Question:-
Which indicator is used in the titration of strong acid and a strong base?
The option are...
- A. Phenolphthalein
- B. Methyl orange
- C. Phenol red
- D. Thymol blue
The correct answer is A: Phenolphthalein indicator suitable in the titration of strong acid and strong base.
Explanation:
Equivalence or stoichiometric point for titrations between strong bases and weak acids is above pH 07.00, therefore the phenolphthalein indicator is used to perform a titration of a strong acid-strong base as it changes color between pH 8.3 and pH 10.00. It gives pink color to the basic solutions and is colorless in acidic ones.
Due to the high strength of the base, this pH change would occur within a fraction of a drop of actual neutralization in the case of a titration between a strong acid and a strong base.
A titration of hydrochloric acid (HCl) and sodium hydroxide (NaOH) is an example of strong acid and strong base.
You may also like this
No comments:
Post a Comment