Acids and Bases

According to the Brønsted-Lowry definition, acids are substances that ________.

• donate protons

• accept protons

• donate electrons

• accept electrons

Which of the following is an example of a Lewis acid but not a Bronsted-Lowry Acid?

• HCl

• NH3

• BF3

• H2O

Which of the following is a characteristic of bases?

• They contain OH ions

• They react with acids to form salts

• They turn red litmus paper blue

• They have a bitter taste

What is the definition of acid strength?

• The ability of an acid to become a base

• The ability of an acid to accept protons

• The ability of an acid to donate neutrons

• The ability of an acid to donate protons

Which of the following is a characteristic of strong acids?

• They completely ionize in water

• They partially ionize in water

• They have a high pKa value

• They have a low pKa value

According to the Lewis definition, a Lewis acid is a substance that ________.

• accepts an electron pair

• donates an electron pair

• accepts a proton

• donates a proton

What is the definition of an amphoteric substance?

• A substance that can act as both an acid and a base

• A substance that can only act as an acid

• A substance that can only act as a base

• A substance that cannot react with acids or bases

What is the pH of a neutral solution?

• pH < 7

• pH = 7

• pH > 7

• pH can vary depending on the solution

What is the Henderson-Hasselbalch equation used for?

• Calculating the pH of a solution

• Determining the concentration of an acid

• Measuring the strength of a base

• Calculating the pKa of a compound

What is the purpose of a buffer?

• To maintain a stable pH in a solution

• To increase the acidity of a solution

• To decrease the basicity of a solution

• To neutralize acids and bases