Barbering Program

Chapter 7: Chemistry & Chemical Safety

Matter, Elements, pH Scale & Chemical Safety|37 Questions|Board Exam Prep

Student Name

Date

Instructor

Score

Vocabulary Matching

Match each numbered term with the correct lettered definition.

Terms

1.Chemistry

2.Matter

3.Element

4.Atom

5.pH scale

6.Acid

7.Alkali

8.Oxidation

9.Reduction

10.SDS

Definitions

A.The smallest particle of an element that retains its properties

B.The science that deals with the composition, structure, and properties of matter

C.A substance with a pH below 7.0 that contracts and hardens the hair

D.The simplest form of chemical matter that cannot be broken down further

E.A chemical reaction involving the loss of oxygen or gain of hydrogen

F.A chemical reaction that combines a substance with oxygen

G.A measure of acidity and alkalinity on a scale from 0 to 14

H.Safety Data Sheet; a document that provides safety information about a chemical product

I.Any substance that occupies space and has mass; exists as solid, liquid, or gas

J.A substance with a pH above 7.0 that softens and swells the hair

Fill in the Blank

Complete each statement with the correct term or phrase.

Question 11Fill in the Blank

A pH of 7.0 is considered

Question 12Fill in the Blank

The pH scale ranges from to 14

Question 13Fill in the Blank

Hair and skin have a natural pH range of to 5.5, which is slightly acidic

Question 14Fill in the Blank

A chemical reaction that combines a substance with oxygen is called

Question 15Fill in the Blank

are required by OSHA to be available for every chemical product in the barbershop

Question 16Fill in the Blank

Water is known as the solvent because it dissolves more substances than any other

Question 17Fill in the Blank

An emulsion is a mixture of two substances united with the help of an emulsifier

Question 18Fill in the Blank

Chemical changes create new substances with properties from the original

Multiple Choice

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

Question 19Multiple Choice

A substance with a pH of 3.0 would be classified as:

A. A weak base

B. A strong acid

C. Neutral

D. A strong alkali

Question 20Multiple Choice

Which of the following is an example of a physical change?

A. Coloring hair

B. Perming hair

C. Cutting hair

D. Relaxing hair

Question 21Multiple Choice

The purpose of a Safety Data Sheet (SDS) is to:

A. List product prices

B. Provide safety and handling information for chemical products

C. Replace product labels

D. Track inventory

Question 22Multiple Choice

Hair and skin have a natural pH of approximately:

A. 7.0

B. 2.0

C. 4.5 to 5.5

D. 9.0 to 10.0

Question 23Multiple Choice

An alkali solution will cause the hair to:

A. Contract and harden

B. Soften and swell

C. Change color

D. Become oily

Question 24Multiple Choice

Which of the following is NOT a state of matter?

A. Solid

B. Liquid

C. Gas

D. Chemical

Question 25Multiple Choice

Oxidation-reduction reactions are important in barbering because they are involved in:

A. Shampooing

B. Haircoloring and chemical texture services

C. Haircutting

D. Blow-drying

Question 26Multiple Choice

The smallest particle of an element that still retains its chemical properties is:

A. A molecule

B. A compound

C. An atom

D. An ion

True / False

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

Question 27True / False

Pure water has a pH of 7.0, making it neutral.

Question 28True / False

Chemical changes can be reversed by physical means.

Question 29True / False

OSHA requires that Safety Data Sheets be available in the barbershop for all chemical products used.

Question 30True / False

Hair products with a high alkaline pH are gentle on the hair and scalp.

Question 31True / False

An emulsion requires an emulsifier to keep two immiscible liquids blended together.

Question 32True / False

Elements are the most complex form of matter.

Question 33True / False

Oxidation reactions always involve the addition of oxygen or the loss of hydrogen.

Question 34True / False

Acids have a pH above 7.0 on the pH scale.

Short Answer

Answer each question in 2-3 complete sentences.

Question 35Short Answer

Explain the pH scale and describe why understanding pH is important for a barber when selecting hair care and chemical service products.

Question 36Short Answer

What is the difference between a physical change and a chemical change? Provide an example of each that relates to barbering.

Question 37Short Answer

Describe the purpose of Safety Data Sheets (SDS) and explain why OSHA requires them in professional barbershops.