Esthetician Practice Esthetics Chemistry and Ingredients Questions and Answers

Question 1

The skin's natural acid mantle, which protects against bacterial growth and moisture loss, has an approximate pH of:

Accepted Answer

4.5 to 5.5

Answer

7.0

Answer

8.0 to 9.0

Answer

2.5 to 3.5

Question 2

A client with dehydrated skin is looking for a serum to help bind moisture to their epidermis. Which of the following ingredients is classified as a humectant and would be most effective for this purpose?

Accepted Answer

Hyaluronic Acid

Answer

Petrolatum

Answer

Shea Butter

Answer

Jojoba Oil

Question 3

A client is concerned about environmental damage and wants to incorporate products that protect against free radicals. Which of the following ingredient categories should an esthetician recommend?

Accepted Answer

Antioxidants

Answer

Surfactants

Answer

Emollients

Answer

Alpha Hydroxy Acids

Question 4

In cosmetic chemistry, what is the primary role of a surfactant in a facial cleanser?

Accepted Answer

To enable oil and water to mix, thereby lifting dirt and sebum.

Answer

To provide a physical scrubbing action for exfoliation.

Answer

To thicken the product to a gel-like consistency.

Answer

To deliver vitamins and nutrients deep into the dermis.

Question 5

An esthetician is choosing an exfoliant for a client with oily, congested skin and blackheads. Which acid is oil-soluble, allowing it to penetrate into the pore to dissolve sebum and debris?

Accepted Answer

Salicylic Acid

Answer

Glycolic Acid

Answer

Lactic Acid

Answer

Mandelic Acid

Question 6

A cosmetic cream that is a stable mixture of two or more immiscible substances, such as oil and water, held together by a binder is known as a(n):

Accepted Answer

Emulsion

Answer

Solution

Answer

Suspension

Answer

Tincture