What do you observe when you drop a few drops of acetic acid

• Science Practical (C10)

What do you observe when you drop a few drops of acetic acid to a test tube containing:

a) Phenolphthalein c) distilled water
b) Universal indicator d) sodium hydrogen carbonate

i) Acetic acid will remain colourless in phenolphthalein.

ii) Acetic acid will dissolve in distilled water forming a clear solution.

iii) Universal indicator gives orange colour with acetic acid.

iv) Sodium hydrogen carbonate will give brisk effervescence due to the formation of CO₂ gas.