Discussion
An aqueous solution of which of the following has the highest pH value?
Answer: C
The highest pH is that of 0.10 M \(\mathrm{NaOH}\).
A higher pH means a more basic solution. NaOH is a strong base, fully dissociated, so 0.10 M NaOH gives \(\mathrm{[OH^{-}]} = 0.10\) M:
\[ \begin{aligned} \mathrm{pOH} &= -\log 0.10 = 1 \\ \mathrm{pH} &= 14 - 1 = 13 \end{aligned} \]
The more dilute 0.01 M NaOH gives pOH 2 and pH 12, so it is less basic. The three acid solutions all have pH below 7: 0.10 M HCl has pH 1, and 0.5 M HCl and 0.50 M \(\mathrm{H_{2}SO_{4}}\) are more concentrated acids with pH near or below 0.3.
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