iodine is titrated with thiosulfate. What color change signals the endpoint?A.Green to blueB.Blue to greenC.Blue to clearD.Clear to blue

In the titration experiment you carried out in your CHM 108 practical, the colour change of yoursolution when using the phenolphthalein indicator isA. Colourless to PinkB. Pink to ColourlessC. Pink to RedD. Pink to Yellow

Q3. Now consider the moment when the blue colour change is about to occur (i.e. when there is no more thiosulfate remaining in solution). Based on the initial experiment and initial concentrations of reagents, calculate the concentrations of the reagents present in the flask at the moment just before the blue colour change begins (ignore the starch, and the S4O62- which is formed as the other by-product in this reaction). Does Reaction (1) continue beyond this point? a. yes b. no Based on what you have calculated, which reagent in Reaction (1) is the limiting reagent? a. H+ b. H2O2 c. I- d. S2O32-

Based on your pre-lab calculation (see lab manual), what is the threshold concentration of iodine required for the solution to turn blue?Question 9Answer2.50 × 10–3 mol/L2.00 × 10–5 mol/L5.00 × 10–3 mol/L4.00 × 10–5 mol/L1.25 × 10–3 mol/L

WHICH OF THE FOLLOWING IS USED AS AN INDICATOR IN THE TITRATION OF A STRONG ACID AND A WEAK BASE?a.Phenolphthaleinb.Methyl orangec.Fluoresceind.Thymol blue

For the titration of a weak base with a strong acid, determine the initial color of solution if the indicator methyl yellow is used. State the color at the completion of the titration