NIC Nail Technician Written ExamScientific ConceptsEasy
The pH scale measures the acidity or alkalinity of a substance. A nail product with a pH of 8 is considered:
- ANeutral
- BAlkaline
- CStrongly acidic
- DSlightly acidic
Show answer & explanationAnswer & explanation
Correct answer: B. 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). Therefore, a pH of 8 is considered alkaline.
Why the other options are wrong
- A. Neutral is a pH of 7.
- C. Strongly acidic would be a pH of 0-2.
- D. Slightly acidic would be a pH of 5-6.
pH Scale
A logarithmic scale used to specify the acidity or alkalinity of an aqueous solution.
- Ranges from 0 (most acidic) to 14 (most alkaline)
- pH 7 is neutral (e.g., pure water)
- Important for product compatibility with skin and nails
Memory trick: 7 is 'Neutral Heaven', below is 'Acid', above is 'Alkaline'.