Question

Colours of phenolphthalein indicator 100 Alkaline End-point True False 1. The phenolphthalein indicator is not affected by the pH of the solution. 2. The phenolphthalein Indicator changes colour close to the point of neutralisation which shows the end-point of the titration, 3. When adding acid to base the phenolphthalein indicator changes colour from colourless to pink at the end of the titration Titra Acids and alkalis

Answer 1

0:0 Phenolphlein indi on tor is affected by the pH of indicator as it was a Coloured folution in alkaline medium and at the end point. Coloured faded to white. --Atutem ent I is folde 0 End point is decided by phenolp the ein or any indicator. → Because equivalence point is not rissible 1. So we add indicator. → choice of indicator should be in accordance with equivalence point. - pH at equin ralence point should be the pH for which indicator Should change its Colour. - Statement 9 - True Statement 3- False " Phenolpthlein is pink in basic medium. and should be Colourless in acidic medium. son oddition of Hei, Solution should turn to Colourless not pink. Statement 1 - False 8- True * 3- false