃ E)RbCl

Accepted Answer

CH3OH is a covalent compound and will not dissociate into ions in solution, making it a nonelectrolyte. The other options all contain ions and will therefore be electrolytes.

Question 11

Which of the following equations describes what happens when HCl(g)dissolves in water? A)HCl(g)→ H+(aq)+ Cl⁻(aq) B)HCl(g)→ H(aq)+ Cl(aq) C)2HCl(g)→ H₂(aq)+ Cl₂(aq) D)2HCl(g)→ H₂(g)+ Cl₂(g) E)HCl(g)+ H₂O(l)→ H₃OCl(l)

Accepted Answer

When HCl(g) dissolves in water, it dissociates into H+(aq) and Cl^-(aq), which is correctly described by option A.

Question 12

Which of the diagrams in the figure best represents an aqueous solution of MgCl₂? A)I B)II C)III D)either I or III E)none of these is correct

Accepted Answer

The answer of Which of the diagrams in the figure...

Question 13

Which of the following substances is a strong electrolyte? A)CH₃CH₂OH B)C₆H₆ C)KOH D)SO₂ E)PCl₃

Accepted Answer

A strong electrolyte dissociates completely into ions in solution, and potassium hydroxide (KOH) is a salt that fully dissociates in water to form K+ and OH- ions. The other choices either do not dissociate completely (i.e. weak electrolytes) or do not ionize at all in solution (i.e. non-electrolytes).

Question 14

Which of the following substances is a nonelectrolyte? A)NaNO₃ B)LiOH C)C₆H₁₂O₆ D)LiCN E)CsCl

Accepted Answer

C₆H₁₂O₆ (glucose) is a nonelectrolyte because it does not dissociate into ions in solution, thus it does not conduct electricity.

Question 15

What ions, atoms, or molecules are present after CH₃CH₂OH(I)mixes with water? A)CH₃CH₂OH(aq)and H₂O(l) B)CH₃CH₂O^-(aq), H+(aq), and H₂O(l) C)CH₃CH₂O^-(aq), and H₃O⁺(aq) D)2C(aq), 6H(aq), and H₂O₂(l) E)CH₃⁺(aq), CH₂O^-(aq), H⁺(aq), and H₂O(l)

Accepted Answer

When ethanol (CH3CH2OH) is mixed with water, it dissolves without ionizing, resulting in CH3CH2OH(aq) and H2O(l).

Question 16

Which of the following should be most soluble in hexane, C₆H₁₄? A)NaCl B)NaNO₃ C)H₂O D)CH₃OH E)Br₂

Accepted Answer

Hexane is a nonpolar solvent and will dissolve nonpolar compounds the best. Of the choices given, Br₂ is the most nonpolar as it consists of only C and Br atoms. Therefore, E should be the most soluble in hexane.

Question 17

Which of the following should be most soluble in benzene, C₆H₆? A)H₂O B)CH₃OH C)I₂ D)NaCl E)NaNO₃

Accepted Answer

Benzene is a nonpolar solvent, so substances with nonpolar or weakly polar characteristics, like iodine (I2), are more soluble in it compared to polar substances or ionic compounds.

Question 18

Which of the following statements regarding the rule "like dissolves like" is incorrect? A)Since grease is nonpolar, it is not soluble in water. B)Nitrogen, N₂, is not very soluble in water. C)Methanol, CH₃OH, is not very water-soluble. D)Butane, C₄H₁₀, is soluble in cooking oil, a nonpolar substance. E)Calcium nitrate, Ca(NO₃), is soluble in water.

Accepted Answer

Methanol is a polar molecule and is water-soluble, so the statement that it is not very water-soluble is incorrect.

Question 19

Which of the following statements regarding the rule "like dissolves like" is incorrect? A)Since cooking oil is composed primarily of hydrocarbons, it is soluble in water. B)Oxygen, O₂, is not very soluble in water. C)Methanol, CH₃OH, is water-soluble. D)Cooking oil, a nonpolar substance, is soluble in heptane, C₇H₁₆. E)Sodium nitrate, NaNO₃, is soluble in water.

