how to prepare acid base indicator at home
Answers
Answer:
you should make a paste of turmeric and paste it on a paper and a matchstick fold cotton on it and mix some surf in a cup sock it with the stick from cotton side write down what you want to write after when the paper will dry
Answer:
Vanilla essence serves as an olfactory indicator. An olfactory indicator is a substance whose smell differs in when added to acids and bases respectively. Vanilla essence has a characteristic pleasant smell. When added to a basic solution such as sodium hydroxide solution, the characteristic smell of vanilla essence vanishes. When added to an acidic solution such as hydrochloric acid, however, the characteristic pleasant smell of vanilla essence remains. This is how it helps such students to identify acids and bases
Beets: A very basic solution (high pH) will change the color of beets or beet juice from red to purple.
Blackberries: Blackberries, black currants, and black raspberries change from red in an acidic environment to blue or violet in a basic environment.
Blueberries: Blueberries are blue around pH 2.8-3.2, but turn red as the solution becomes even more acidic.
Cherries: Cherries and their juice are red in an acidic solution, but they turn blue to purple in a basic solution.
Curry Powder: Curry contains the pigment curcumin, which changes from yellow at pH 7.4 to red at pH 8.6.
Delphinium Petals: The anthocyanin delphinidin changes from bluish-red in an acidic solution to violet-blue in a basic solution.
Geranium Petals: Geraniums contain the anthocyanin pelargonidin, which changes from orange-red in an acidic solution to blue in a basic solution.
Grapes: Red and purple grapes contain multiple anthocyanins. Blue grapes contain a monoglucoside of malvidin, which changes from deep red in an acidic solution to violet in a basic solution.
Horse Chestnut Leaves: Soak horse chestnut leaves in alcohol to extract the fluorescent dye esculin. Esculin is colorless at pH 1.5 but becomes fluorescent blue at pH 2. Get the best effect by shining a black light on the indicator.
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