Gr 11 Physical Sciences: Ch 11.1 Acids and bases

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What is the characteristic of acids according to Arrhenius definition?

Decrease the concentration of H3O+ ions in solution
Decrease the concentration of OH− ions in solution
Increase the concentration of OH− ions in solution
Increase the concentration of H3O+ ions in solution (correct)

Which of the following is an example of a polyprotic acid?

Acetic acid (CH3COOH)
Hydrochloric acid (HCl)
Sulfuric acid (H2SO4) (correct)
Sodium hydroxide (NaOH)

What is the term for substances that can act as both acids and bases?

Amphoteric (correct)
Polyprotic
Monoprotic
Amphiprotic

According to Bronsted-Lowry definition, what is an acid?

A substance that donates protons (D) Signup and view all the answers

What is a conjugate acid-base pair?

Two species that transform into each other by gain or loss of a proton (A) Signup and view all the answers

Which of the following is an example of a base?

Sodium hydroxide (NaOH) (C) Signup and view all the answers

What is the characteristic of bases according to Arrhenius definition?

Increase the concentration of OH− ions in solution (C) Signup and view all the answers

What is the term for a subset of amphoteric substances that can donate or accept protons?

Amphiprotic (A) Signup and view all the answers

What is the common characteristic of hydrochloric acid (HCl), sulfuric acid (H2SO4), and acetic (ethanoic) acid (CH3COOH)?

They are all acids (B) Signup and view all the answers

Which of the following is a correct statement about the Bronsted-Lowry definition of acids and bases?

It defines acids as proton donors and bases as proton acceptors (D) Signup and view all the answers

What is the result of the reaction between sulfuric acid (H2SO4) and hydroxide ions (OH−)?

The formation of water (H2O) and hydrogen sulfate ions (HSO4−) (C) Signup and view all the answers

What is the term for a substance that can donate or accept protons (H+)?

Amphiprotic (B) Signup and view all the answers

Which of the following substances can act as both an acid and a base, depending on the reaction?

Water (H2O) (D) Signup and view all the answers

What is the role of an acid in a reaction, according to the Bronsted-Lowry definition?

To donate a proton (H+) (C) Signup and view all the answers

Which of the following is an example of a conjugate acid-base pair?

Sulfuric acid (H2SO4) and hydrogen sulfate ions (HSO4−) (D) Signup and view all the answers

What is the result of the reaction between sulfuric acid (H2SO4) and two hydroxide ions (OH−)?

The formation of water (H2O) and sulfate ions (SO4^2-) (D) Signup and view all the answers

Which of the following is NOT a characteristic of acids and bases?

They can only be classified as either acids or bases (D) Signup and view all the answers

What is the main difference between the Arrhenius and Bronsted-Lowry definitions of acids and bases?

The type of ions they increase in solution (C) Signup and view all the answers

What is the role of water in acid-base reactions?

It can act as both an acid and a base (B) Signup and view all the answers

What happens when a polyprotic acid donates all its protons?

It becomes a salt (B) Signup and view all the answers

What is the relationship between a conjugate acid-base pair?

They are two species that transform into each other by gain or loss of a proton (B) Signup and view all the answers

Which of the following is an example of an amphiprotic substance?

Water (H2O) (A) Signup and view all the answers

What is the result of the reaction between sulfuric acid (H2SO4) and one hydroxide ion (OH-)?

HSO4- and H2O (C) Signup and view all the answers

Why are acids and bases important in chemistry?

They play a crucial role in many chemical reactions (C) Signup and view all the answers