Discussion
pH of water is
Answer: C
The pH of pure water is 7 at 25 °C.
Water self-ionises to the extent that \[[\mathrm{H^+}] = [\mathrm{OH^-}] = 10^{-7}\ \mathrm{mol\,L^{-1}}\] so \(\mathrm{pH} = -\log(10^{-7}) = 7\). The value drifts below 7 at higher temperatures, but the water stays neutral because the two concentrations remain equal.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development