Acids, Alkalis and Titrations
- Acids can be strong or weak.
- Strong acids like sulphuric acid ionise almost completely in water.
- This means almost every hydrogen atom is released to become a hydrated proton. (A large number of H+ (aq) ions are formed
- Weak acids like citric acid ionise only very slightly.
- This means only some of the hydrogen atoms in the compound are released, so a small number of H+ (aq) ions are formed.
- The pH of an acid or alkali is a measure of the concentration of H+ (aq) ions in a solution.
- Strong acids typically have a pH f about 1 or 2, whilst the pH of a weak acid could be 5 or 6.
- The pH of an acid or alkali can be measured with a pH meter or with universal indicator…