Post a New Question

college chemistry

posted by .

In the derivation of this expression:

[ln]/[HIn]A# 2 * A#1,acid/A# 2,basic * A#1

We assumed that the HIn form of the indicator is the only form present in the most acidic solution. Is this a valid assumption? Why or why not? Support your answer by determining the amount of In--‐ present in the most acidic solution. You may assume that the initial concentration of the indicator is 1mM.

I think that the assumption of the Hln form of the indicator is the only form present in the most acidic solution is valid but I am not sure how I would go about supporting my answer by determining the amount of ln- present in the most acidic solution.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    An indicator has the reaction HIn(aq)<-->+In-(aq). Explain how the indicator can change color when a strong acid is poured into a solution of this indicator. Did you intend to write HIn(aq) <==> H^+(aq) + In^-(aq) addition …
  2. chem

    an indicator HIn is blue and its anion In- is red, Ka of indicator is 0.0001 at what pH value will a solution containing HIn be blue?
  3. chemistry

    The ionization constant Ka of an indicator HIn is 1.0x10^-6. The color of the nonionized form is red and that of the ionized form is yellow. What is the color of this indicator in a solution whose pH is 4.00?
  4. chemistry

    An indicator has the reaction Hln(aq) ↔ H+(aq) + In-(aq). Explain how the indicator can change color when a strong base is poured into a solution of this indicator. Will a strong base dissociate?
  5. chemistry

    An indicator has the reaction Hln(aq) ¡ê H+(aq) + In-(aq). Explain how the indicator can change color when a strong base is poured into a solution of this indicator. Will a strong base dissociate?
  6. Chemistry

    In the derivation of this expression: [ln]/[HIn]A# 2 * A#1,acid/A# 2,basic * A#1 We assumed that the HIn form of the indicator is the only form present in the most acidic solution. Is this a valid assumption?
  7. chem 126

    Phenolphthalein is a commonly used indicator that is colorless in the acidic form (pH < 8.3) and pink in the basic form (pH > 10.0). It is a weak acid with a pKa of 8.7. What is the ratio of the conjugate base concentration to …
  8. Chemistry

    The indicator bromocresol green (HIn) can be in two different forms: As HIn the color of the indicator is yellow, an In the color of the indicator is blue, and an equilmolar mixture of the two species is green. The Ka of the indicator …
  9. Chemistry

    The ionization constant Ka of an indicator HIn is 1.0x10^-6. The color of the nonionized form is red and that of the ionized form is yellow. What is the color of this indicator in a solution whose pH is 4.00?
  10. Chemistry

    The indicator HIn has a dissociation constant of 1*10^-4 M. HIn<===> H30^+ + In^- Yellow Red When the pH value of the solution is 7, 1)the indicator shows the colour red 2)at this time most of the indicator has been dissociated …

More Similar Questions

Post a New Question