Question

Question 9 1 pts Suppose you have an indicator that is diprotic and has pK 1 - 3 and pK2 - 7. If Heln is yellow, Hin'is red, and In2-is blue what species is/are significantly present at pH of 7? what is the color of the indicator at a pH of 7? (Select Question 10 1 pts Indicators are commonly used during titrations to monitor the point at which an acid has fully been converted to its conjugate base for when a base has fully been converted into its conjugate acid). Its important to pick the proper ind to this one bolor in the beginning, and a different color once the acid or base has been fully converted, Forxample in the titration of 10 M H you start withienty Halland it gets converted to by the

Answer 1

Q9. What species is/are significantly present at pH of 7? : HIn^- and In^2-

What is the color of the indicator at a pH of 7? : magenta (combination of red and blue)

Explanation

Given : pH of solution = 7

pK_a2 of indicator = 7

Hence, for the given solution, pH is at pK_a2

Equal species of HIn^- and In^2- must be present.

The color of solution should be a mixture of red and blue which is magenta.