Acid and Bases

What is a base?

• A substance that is a metal oxide or hydroxide.

• A liquid that has a pH less than 7.

• A compound that donates protons in a reaction.

• A gas that reacts with acids to form salts.

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

• A strong acid partially dissociates in solution, while a weak acid completely dissociates.

• A strong acid does not dissociate in solution, while a weak acid does.

• A strong acid completely dissociates in solution, while a weak acid only partially dissociates.

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

What is a salt?

• A compound formed when the hydrogen ion of the acid is replaced by a metallic ion or ammonium ion.

• A liquid solution that contains dissolved minerals.

• A type of sugar used in cooking.

• A gas that is produced during combustion.

Tags

NGSS.MS-PS1-5

What is the role of indicators in acid-base chemistry?

• Indicators are substances that change color in response to changes in pH, helping to determine whether a solution is acidic or basic.

• Indicators are used to measure the temperature of a solution.

• Indicators are chemicals that neutralize acids and bases.

• Indicators are used to increase the concentration of a solution.

What is an acid?

• A substance that increases the pH of a solution.

• A substance that dissociates in water to form hydrogen ions (H+) and has a pH less than 7.

• A substance that neutralizes bases.

• A substance that has a pH greater than 7.

What is the relationship between pH and hydrogen ion concentration?

• The pH of a solution is directly related to the hydrogen ion concentration; as H+ concentration increases, pH increases.

• The pH of a solution is inversely related to the hydrogen ion concentration; as H+ concentration increases, pH decreases.

• The pH of a solution has no relationship with hydrogen ion concentration; they are independent of each other.

• The pH of a solution is only affected by temperature, not by hydrogen ion concentration.

What is the significance of a pH of 14?

• A pH of 14 indicates a very alkaline solution, such as sodium hydroxide (NaOH) in high concentration.

• A pH of 14 indicates a neutral solution, such as pure water.

• A pH of 14 indicates a very acidic solution, such as hydrochloric acid (HCl).

• A pH of 14 indicates a slightly alkaline solution, such as baking soda.

What is the pH of blood?

• 6.8

• 7.0

• 7.4

• 8.0

Tags

NGSS.HS-LS1-3

What pH value indicates a neutral solution?

• 5

• 7

• 9

• 10

What is the pH of a strong acid?

• Less than 1

• Between 1 and 3

• Typically less than 3

• Greater than 7