Acids, bases and salts - (CCEA)What is a base?

Many chemicals are acidic, neutral or alkaline. We can distinguish one from another using indicators. Acidity and alkalinity are measured on the pH scale.

Part ofCombined ScienceAcids, bases and salts

What is a base?

Acids and bases

A is a metal oxide or metal hydroxide that neutralises an acid to produce a salt and water. An alkali is a soluble base.

Bases and alkalis — Figure caption,
All alkalis are bases, but only soluble bases are alkalis.

Reactions of acids

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