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Concordian International School

Middle School Science: pH Scale

Resources for MYP/DP Science

Criterion B & C

View Article on Credo


What is the pH scale? This is a scale from 0 to 14. It is used to describe a substance as acid, neutral, or alkali. Numbers below 7 are acid7 is neutral (neither acid nor alkali), and numbers above 7 are alkali.

Databases to Use

The Meaning of pH

Acids and Bases

Videos to Watch

Acids in the Atmosphere

"Acid rain woods1" by Nipik. Licensed under Public Domain via Wikimedia Commons

Syllabus - 9.3 The acid environment : 2. Acid oxides in the atmosphere.

Measuring pH Values