Practical

Question 1

Methyl orange

Answer 1

Yellow to orange, faint pink

Question 2

Screened methyl
orange

Answer 2

Violet(acid in flask) to Grey, Green

Question 3

Thymol blue

Answer 3

Red / Orange to Green, Bluish-green

Question 4

Thymolphthalein

Answer 4

Colourless, One drop of burette solution turns flask solution faint blue , Blue(solution became alkaline)

Question 5

Starch indicator
(for redox
titration)

Answer 5

Titrate halfway brown solution will turn yellowish. Starch is added at this point, turning the solution dark blue

One drop of burette solution decolourises the dark blue

colourless