Title : INDICATORS Aim : To observe the actions of indicators Apparatus : Test tubes , hydrochloric acid , sodium hydroxide , water , sodium carbonate solution , litmus paper , screened methyl orange , phenolphthalein , methyl orange , bromothymol blue , methyl red Directions : Into four test tubes , add the acid , alkali , carbonate and water respectively . To each add a piece of red and blue litmus paper and observe the changes . Replace the contents of the tube and repeat with each indicator , washing and replacing after each . Write your results in an appropriate table . INDICATORS Criteria : OBSERVATION AND RECORDING Observation : 5 mks ,1/2 mark deducted for each incorrect observation . Recording : 5 mks for correct and appropriate tabulation