What food is acidic? What food is alkaline?

Aim: To investigate the properties of acidic, alkaline and neutral food.

Procedure: 1.Prepare food samples as below.

water

noodles

vitagen

bitter gourd

orange

                  2.Taste each of food samples, then record the taste of the food.

                  3.Use wet blue and red litmus paper to test the food samples.

                  4.Record the observation into table 1.


Observation:

Food sample	Taste	Red litmus paper	Blue litmus paper
Bitter gourd	Bitter	Red è blue	Blue è blue
Orange	Sour	Red è red	Blue è red
Noodles	Bitter	Red è blue	Blue è blue
Water	No taste	Red è red	Blue è blue
Vitagen	Sour	Red è red	Blue è red

                                                                        Table 1

Conclusion: 1. Acidic food tastes sour, changes blue litmus paper to red.


                    2. Alkaline food tastes bitter, changes the red litmus paper to blue.


                    3. Neutral food does not taste either sour or bitter, cannot change the colour of blue or red
                        litmus paper.