Understanding Acids and Bases

What is an acid?

• An acid is a substance that donates protons (H+) in a chemical reaction.

• A liquid that turns blue litmus paper red without any chemical reaction.

• A compound that has a pH level above 7.

• A substance that accepts electrons in a reaction.

What is a base?

• A base is a substance that can accept protons or donate electron pairs in chemistry, or a foundational number in mathematics.

• A base is a measurement of temperature in science.

• A base is a type of acid that releases hydrogen ions.

• A base is a type of fruit used in cooking.

What is the pH scale used for?

• To determine the color of a solution.

• The pH scale is used to measure the acidity or alkalinity of a solution.

• To assess the viscosity of a solution.

• To measure the temperature of a solution.

What pH value is considered neutral?

• 5

• 8

• 6

• 7

Name a common household acid.

• Vinegar

• Baking soda

• Hydrogen peroxide

• Lemon juice

Name a common household base.

• table salt

• baking soda

• vinegar

• sugar

What happens when an acid and a base react?

• An acid and a base neutralize each other without any products.

• An acid and a base react to form water and a salt.

• An acid and a base create carbon dioxide and a salt.

• An acid and a base produce hydrogen gas.

What is the taste of acids?

• Sour

• Savory

• Bitter

• Sweet

What is the taste of bases?

• Sweet

• Salty

• Bitter

• Sour

What is litmus paper used for?

• Litmus paper is used to test pH levels of solutions.

• To measure temperature of liquids.

• To filter impurities from water.

• To determine the color of a solution.