Question

What do you observe when you drop a few drops of acetic acid to a test tube containing: a) Phenolphthalein b) distilled water c) Universal indicator d) sodium hydrogen carbonate

Answer 1

a) Phenolphthalein remains colourless.

b) The acid gets diluted.

c) The colour in universal indicator is from red to reddish-orange.

d) Aqueous NaCl solution and CO2 is liberated.



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Answer 2

Answer:

When we add few drops of acetic acid to a test tube containing are as :

a ) . Phenolphthalein : Acetic acid will remain colourless in phenolphthalein

b ) . Distilled water : Acetic acid will dissolve in distilled water forming a clear solution

c ) . Universal indicator : It will give orange colour with acetic acid.

d ) . Sodium hydrogen carbonate : It will give brisk effervescence due to the

formation of CO₂ gas.