Question

what do you observe when you drop a few drops of hydrochloric acid to test tube containing blue Litmus Paper, distilled water, phenolphthalein sodium carbonate?

Answer 1

The colour of litmus paper changes to red and water becomes acidic.

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.