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WorksheetsUnderstanding Acids and Bases
Total questions: 15
Worksheet time: 8mins
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.
What color does litmus paper turn in an acid?
Green
Blue
Yellow
Red
What color does litmus paper turn in a base?
Red
Green
Yellow
Blue
What is an example of a strong acid?
Acetic acid (CH3COOH)
Sulfuric acid (H2SO4)
Hydrochloric acid (HCl)
Sodium hydroxide (NaOH)
What is an example of a weak base?
Sodium hydroxide (NaOH)
Potassium hydroxide (KOH)
Ammonia (NH3)
Calcium carbonate (CaCO3)
How do acids and bases affect indicators?
Acids and bases have no effect on indicators.
Indicators are unaffected by pH changes.
Indicators only change color in the presence of heat.
Acids and bases cause indicators to change color based on the pH of the solution.
