NIC Nail Technician Written ExamScientific ConceptsEasy
A technician is using a chemical product with a pH of 10. According to the pH scale, how would this product be classified?
- AAlkaline
- BWeakly acidic
- CStrongly acidic
- DNeutral
Show answer & explanationAnswer & explanation
Correct answer: A. Alkaline
The pH scale ranges from 0 to 14. A pH of 7 is neutral. Values below 7 are acidic, and values above 7 are alkaline (or basic). A pH of 10 falls within the alkaline range.
Why the other options are wrong
- B. Weakly acidic substances have a pH between 4 and 6.
- C. Strongly acidic substances have a pH typically between 0 and 3.
- D. Neutral substances have a pH of 7.
pH Scale Classification
The pH scale measures acidity or alkalinity; 0-6 is acidic, 7 is neutral, and 8-14 is alkaline (basic).
- Logarithmic scale from 0 to 14.
- Lower pH = more acidic, higher pH = more alkaline.
- Important for product safety and efficacy.
Memory trick: Seven is neutral, below is sour, above is bitter.