Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • The pH of a 0.1 molar solution of the acid HQ is 3. The value of the ionization constant, Ka of this acid is :Option: 1 <img alt="3\times 10^{-1}" sr

The pH of a 0.1 molar solution of the acid HQ is 3. The value of the ionization constant, Ka of this acid is :

Option: 1

3\times 10^{-1}


Option: 2

1\times 10^{-3}


Option: 3

1\times 10^{-5}


Option: 4

1\times 10^{-7}


Answers (1)

Given,

pH=3

Molarity = 0.1 M

\left [ H^{+} \right ]=\sqrt{K_{a}C}

H^{+}=10^{-pH}=10^{-3}

10^{-3}=\sqrt{K_{a}\times 0.1}\;\;\; or\; \; 10^{-6}=K_{a}\times 0.1

\therefore \; \; K_{a}=10^{-5}    

Therefore, the option number (3) is correct.

Posted by

Kshitij

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2025: 2nd attempt? Mistakes to avoid, tips to improve score, percentile
anam-khan

JEE Main 2025: What to expect on exam day? Section-wise paper pattern, marking scheme, last-minute tips
anam-khan

JEE Main 2025 Live: NTA JEE session 2 exams from tomorrow; updates on admit card, exam pattern, passing marks

Latest Question