Multiple Choice
On the pH scale, a change of 1 pH unit corresponds to a tenfold change in . How many times more acidic (in terms of concentration) is a solution with pH 6 than a solution with pH 9?
24
views
17. Acid and Base Equilibrium
The pH Scale
Multiple Choice
On the pH scale, distilled water with at is considered:
A
Neutral
B
Acidic
C
Strongly acidic
D
Basic (alkaline)
Verified step by step guidance1
Recall that the pH scale measures the acidity or basicity of a solution, where pH is defined as \(\mathrm{pH} = -\log[\mathrm{H}^+]\).
Understand that a pH of 7 at 25\(\degree\) C corresponds to a neutral solution, meaning the concentration of hydrogen ions \([\mathrm{H}^+]\) equals the concentration of hydroxide ions \([\mathrm{OH}^-]\).
Recognize that distilled water is pure water without added acids or bases, so its pH is typically 7 at 25\(\degree\) C, indicating neutrality.
Compare the given pH value to the pH scale: values less than 7 indicate acidity, values greater than 7 indicate basicity, and exactly 7 indicates neutrality.
Conclude that since the pH of distilled water is 7, it is considered neutral on the pH scale.
Related Videos
Related Practice
