Experiment:Red Cabbage Indicator
Aim:To make our own indicator.
The Red Cabbage is red in acid solution
Purple is a neutral solution
Greenish-yellow is a base solution
Red Cabbage contains a pigment molecule called FLAVIN(antocianina).
The red cabbage juice will work over a wide pH range.To identified substances(acid or Bases)
Conclusion:The red Cabbage works as an indicator because we could identify the changes of each substance and classifies the bu colour of pH.For that we needed the ph scale.
Experiment :Acids and Bases
Aim:To find which substances are acid and bases by using different indicators
Indicators(blue and red Litmus paper)
Procedure:Drop one drop of each substance on the indicators(the litmus papers) and record the change of colour.
Conclusion:When the red litmus paper changes to blue means that the substance is a base,If it stays red is an acid.
And when we have blue litmus paper and changes to red means that the substance is and acid,if it stays blue is a base.