Investigating changes in pH

• Investigating changes in pH on adding powdered calcium hydroxide or calcium oxide to a fixed volume of dilute hydrochloric acid
• Equipment

  • Dilute hydrochloric acid
  • Solid calcium hydroxide
  • Weighing boat
  • Measuring cylinder
  • Large beaker
  • Glass rod to stir reactant
  • White tile
• 1.measure 50 cm(3) of dilute hydrocochloric acid in measuring cylinder

  2.Pour this into large beaker
• 3.Tear UI paper place onto 10 tiles

  4.Use glass rod to get drop of acid then place on one UI paper. Then use colour and identify pH
• 5.weigh 0.3g of of calcium hydroxide on weighing balance

  6.Then add this to beaker with acid and record pH
• 7.continue to add 0.3g of calcium hydroxide

  8.Record results and put on graph