Acids and Alkalis

Give an example of a common acid.

• water

• battery acid

• lemon juice

• vinegar

What is an alkali?

• A type of chemical compound that is soluble in water and produces hydroxide ions (OH-) when dissolved.

• A type of chemical compound that is insoluble in water and does not produce any ions when dissolved.

• A type of chemical compound that is soluble in water and produces hydrogen ions (H+) when dissolved.

• A type of chemical compound that is insoluble in water and produces hydroxide ions (OH-) when dissolved.

Give an example of a common alkali.

• potassium hydroxide

• ammonium hydroxide

• hydrochloric acid

• sodium hydroxide

What are indicators used for?

• Indicators are used to measure or assess a particular condition or phenomenon.

• Indicators are used to control a particular condition or phenomenon.

• Indicators are used to confuse or mislead people.

• Indicators are used to predict future events.

Name one natural indicator.

• Litmus paper

• Bunsen burner

• Thermometer

• pH meter

What is the pH scale used for?

• The pH scale is used to measure the temperature of a solution.

• The pH scale is used to measure the volume of a solution.

• The pH scale is used to measure the density of a solution.

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

What is the pH value of a neutral substance?

• 7

• 14

• 10

• 1

What happens when an acid and an alkali react together?

• Neutralization reaction occurs

• Release of oxygen gas

• Formation of a salt

• Increase in temperature

What is the process called when an acid and an alkali react to form a salt and water?

• neutralization

• oxidation

• combustion

• ionization