Understanding Acids and Bases

What is an acid according to the Arrhenius definition?

• An acid is a substance that decreases the concentration of H+ ions in solution.

• An acid is a substance that increases the concentration of H+ ions in solution.

• An acid is a substance that has a pH greater than 7.

• An acid is a substance that increases the concentration of OH- ions in solution.

What is a base according to the Arrhenius definition?

• A base is a substance that increases the concentration of hydroxide ions (OH-) in solution.

• A base is a substance that decreases the concentration of hydrogen ions (H+) in solution.

• A base is a substance that increases the concentration of carbon dioxide (CO2) in solution.

• A base is a substance that neutralizes acids without affecting pH levels.

What is the pH range of acids?

• 7 to 14

• -1 to 0

• 0 to 6.9

• 6.9 to 10

What is the pH range of bases?

• 1 to 6

• 5 to 10

• 0 to 7

• 7 to 14

What is the neutral pH value?

• 8

• 5

• 6

• 7

What is a common indicator used to test pH?

• litmus paper

• phenolphthalein

• bromothymol blue

• pH meter

What is the difference between a strong acid and a weak acid?

• Strong acids are always liquid while weak acids are solid.

• A strong acid has a higher pH than a weak acid.

• Weak acids do not dissociate in solution at all.

• A strong acid fully dissociates in solution; a weak acid partially dissociates.

What is the process of neutralization?

• Neutralization involves the reaction of two bases to produce a gas and a liquid.

• The process of neutralization is the reaction between an acid and a base to form water and a salt.

• The process of neutralization is when an acid reacts with a metal to produce hydrogen gas.

• The process of neutralization is the combination of two acids to form a stronger acid.

Can you name a common household acid?

• Baking soda

• Lemon juice

• Vinegar

• Hydrogen peroxide

What is the role of acids and bases in everyday life?

• Acids and bases are essential in cooking, cleaning, and maintaining pH balance in biological systems.

• Acids and bases are primarily used for making cosmetics.

• Acids and bases have no impact on health or nutrition.

• Acids and bases are only used in industrial processes.