Milady Chapter 6 Exam Chemistry And Chemical Safety Questions And Answers

The pH scale goes from 0 to 14 W/ _________ being neutral. {Ans: 7 (seven)}Physical properties of a substance include ___________. {Ans: Color, odor and weight, density and specific gravity, melting point, boiling point and hardness}Which of these is an example of a W/O emulsion? {Ans: Cold cream}A pH of 10 is ______ more alkaline than a pH of 7. {Ans: 1,000 times}The two types of chemical reaction that are important to estheticians are ________________. {Ans: Acid-alkali neutralization reactions and oxidation reduction (redox) reactions}On a pH scale, a change of one whole number: {Ans: Represents a tenfold change in pH}When water becomes ice, it: {Ans: Undergoes a physical change}The lightest element on earth is: {Ans: Hydrogen}Which of the following accurately describes a liquid state of matter? {Ans: Definite size, but not definite shape}In an oil-in-water emulsion ___________. {Ans: Droplets of oil are dispersed in water}Anything below 7 on the PH scale is considered: {Ans: Acidic}Suspensions are made of _________ of two or more substances. {Ans: Uniform mixtures}A chemical change is a change in the __________________. {Ans: Chemical composition of a substance}Immiscible substances are: {Ans: Not mutually