Group Activity Prepare Your Own Indicator Class 10 Science

This group activity prepare your own indicator  belongs to Acids, Bases and Salts of class 10 science.

                                            

Aim of the Group Activity

 To prepare an indicator

Material used in the Group Activity

 1.Beetroot
 2.Knife/mortar
 3.Test tubes
 4.Filter paper
 5.Water
 6.lemon juice solution,
 7.Soda-water
 8.Vinegar
 9.Baking soda solution

 

Procedure

We will take beetroot and crush it in a mortar. Now put it in a test tube or a container and add some amount of water. we will mix it and filter the extract and collect the filtrate in another test tube.

Now we will take four test tubes labelled A, B, C and D. now pour 2 mL each of lemon juice, soda water, vinegar and baking soda solution in the test tubes respectively.

We put 2-3 drops of the beetroot extract in each test tube  and note the colour change.

Observation

S.N.	Solutions	Colour change
Test tube A	Lemon juice	Light red
Test tube B	Soda water	Dark red
Test tube C	Vinegar	Dark red
Test tube D	Baking soda	blue

 

Explanation

 Lemon juice is acidic in nature and beetroot extract is also slightly acidic. So there is minimal colour change can be seen.

Soda water is also acidic so with beetroot extract, the colour of solution remains dark red.

 Vinegar is acidic and beetroot extract is also acidic, so when they are mixed, the colour of solution remains dark red.

Baking soda is alkaline in nature, when beetroot extract is added to it, colour changes to blue

Conclusion

The activity shows the colour changes of substance with natural indicators.