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Cosmetology Program

Chapter 12: Salon Chemistry Essentials

Matter, Elements, pH Scale, Oxidation & Product Chemistry|37 Questions|Board Exam Prep

A

Vocabulary Matching


Match each numbered term with the correct lettered definition. Write the letter in the blank.

Terms
1.Matter
2.pH scale
3.Oxidation
4.Emulsion
5.Acid
6.Alkali
7.Redox reaction
8.Element
9.Surfactant
10.Solution
Definitions
A.Anything that occupies space and has mass
B.Basic substance that cannot be broken into simpler substances
C.Chemical reaction involving both reduction and oxidation
D.Chemical reaction when oxygen combines with another substance
E.Cleansing agent with a water-loving head and oil-loving tail
F.Measurement system from 0 to 14 indicating acidity or alkalinity
G.Mixture where one liquid is suspended in another with an emulsifier
H.Stable mixture of two or more substances that will not separate
I.Substance with pH above 7 that swells and opens the hair cuticle
J.Substance with pH below 7 that closes the hair cuticle
B

Fill in the Blank


Complete each statement with the correct term or phrase.

Question 11Fill in the Blank

Anything that occupies space and has mass is called .

Question 12Fill in the Blank

Oxygen combining with another substance is called .

Question 13Fill in the Blank

A pH of is considered neutral.

Question 14Fill in the Blank

The pH scale ranges from 0 to .

Question 15Fill in the Blank

High pH (alkaline) products and open the cuticle.

Question 16Fill in the Blank

A mixture with one liquid suspended in another is an .

Question 17Fill in the Blank

A redox reaction involves one substance losing oxygen while another it.

Question 18Fill in the Blank

Hair relaxers have a very high pH between 12 and 14.

C

Multiple Choice


Select the best answer for each board-exam style question.

Question 19Multiple Choice

The pH scale ranges from:

A. 0 to 7
B. 1 to 14
C. 0 to 14
D. 0 to 100
Question 20Multiple Choice

Which term describes liquid suspended in another with emulsifier?

A. Solution
B. Suspension
C. Emulsion
D. Colloid
Question 21Multiple Choice

A pH of 7 indicates:

A. Acidic
B. Alkaline
C. Neutral
D. Corrosive
Question 22Multiple Choice

High pH products affect hair by:

A. Closing cuticle
B. Having no effect
C. Swelling and opening cuticle
D. Darkening color
Question 23Multiple Choice

Hair conditioners typically have pH that is:

A. Neutral (7)
B. Acidic (3-5.5)
C. Alkaline (12-14)
D. Highly alkaline (14)
Question 24Multiple Choice

Which salon service relies on a redox reaction?

A. Shampooing
B. Blow drying
C. Permanent hair color
D. Roller setting
Question 25Multiple Choice

Pure water has a pH of:

A. 0
B. 3
C. 7
D. 14
Question 26Multiple Choice

Hair relaxers have pH range of approximately:

A. 3-5
B. 7-9
C. 9-11
D. 12-14
D

True / False


Write T for True or F for False in the blank.

Question 27True / False

A pH of 7 is considered neutral.

Question 28True / False

Emulsions are formed when two immiscible liquids combine with emulsifier.

Question 29True / False

The pH scale ranges from 0 to 7.

Question 30True / False

Acidic products open and swell the hair cuticle.

Question 31True / False

Oxidation involves oxygen combining with another substance.

Question 32True / False

Hair conditioners are typically alkaline with high pH.

Question 33True / False

A redox reaction involves both reduction and oxidation.

Question 34True / False

Understanding pH helps cosmetologists know why products work.

E

Short Answer


Answer each question in 2-3 complete sentences.

Question 35Short Answer

Why is understanding pH important for chemical services?

Question 36Short Answer

Explain what a redox reaction is with a salon service example.

Question 37Short Answer

Match each pH value to its product: pH 3, pH 7, pH 9, pH 13.