Acids, alkalis + titrations

• Litmus colours

  Acid : red

  Neutral : purple

  alkaline : blue
• Methyl orange colours

  Acid: red

  Neutral: orange

  Alkaline: yellow
• Phenolphtalein colours

  acid : colourless

  neutral : colourless

  alkaline : pink
• Acids

  releases $H^+$
• alkaline

  releases $OH^-$