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Sxtended Learning - Activities and Projects
1. Using the knowledge of acids and bases, write a secret message wi
the help of baking soda and beet root. Explain how it works.
(Hint: Prepare baking soda solution in water. Use this solution to wr
the message on a sheet of white paper with a cotton bud. Rub a slice
fresh beet root over the message.)
Prepare red cabbage juice by boiling a piece of red cabbage in wa
Use it as an indicator and test the acidic and basic solutions with
Present your observations in the form of a table.
Bring the soil sample of your area. find out if it is acidic, basi
neutral. Discuss with farmers if they treat the soil in any manner.
Visit a doctor. Find out the medicines, he prescribes to treat aci
Ask him how acidity can be prevented.
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no acidity cannot be prevented.
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