Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa

What is the pH of 0.1 M NaHCO3 ? K1 = 4.5 \times 10-7, K2 = 4.5 \times 10-11 for carbonic acids.(Given: log 2 = 0.3, log 3 = 0.48)

Option: 1

5.64


Option: 2

6.84


Option: 3

9.66


Option: 4

8.34


Answers (1)

best_answer

\begin{array}{l}{\mathrm{NaHCO}_{3} \quad[\mathrm{C}]=0.1 \mathrm{\: M}} \\\\ {\begin{aligned} \mathrm{pH} &=\frac{\mathrm{ p K_{1}}+ \mathrm{p K_{2}}}{2}=\frac{7-\log 4.5+11-\log 4.5}{2} \\\\ \mathrm{pH}&=\frac{18-2 \log 4.5}{2}=9-\log 4.5=9-0.66=8.34 \end{aligned}}\end{array}

Therefore, option(4) is correct

Posted by

Pankaj Sanodiya

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

When will NTA issue JEE Main 2026 city slip for over 14.5 lakh? previous years’ trends
anam-khan

Engineering Entrance Exams 2026: JEE Main from January 21; multiple admission routes, shifting career choices
anam-khan

JEE Main 2026: NTA directs non-Aadhaar applicants to submit photo verification certificate by January 7

Latest Question