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What is the pH scale? The pH scale shows how acidic a substance is. Learn what pH means and how the pH scale s measured in this KS3 chemistry guide.
However, a pH value between 0 - seven is acidic, and that from 7 - 14 is alkaline. The human body has a pH value of 7.35 - 7.4, which means that our blood is slightly alkaline in nature.
This means that the pH values of strong acids are lower than that of weak acids, which explains why the rate of reaction of strong acids with substances (such as metals, metal carbonates etc) is ...
GK Questions & Answers on Chemistry: pH Scale The pH value of any solution is a number which simply represents the acidity and basicity of that solution.
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