Question

can one take succinic acid solution in the titration flask and NaoH solution in the burette which indicator is used ? 1. methyl orange. 2. methyl red. 3.phenolphthalein. 4.bromophenol blue​

Answer 1

Answer:

option 4- phenolphthalein

Explanation:

as succinic acid is a weak acid and sodium hydroxide is a strong base therefore pH range would be 7-11

and phenolphthalein best work in pH range 8-11

therefore phenolphthalein should be used

Answer 2

If one take Succinic Acid solution in the titration flask and NaOH solution in the burette then Phenolpthalein should be used as an indicator for the titration.

Explanation:

Here, the Acid-Base titration is between a weak acid and strong base. We are titrating the strong base NaOh against the weak acid Succinic acid (HOOC-CH2-CH2-COOH). The end result will be a color change from color less to pale pink.

As per the norms, Phenolpthalein is the best indicator that should be used for burette solutions which have PH more than 7 to 11.

The rest of the indicators that are mentioned in the options Methyl Orange can be used for the PH between 3-4.5, Methyl Red for 4.5-6.5 and Bromophenol Blue for PH between 6-7.5