Acids and Bases

Front

What is the definition of an acid?

Back

An acid is a substance that donates protons (H+) in a solution and has a pH less than 7.

Front

What is the definition of a base?

Back

A base is a substance that accepts protons (H+) or donates hydroxide ions (OH-) in a solution and has a pH greater than 7.

Front

What is the pH scale?

Back

The pH scale is a logarithmic scale used to measure the acidity or basicity of a solution, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What is the pH of pure water?

Back

The pH of pure water is 7, which is considered neutral.

Front

What does it mean for a substance to be neutral?

Back

A neutral substance has a pH of 7, meaning it is neither acidic nor basic.

Front

What is litmus paper used for?

Back

Litmus paper is used to determine the acidity or basicity of a solution by changing color in response to pH.

Front

What color does blue litmus paper turn in an acidic solution?

Back

Blue litmus paper turns red in an acidic solution.

Front

What color does red litmus paper turn in a basic solution?

Back

Red litmus paper turns blue in a basic solution.

Front

What is the role of pH paper in determining pH?

Back

pH paper changes color based on the pH of the solution, allowing for visual determination of acidity or basicity.

Front

What is a common example of an acid found in food?

Back

A common example of an acid found in food is citric acid, which is present in citrus fruits like oranges.