The pH scale

• What do acids make when they are in water?

  H* ions in aqueous solution
• What do alkalis make when they are dissolved water?

  OH ions in aqueous solution
• The pH scale runs from 0 to 14 + is a measure of the acidity or alkalinity of a solution. It can be measured using universal indicator or a pH probe.

  
• Label the pH scale

  A) Neutral

  B) Acidic

  C) Alkaline

  
• In neutralisation, reactions the ions react together to form water

  H+ + OH- -> H2O