Chemistry: Activity 7.7 To find the end-point of an acid-base titration during neutralisation using an acid-base indicator - Methyl Orange

Sodium hydroxide is transferred using pipette to a clean conical flask. Three drops of methyl orange indicator are added to the alkali.

The colour of the methyl orange in alkali solution is yellow.

The solution turn orange when it is neutral. The end-point is reached.

If the acid is added in excess, the solution will turn red, indicate that the solution is acidic.

For more details on how to carry out this activity, please refer to Oxford Fajar reference book, or other similar reference book.