Accepted Answer

Cooking oil, being composed primarily of hydrocarbons which are nonpolar, is not soluble in water, which is a polar solvent. Therefore, statement A is incorrect.

Question 20

Which of the following substances is a strong electrolyte? A)CH₃OH B)C₆H₁₄ C)C₆H₁₂O₆ D)LiCl E)SO₂

Accepted Answer

LiCl is a strong electrolyte because it completely dissociates into Li+ and Cl- ions in solution. The other substances listed are either weak electrolytes or non-electrolytes.

Quiz 11: Solutions

Which of the following substances is a nonelectrolyte?

Which of the following substances is a strong electrolyte?

Which of the diagrams in the figure best represents an aqueous solution of Na₂SO₄?

Which of the following equations describes what happens when CH₃OH(l) dissolves in water?

What ions, atoms, or molecules (in addition to the water molecules) are present after HNO₃(l) mixes with water?

Which of the following should be most soluble in water?

Which of the following statements regarding the rule "like dissolves like" is incorrect?

Which of the following should be most soluble in water?

What ions, atoms, or molecules (in addition to the water molecules) are present after Na₂SO₄(s) mixes with water?

Which of the following substances is a nonelectrolyte?

Which of the following equations describes what happens when HCl(g) dissolves in water?

Which of the diagrams in the figure best represents an aqueous solution of MgCl₂?

Which of the following substances is a strong electrolyte?

Which of the following substances is a nonelectrolyte?

What ions, atoms, or molecules are present after CH₃CH₂OH(I) mixes with water?

Which of the following should be most soluble in hexane, C₆H₁₄?

Which of the following should be most soluble in benzene, C₆H₆?

Which of the following statements regarding the rule "like dissolves like" is incorrect?

Which of the following statements regarding the rule "like dissolves like" is incorrect?

Which of the following substances is a strong electrolyte?

Quiz 11: Solutions

Which of the following substances is a nonelectrolyte?

Which of the following substances is a strong electrolyte?

Which of the diagrams in the figure best represents an aqueous solution of Na2SO4?

Which of the following equations describes what happens when CH3OH(l) dissolves in water?

What ions, atoms, or molecules (in addition to the water molecules) are present after HNO3(l) mixes with water?

Which of the following should be most soluble in water?

Which of the following statements regarding the rule "like dissolves like" is incorrect?

Which of the following should be most soluble in water?

What ions, atoms, or molecules (in addition to the water molecules) are present after Na2SO4(s) mixes with water?

Which of the following substances is a nonelectrolyte?

Which of the following equations describes what happens when HCl(g) dissolves in water?

Which of the diagrams in the figure best represents an aqueous solution of MgCl2?

Which of the following substances is a strong electrolyte?

Which of the following substances is a nonelectrolyte?

What ions, atoms, or molecules are present after CH3CH2OH(I) mixes with water?

Which of the following should be most soluble in hexane, C6H14?

Which of the following should be most soluble in benzene, C6H6?

Which of the following statements regarding the rule "like dissolves like" is incorrect?

Which of the following statements regarding the rule "like dissolves like" is incorrect?

Which of the following substances is a strong electrolyte?

Which of the diagrams in the figure best represents an aqueous solution of Na₂SO₄?

Which of the following equations describes what happens when CH₃OH(l) dissolves in water?

What ions, atoms, or molecules (in addition to the water molecules) are present after HNO₃(l) mixes with water?

What ions, atoms, or molecules (in addition to the water molecules) are present after Na₂SO₄(s) mixes with water?

Which of the diagrams in the figure best represents an aqueous solution of MgCl₂?

What ions, atoms, or molecules are present after CH₃CH₂OH(I) mixes with water?

Which of the following should be most soluble in hexane, C₆H₁₄?

Which of the following should be most soluble in benzene, C₆H₆?