pH scale
pH relates to hydrogen-ion activity. This topic is part of Chemistry within Science & Nature. This page currently draws on 4 supporting questions, with answers and bonus facts available below.
pH scale trivia questions
The pH scale measures how acidic or what a solution is?
Answer: Basic
Bonus fact: pH relates to hydrogen-ion activity.
A pH of 7 is approximately what in pure water at room temperature?
Answer: Neutral
Bonus fact: Acids are below 7 and bases above 7 under common conditions.
Because pH is logarithmic, a difference of one pH unit corresponds to roughly what change in hydrogen-ion concentration?
Answer: Tenfold
Bonus fact: Each whole pH step represents a factor of ten.
On the standard pH scale, an acidic solution generally has a pH below what number?
Answer: 7
Bonus fact: A pH of 7 is neutral at ordinary laboratory conditions; lower values are acidic.