Unit 3 Test Alt. Assignment: Acids and Bases

Olivia was making lemonade and noticed it had a sour taste. Which types of substances are in lemons to give them this sour taste?

• acids

• bases

• salts

What happens when an acid reacts with a metal such as magnesium?

• The metal becomes polished and shiny.

• The temperature decreases.

• The acid is converted to a base.

• A chemical reaction occurs.

Question:
What is produced when an acid (like vinegar) reacts with a base (like baking soda) in a common household experiment?

• Only water

• A salt and water

• A strong acid

During a science experiment, Luna measures the pH of pure water. What pH value should she expect?

• 13

• 12

• 10

• 7

During a science experiment, Abigail mixed baking soda with water and measured the pH of the solution to be 8.40. What type of solution did Abigail create?

• acidic

• neutral

• basic

Label the side of the pH scale that includes the acids and the side that includes the bases.

a

b

BASES

ACIDIC

Which of the following best describes a Brønsted-Lowry acid?

• A substance that donates hydrogen ions (H⁺).

• A substance that releases energy as heat.

• A substance that increases the pH of a solution.

Which of the following best describes a Brønsted-Lowry base?
A) A substance that accepts hydrogen ions (H⁺).
B) A substance that gives away oxygen atoms.
C) A substance that breaks down into smaller molecules.

• A substance that accepts hydrogen ions (H⁺).

• A substance that gives away oxygen atoms.

• A substance that breaks down into smaller molecules.

What is the only requirement stated by the Brønsted-Lowry definition?

• Acids increase the concentration of hydrogen ions (H⁺) in water.

• Acids donate protons (H⁺) and bases accept protons (H⁺).

• Acids release electrons, and bases accept electrons.

Which of the following best describes an Arrhenius acid and base?

• An acid produces electrons in water, and a base produces neutrons in water.

• An acid increases the temperature of water, and a base decreases the temperature of water.

• An acid produces H⁺ ions in water, and a base produces OH⁻ ions in water.