2. Bases

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Total cards: 6•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (6)

Front (Question)

What are bases?

Back (Answer)

Bases are substances which can neutralise an acid, forming a salt and water.

Front (Question)

Bases are usually … of metals

Back (Answer)

Oxides, hydroxides or carbonates of metals The presence of the OH- ions is what makes the aqueous solution an alkali

Front (Question)

What is an alkali

Back (Answer)

A base which is water-soluble is referred to as an alkali. So, all alkalis are bases, but not all bases are alkalis

Front (Question)

Sodium hydroxide Formula and Ions formed in water

Back (Answer)

NaOH Na+, OH-

Front (Question)

Potassium hydroxide Formula and Ions formed in water

Back (Answer)

KOH K+, OH-

Front (Question)

Aqueous ammonia/ ammonium hydroxide Formula and Ions formed in water

Back (Answer)

NH3 (+ H2O) NH4+, OH- Aqueous ammonia = ammonium hydroxide. Ammonia (NH₃) is the gas; ammonium (NH₄⁺) is the ion in compounds.