Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
What will be the pH of a 0.01 M HCl solution?
8
18
2
12
2
The pH of an aqueous solution is a measure of the hydrogen ion concentration. For a strong acid like HCl, it completely dissociates in water, and the pH is calculated as the negative logarithm of the molar concentration of H+ ions.
The pH of an aqueous solution is a measure of the hydrogen ion concentration. For a strong acid like HCl, it completely dissociates in water, and the pH is calculated as the negative logarithm of the molar concentration of H+ ions.
Think of pH as a 'power of ten' scale where every single step represents a ten-fold change in acidity; a 0.01 M solution is exactly two 'steps' away from a neutral state relative to its concentration.
pH = -log(concentration): 'Negative Log' for the 'Power of Hydrogen'.
pH=тИТlog10тАЛ[H+] тАФ Definition of pH
[H+][OHтИТ]=10тИТ14 тАФ Ion product constant of water at 25┬░C
Hydrochloric acid (HCl) is a strong acid that undergoes complete ionization in water: HClтЖТH++ClтИТ. Given the concentration of HCl is 0.01┬аM (which is 10тИТ2┬аM), the concentration of H+ ions is also 10тИТ2┬аM. Applying the pH formula: pH=тИТlog[H+]=тИТlog[10тИТ2]=тИТ(тИТ2)=2.
HCl is a strong monoprotic acid that provides one H+ ion per molecule.
The pH scale typically ranges from 0 to 14 at standard temperature.
A lower pH value indicates a higher concentration of hydrogen ions (more acidic).
Simple calculation for strong acids.
Does not account for activity coefficients in highly concentrated solutions.
Only applicable for fully dissociating acids.
Laboratory chemical titration.
Determination of industrial wastewater acidity.
Pure water has a pH of 7.
Option A (8) is basic, Option B (18) is outside the standard pH scale, and Option D (12) is strongly basic.
C is correct тАФ The concentration of 0.01┬аMHCl results in a pH of 2 because pH=тИТlog[10тИТ2]=2.
Always convert molar concentrations to scientific notation (powers of 10) before taking the log to simplify calculations in competitive exams.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants