Question:
The concentration of hydrogen ions in a hydrochloric acid solution is $3 \times 10^{-3}M$. Its pH value is about ($\log 3 = 0.4771$)
The concentration of hydrogen ions in a hydrochloric acid solution is $3 \times 10^{-3}M$. Its pH value is about ($\log 3 = 0.4771$)
Show Hint
$pH = -\log [H^+]$ and use $\log(ab)=\log a + \log b$.
Updated On: Apr 24, 2026
- 2.32
- 2.52
- 2.47
- 3.47
- 5.52
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Concept:
\[
pH = -\log [H^+]
\]
Step 1: Substitute value
\[ pH = -\log (3 \times 10^{-3}) \]
Step 2: Apply log rule
\[ = -(\log 3 + \log 10^{-3}) = -(0.4771 - 3) \] \[ = 3 - 0.4771 = 2.52 \] Final Conclusion:
Option (B)
Step 1: Substitute value
\[ pH = -\log (3 \times 10^{-3}) \]
Step 2: Apply log rule
\[ = -(\log 3 + \log 10^{-3}) = -(0.4771 - 3) \] \[ = 3 - 0.4771 = 2.52 \] Final Conclusion:
Option (B)
Was this answer helpful?
0
0
Top KEAM Chemistry Questions
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
- $4\, g$ of copper was dissolved in concentrated nitric acid. The copper nitrate solution on strong heating gave $5\, g$ of its oxide. The equivalent weight of copper is :
- Green chemistry deals with
- Neopentyl bromide undergoes dehydrohalogenation to give alkenes even though it has no $\beta$- hydrogen. This is due to
- Plot of $ log\text{ }x/m $ against log $p$ is a straight line inclined at an angle of $ 45{}^\circ $ . When the pressure is $ 0.5 \,arm $ and Freundlich parameter. $ k $ is $ 10 $ , the amount of solute adsorbed per gram of adsorbent will be $ (log\text{ }5=0.6990) $
View More Questions
Top KEAM Ionic Equilibrium In Solution Questions
- The correct equation for the degree of association $'\alpha'$ of an associating solute, $'n'$ molecules of which undergoes association in solution, is
- Which of the following can act as Lewis acid?
- The concentration of hydrogen ions in a sample of soft drink is \( 2\times10^{-4}\,\text{mol L}^{-1} \). Its pH value is ( \( \log 2 = 0.3010 \) )
- A monobasic acid HA has pH of 3 in 0.1 M solution at 298 K. What is the pKa of the acid at 298 K?
- An aqueous solution of which of the following has the highest pH value
View More Questions
Top KEAM Questions
- i.$\quad$ They help in respiration ii.$\quad$ They help in cell wall formation iii.$\quad$ They help in DNA replication iv. $\quad$They increase surface area of plasma membrane Which of the following prokaryotic structures has all the above roles?
- A body oscillates with SHM according to the equation (in SI units), $x = 5 cos \left(2\pi t +\frac{\pi}{4}\right) .$ Its instantaneous displacement at $t = 1$ second is
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
Kepler's second law (law of areas) of planetary motion leads to law of conservation of
- If $\int e^{2x}f' \left(x\right)dx =g \left(x\right)$, then $ \int\left(e^{2x}f\left(x\right) + e^{2x} f' \left(x\right)\right)dx =$
View More Questions