Effect of China rose indicator on curd
Answers
Answer:Through the China rose indicator, the curd changes its colour.
Explanation: The curd changes its colour because curd is a base
What is Acid-Base Indicator?
Acid-Base Indicator is a Chemical Substance or determinant which determines whether a compound/element/mixture is acidic in nature or it is basic.
ACIDS, BASES AND SALTS
Acid are the substances which gives H⁺ (Hydrogen/Hydronium Ion) ion while they disassociate in water.
They are corrosive as well as sour in taste. They turns Blue Litmus Red.
*Litmus is also an indicator obtained from Lichens.
pH of such substance lies in [1,7)
Base are the Substances which gives OH⁻ (Hydroxide) ion while it disassociate in water.
These are also corrosive and bitter in taste which turns red litmus to blue.
pH of such substance lies between (7,14]
Salts are the substances which are formed due to the reaction between an acid and a base known as Neutralisation reaction.
Example
NaOH(base) + HCl(acid). ----> NaCl(salt) + Water
China Rose Indicator
China Rose Indicator are obtained from the Petals of China rose by keeping it in warm water for some hours.
The red coloured solution is used as an indicator for detecting an acid or a base solution.
It turns into magenta in acidic medium and green in basic medium. As it obtained from plant source, it is a natural indicator.
Curd is an extract from milk which is sour in taste. It has pH 4.5 to 5.5, hence it is acidic in nature due to presence of an acid known as Lactic Acid.
As it is Acidic in nature, the China rose indicator gives colour from red to Slight Magenta.