Reactions of Bases with Acids

Chemistry: Cambridge International GCSE Supplement, topic 7.1.3

Reactions of Bases

You need to know how bases react with acids and ammonium salts.

Acids

Acids

  • Bases neutralise acids.
  • It's important that we control how acidic soil is so that plants can grow properly. We can add a suitable base (such as slaked lime) to soil to neutralise soil acidity so that it is the optimum pH for plant growth.
Ammonium salts

Ammonium salts

  • When bases are heated with ammonium salts, they give off ammonia gas.
  • Base + ammonium salt → salt + ammonia + water

Test yourself on Reactions of Bases with Acids

  • Which of these equations is correct for when a base reacts with an ammonium salt?

  • Which of these can be used to neutralise an acid?

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