Unit 4.3 Review

Unit 4.3 Review

Acids and Bases

Unit 4.3 - Acids and Bases

• Properties of acids and bases

• pH

• Theories of acids and bases

• Strong and weak acids / bases

Multiple Choice

Which of the following conduct electricity in water (i.e. is an electrolyte)?

• acid

• base

• both an acid and a base

Multiple Choice

A sour taste is characteristic of which type of substance?

• acid

• base

• both an acid and a base

Multiple Choice

A bitter taste is a property of which type of substance?

• acid

• base

• both an acid and a base

Multiple Choice

Which type of substance feels slippery to the touch?

• acid

• base

• both an acid and a base

Multiple Choice

orange juice

• acid

• base

• both an acid and a base

Multiple Choice

Soap

• acid

• base

• an acid and a base

Multiple Choice

Examine the results (color change) of the pH paper shown in the picture. What type of substance was tested?

• an acid

• a base

• a neutral substance

• none of the above

Definitions of Acid and Base

• Arrhenius theory

• Bronsted-Lowry theory

• Lewis theory

Arrhenius Theory

• Acids: create H+ ions in an aqueous solution

• Bases: create OH- ions in an aqueous solution

• Solutions with more H+ are acids

• Solutions with more OH- are bases

Bronsted-Lowry Theory

• Acids are proton donors

• Bases are proton acceptors

• B/L acids and bases create acid base reaction

• Acids lose a proton and become a conjugate base

• Bases gain a proton and become a conjugate acid

Lewis Theory

• ​Acid - electron pair acceptor

• ​Base - electron pair donor

Multiple Choice

KOH will release which ion?

• OH-
• H+
• OH+
• H-

Multiple Choice

If a solution is basic which ion will be more present?

• H+

• OH+

• OH-

• H-

Multiple Choice

What ion did Arrhenius attribute the properties of acidic solutions to?

• H⁺

• OH^-

• H^-

• OH⁺

Multiple Choice

In the equation below, what is the Bronsted-Lowry base?

HCl + NH₃ → Cl^- + NH₄⁺

• HCl

• NH₃

• Cl^-

• NH₄⁺

Multiple Choice

In the equation below, what is the conjugate acid?

HCl + NH₃ → Cl^- + NH₄⁺

• HCl

• NH₃

• Cl^-

• NH₄⁺

Multiple Choice

NH₃

• Strong Acid

• Strong Base

• Weak Acid

• Weak Base

Multiple Choice

H₂SO₄

• Strong Acid

• Strong Base

• Weak Acid

• Weak Base

Multiple Choice

CH₃COOH

• Strong Acid

• Strong Base

• Weak Acid

• Weak Base

Multiple Choice

KOH

• Strong Acid

• Strong Base

• Weak Acid

• Weak Base