Experiment 10

What is the indicator used in this experiment?

What color do you observed when KIO₃ and KI reacted in acidic conditions such as sulphuric acid?

In what conditions you have to add in starch and continue with titration process?

• When the solution turns to light yellow after titration

• After addition of KI and sulphuric acid in KIO₃

• When the brown color solution is observed

• When the blue color solution is observed

Choose the reducing agents in Part B and C.

i. Iodide, I^-

ii. Thiosulphate, S₂O₃^2-

iii. Iodate, IO₃^-

iv. Iodine,  I₂

• i and iv

• i and ii

• ii and iii

• iii and iv

Indicate all color changes in Part B

Indicate all color changes in Part C

If the blue color does not appear when the starch solution is added during titration, what is the next course of action?

• Continue with the titration

• Stop titration and record final burette reading

• Stop titration, discard the sample and redo again

List down one precaution associated with this experiment.

-Provide precaution that will directly affect you result-