Question 1

Which of the following equations best describes what will happen to formic acid when it reacts with water?

Accepted Answer

C

Question 2

Which of the following reactions illustrate the reaction of a base? I. NH₃ + H₂O → ⁺NH₄ + ^-OH II) HCl + H₂O → H₃O⁺ + Cl^- III) NaOH → Na⁺ + ^-OH IV) ⁺NH₄+ H₂O → H₃O⁺ + NH₃

Accepted Answer

E

Question 3

Ethylene glycol and propylene glycol are both

Accepted Answer

Both ethylene glycol and propylene glycol are diols, which means they contain two alcohol (-OH) groups.

Question 4

Which of the following statements best describes what happens when an acid reacts with water? I. The acid donates a proton.
II. Water donates a proton.
III. Water acts as a base.
IV. Hydronium is formed.
V. Hydroxide is formed.

Accepted Answer

When an acid reacts with water, it donates a proton (I), and water acts as a base (III) by accepting the released proton. This forms hydronium ions (H3O+), not hydroxide (V). Therefore, statements I, III, and IV are correct, making choice D the best answer. Statement II is not correct as water itself does not donate a proton but can accept it to form the hydronium ion.

Question 5

Which of the following atomic diagrams best represents H⁺?

Accepted Answer

The answer of Which of the following atomic diagrams best...

Question 6

The boxed species in the following reaction is

Accepted Answer

The answer of The boxed species in the following reaction...

Question 7

Which of the following statements about acids is NOT true?

Accepted Answer

An acid actually decreases the concentration of hydroxide in solution and increases the concentration of protons or, more accurately, hydronium ions (H3O+). Choice B is incorrect as it describes the behavior of a base, which would increase the concentration of hydroxide ions.

Question 8

Which of the following reactions best illustrates the reaction of an acid in aqueous solution?

Accepted Answer

The answer of Which of the following reactions best illustrates...

Question 9

Which of the following statements about bases is NOT true?

Accepted Answer

A base is not always negatively charged. In fact, many bases are neutral or even positively charged. The charge of a base depends on its specific chemical structure and properties, not on the fact that it is a base.

Question 10

Which of the following types of molecules and ions is NOT a base?

Accepted Answer

A cation is not a base because it has lost electrons and therefore cannot donate them to accept protons. An anion, a neutral molecule containing a nonbonding pair of electrons, and a tertiary nitrogen can all act as bases by accepting protons.

Question 11

Which of the following molecules is a base?

Accepted Answer

The answer of Which of the following molecules is a...

Question 12

Not all protons in a molecule can be donated in an acid-base reaction. Below are three molecules, each with the proton donated in an acid-base reaction circled. What do these protons have in common?

Accepted Answer

The answer of Not all protons in a molecule can...

Question 13

Which of the following compounds is a Brønsted Lowry base, but not an Arrhenius base?

Accepted Answer

HCl and NaOH are both Brønsted Lowry bases and Arrhenius bases. Ca(OH)2 is an Arrhenius base, but it can also be considered a Brønsted Lowry base because it can accept a proton to form Ca(OH)2+. CH3COOH (acetic acid) is a Brønsted Lowry acid, so it cannot be a base. NHSO3H (sulfamethazine) is a molecule with a nitrogen atom that can accept protons, making it a Brønsted Lowry base. However, it does not have hydroxide ions to release, so it is not an Arrhenius base. Therefore, the correct answer is C.

Question 14

The boxed species in the following reaction is

Accepted Answer

The answer of The boxed species in the following reaction...

Question 15

All acid-base reactions that we consider in this chapter occur in

Accepted Answer

All acid-base reactions considered in this chapter occur in water, which is a polar solvent. Choice D is the correct answer as it mentions water.

Question 16

Select the choice that correctly states whether the substance is an acid or a base.

Accepted Answer

Amines are known to be basic compounds. The other choices are incorrect as vinegar is acidic, gastric juice is acidic, sodium hydroxide is basic and morphine is neutral.

Question 17

In the body, ethylene glycol (antifreeze) is metabolized to a(n)

Accepted Answer

Ethylene glycol is metabolized to a toxic organic acid known as oxalic acid which can cause severe kidney damage and potentially lead to death.

Question 18

What do all bases have in common?

Accepted Answer

All bases have a nonbonding pair of electrons. This is what allows them to accept a proton (H+) and act as a proton acceptor in a chemical reaction. The other options are not true for all bases. For example, not all bases contain nitrogen or oxygen, and not all bases are salts.

Question 19

According to the Arrhenius definition, which of the following compounds is a base?

Accepted Answer

According to the Arrhenius definition, a base is a substance that produces hydroxide ions (OH-) in water. Compound I (KOH) and III (NaOH) both produce hydroxide ions when dissolved in water, while II (H2SO4) and IV (H2CO3) do not.

Question 20

A hydrogen atom without an electron is referred to as

Accepted Answer

When a hydrogen atom loses its only electron, it forms a positively charged ion, which is called a proton.

Quiz 9: Acids and Bases

Which of the following equations best describes what will happen to formic acid when it reacts with water?

Which of the following reactions illustrate the reaction of a base? I. NH3 + H2O → +NH4 + -OH II) HCl + H2O → H3O+ + Cl- III) NaOH → Na+ + -OH IV) +NH4 + H2O → H3O+ + NH3

Ethylene glycol and propylene glycol are both

Which of the following statements best describes what happens when an acid reacts with water? I. The acid donates a proton. II. Water donates a proton. III. Water acts as a base. IV. Hydronium is formed. V. Hydroxide is formed.

Which of the following atomic diagrams best represents H+?

The boxed species in the following reaction is

Which of the following statements about acids is NOT true?

Which of the following reactions best illustrates the reaction of an acid in aqueous solution?

Which of the following statements about bases is NOT true?

Which of the following types of molecules and ions is NOT a base?

Which of the following molecules is a base?

Not all protons in a molecule can be donated in an acid-base reaction. Below are three molecules, each with the proton donated in an acid-base reaction circled. What do these protons have in common?

Which of the following compounds is a Brønsted Lowry base, but not an Arrhenius base?

The boxed species in the following reaction is

All acid-base reactions that we consider in this chapter occur in

Select the choice that correctly states whether the substance is an acid or a base.

In the body, ethylene glycol (antifreeze) is metabolized to a(n)

What do all bases have in common?

According to the Arrhenius definition, which of the following compounds is a base?

A hydrogen atom without an electron is referred to as

Which of the following reactions illustrate the reaction of a base? I. NH₃ + H₂O → ⁺NH₄ + ^-OH II) HCl + H₂O → H₃O⁺ + Cl^- III) NaOH → Na⁺ + ^-OH IV) ⁺NH₄+ H₂O → H₃O⁺ + NH₃

Which of the following atomic diagrams best represents H⁺?