Checklist

• If the ph increases by 1, the hydrogen ion concentration will increase by a factor of 10. The lowe the Ph the more hydrogen ions
• The pH scale is logarithmic so if the pH decreases by one it means that there are ten times as many H+ ions present.
• 1. Measure out 150cm^3 of dilute hydrochloric acid into a conical flask. Use a pipette or cylinder
  2. Measure out 0.5g of calcium oxide using a mass balance.
  3. carefully add the calcium oxide to the hydrochloric acid
  4. wait for the base to completely react, you will know this has happened when un reacted calcium oxide starts to collect at the bottom of the flask. Record the Ph of the solution using either a Ph probe or universal indicator
• If you make a solution of calcium hydroxide in water (called lime water) and bubble has through it, the solution will turn cloudy if there’s carbon dioxide present in the gas. The cloudiness is caused by the formation of calcium carbonate.