Lesson 3 of 4 · Grade 10 Chemistry

Acids, bases and salts

18 min

Acids

Produce H⁺ ions in water. pH < 7.

  • Strong acids (fully ionised): hydrochloric (HCl), sulphuric (H₂SO₄), nitric (HNO₃).
  • Weak acids (partly ionised): ethanoic (vinegar), citric, carbonic.

Reactions:

  • Acid + metal → salt + hydrogen: Zn + 2HCl → ZnCl₂ + H₂
  • Acid + base → salt + water (neutralisation)
  • Acid + carbonate → salt + water + carbon dioxide

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