Question

take some NaOH sol.in a test tube & add a a few drops of phenolpthalein
observe the color
now add a few drops of HCl & observe the the change.

1)What're the products formed in this activity
2)wht happens when v add HCl 2 the above sol.
3)wht change did u observe when NaOH sol. is added again to the test tube
4)wht do u infer in this activity

Answer 1

2- when we add HCL to the above solution then it become colourless.
3- the solution become pink in colour.
4- from this activity we conclude that phenolpthalein is acidic in nature.