Question

What do you observe when you drop a few drops of acetic acid to a test tube containing : (i) phenolphthalein (ii) distilled water (iii) universal indicator (iv) sodium hydrogen carbonate powder?

Answer 1

i. Colourless

ii No change

iii. It will show yellow color.

iv. Carbon Dioxide will be liberated.

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.