Chemical Changes

What does the pH scale measure?

• Temperature

• Acidity or alkalinity of a substance

• Density

• Pressure

A pH lower than 7 indicates a substance is:

• Acidic

• Alkaline

• Neutral

• Radioactive

What is the pH of a neutral solution?

• 0

• 7

• 10

• 14

Hydrochloric acid (HCl) is a:

• Weak acid

• Strong acid

• Organic acid

• Neutral substance

Sulphuric acid (H₂SO₄) is classified as a:

• Strong base

• Weak acid

• Strong acid

• Weak base

When an acid reacts with a base, what occurs?

• Neutralisation

• Titration

• Oxidation

• Precipitation