Chemistry & ProductsQuestion 63 of 484
A change from pH 5 to pH 7 represents how much of a change in hydrogen ion concentration?
a.100 times less acidic
b.10 times less acidic
c.2 times less acidic
d.No change
Explanation
The pH scale is logarithmic, so each whole number is a tenfold change. Two units (pH 5 to pH 7) means the solution is 10 x 10 = 100 times less acidic.
Practice all 484 questions free — no signup required.
Related questions on this topic
- On the pH scale, which value represents a neutral solution at room temperature?
- What is the approximate natural pH range of healthy hair and skin?
- Sodium hydroxide hair relaxers (commonly called 'lye relaxers') typically have a pH of approximately:
- Which statement best describes a 'no-lye' relaxer compared to a 'lye' relaxer?
- Which chemical bond is broken when hair is permanently waved or relaxed?
- In a cold permanent wave, which chemical acts as the reducing agent that breaks disulfide bonds?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California Board of Barbering & Cosmetology Exam · How we review