IGCSE Acids Bases & Salts Flashcard

Front

What is the pH scale?

Back

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

Front

What is 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 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 a neutral solution?

Back

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

Front

What happens to litmus paper in an acidic solution?

Back

Litmus paper turns red in an acidic solution.

Front

What happens to litmus paper in a basic solution?

Back

Litmus paper turns blue in a basic solution.

Front

What is effervescence?

Back

Effervescence is the formation of bubbles in a liquid, often due to a chemical reaction releasing gas.

Front

What is the reaction of acids with metals?

Back

Acids react with metals to produce hydrogen gas and a salt.

Front

What is the reaction of acids with carbonates?

Back

Acids react with carbonates to produce carbon dioxide, water, and a salt.

Front

What is the role of Universal Indicator?

Back

Universal Indicator is a pH indicator that changes color to show the acidity or basicity of a solution.