Acids and bases

Front

What is an acid?

Back

An acid is a substance that donates hydrogen ions (H+) in a solution, typically having a pH less than 7.

Front

What is a base?

Back

A base is a substance that accepts hydrogen ions (H+) or donates hydroxide ions (OH-) in a solution, typically having a pH greater than 7.

Front

What does a pH level of 7 indicate?

Back

A pH level of 7 indicates a neutral solution, meaning it is neither acidic nor basic.

Front

What is the pH scale?

Back

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

Front

What is the significance of litmus paper?

Back

Litmus paper is used to test the acidity or basicity of a solution; blue litmus paper turns red in acidic solutions, while red litmus paper turns blue in basic solutions.

Front

What is the formula for calculating pH?

Back

pH = -log[H+], where [H+] is the concentration of hydrogen ions in moles per liter.

Front

What is a strong acid?

Back

A strong acid is an acid that completely dissociates in water, releasing all of its hydrogen ions.

Front

What is a weak acid?

Back

A weak acid is an acid that partially dissociates in water, meaning not all of its hydrogen ions are released.

Front

What is a strong base?

Back

A strong base is a base that completely dissociates in water, releasing all of its hydroxide ions.

Front

What is a weak base?

Back

A weak base is a base that partially dissociates in water, meaning not all of its hydroxide ions are released.