Question

Explain the use of the following as in a locators. (a) China rose(b) phenolphthalein

Answer 1

Both china rose and phenolphthalein act as indicators i.e they change their colour when put in acids and bases .
phenolphthalein: In neutral or acidic solution ,it is colourless while in the basic solution,its colour changes to pink.
China rose:Acids turn china rose in magenta red and reddish while bases turn it to yellow or greenish yellow.

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