Home
Class 11
CHEMISTRY
An acidic indicator ionises as I(n) H h...

An acidic indicator ionises as `I_(n) H hArr "In"^(-) + H^(+)` . The molecular and ions of the indicator show different colours. The indicator changed it colour if its acidic of basic form completely predominant.
Dissociation constant of an acidic indicator is `10^(-5)` . At what `p^(H)` 80% of the indicator exists in molecular form ?

A

`4.4`

B

` 6.6 `

C

` 5.5`

D

` 3.3`

Text Solution

Verified by Experts

The correct Answer is:
A
` pH = p^(kln ) + log ""([In^(-) ])/( [HIn]) `
` pH =5+ log ""(20)/( 80 ) =5- log 4 = 4.4 `
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE -IV LEVEL -I (ADVANCED) (Matrix Matching Type Questions))|2 Videos

  • IONIC EQUILIBRIUM

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE -IV LEVEL -I (ADVANCED) (Integer Type Questions))|10 Videos

  • IONIC EQUILIBRIUM

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE -IV LEVEL -I (ADVANCED) (More than One correct answer Type Questions))|10 Videos

  • HYDROGEN AND ITS COMPOUNDS

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|20 Videos

  • ISOMERISM

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE ( PRACTICE SHEET (ADVANCED) INTEGER TYPE QUESTIONS)|10 Videos

Similar Questions

Explore conceptually related problems

Correct the statement if it is wrong: Indicators show different colours in acidic and basic solutions.

Methyl orange and Phenolphthalein are indicators. Collect the information about their colour change in Acid and Basic solutions.

Knowledge Check

  • An acidic indicator ionises as I_n H hArr In^(-) + H^(+) . The molecular and ions of the indicator show different colours. The indicator changed it colour if its acidic of basic form completely predominate. What is the percentage of basic form acidic indicator . (P^(ka) =6) is an aqeous NaCl soluition at 25% C

    A
    `90 %`
    B
    ` 80 %`
    C
    ` 60 %`
    D
    ` 100 %`

  • An acidic indicator ionises as I_(n) H hArr "In"^(-) + H^(+) . The molecular and ions of the indicator show different colours. The indicator changed it colour if its acidic of basic form completely predominant. What is the percentage of basic form acidic indicator (p^(ka) = 6) is an aqeous NaCl solution at 25^(@) C

    A
    0.9
    B
    0.8
    C
    0.6
    D
    1

  • An acidic indicator ionises as I_(n) H hArr "In"^(-) + H^(+) . The molecular and ions of the indicator show different colours. The indicator changed it colour if its acidic of basic form completely predominant. An indicator with P^(Kin) = 5 is added to a solution with p^(H) = 5 . What is the percentage of acidic form of the indicator

    A
    0.25
    B
    0.5
    C
    0.75
    D
    1

    • Similar Questions

    Explore conceptually related problems

    An acidic indicator ionises as I_n H hArr In^(-) + H^(+) . The molecular and ions of the indicator show different colours. The indicator changed it colour if its acidic of basic form completely predominate. An indicator with P^(K In) =5 is added to a solution with P^(H)= 5 What is the percentage at acidic form of the indicator

    An acidic indicator ionises as I_n H hArr In^(-) + H^(+) . The molecular and ions of the indicator show different colours. The indicator changed it colour if its acidic of basic form completely predominate. An indicator with P^(K In) =5 is added to a solution with P^(H)= 5 What is the percentage at acidic form of the indicator

    An acidic buffer contains equal concentration of acid and salt . The dissociation constant of acid is 10^(5) The P^(H) of the buffer solution is

    An acid -base indicator has a Ka of 3.0 xx 10^(-5) The acid form of the indicator is red and the basic form is blue. Then

    An acid base indicator (K_(a) =10^(-5)) has its pH range 4.4 - 6.0. The correct statement (s) amongst the following is/are

    Home
    Profile