A. Finding the pH of the following samples by using pH paper/universal indicator:
(i) Dilute Hydrochloric Acid
(ii) Dilute NaOH solution
(iii) Dilute Ethanoic Acid solution
(iv) Lemon juice
(v) Water
(vi) Dilute Hydrogen Carbonate solution

Dear student,

(i) Dilute hydrochloric acid is an acid and acids have pH less than 7.
(ii) Dilute NaOH is a base and it has a pH of more than 7.
(iii) Dilute ethanoic acid is a weak acid so it will have a pH of less than 7.
(iv) Lemon juice contains citric acid, which is acid and has a pH of less than 7.
(v) Water is a neutral substance and it has a pH of 7.
(vi) Dilute hydrogen carbonate solution is a weak acid and it has a pH of less than 7.

The exact pH can be determined experimentally.

Regards

  • 0
What are you looking for?