pH and Redox
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![Page 1: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/1.jpg)
pH and Redox
![Page 2: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/2.jpg)
2. Hair will dissolve completely___.1. in a very strong acid only2. in a very strong base only3. in either a strong acid or a strong base4. even in a very weak acid5. in an acid or a base of ANY strength
![Page 3: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/3.jpg)
3. A sample of pure water contains ___.
1. more OH – ions than H+ ions2. more H+ ions than OH – ions3. only H2O molecules and NO ions of any
kind4. equal numbers of OH – and H+ ions5. only H+ ions and NO OH – ions
![Page 4: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/4.jpg)
4. A pH of 1.0 or 2.0 BEST represents ___.
1. a strong acid2. a weak acid3. a strong base4. a weak base5. a neutral solution
![Page 5: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/5.jpg)
5. When a substance has had its pH adjusted to that of hair or skin it is advertised as being ___.
1. alkaline2. acidic3. neutral4. pH balanced5. a detergent
![Page 6: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/6.jpg)
6. Mildly acidic solutions ___1. cause the hair to dissolve2. are good for cleaning the hair3. should never be used on the hair4. cause the hair’s cuticle to swell5. make the hair’s cuticle smooth
![Page 7: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/7.jpg)
7. What portion of a strand of hair would have the lowest pH?
1. nearest to the scalp2. nearest to the end3. about in the middle between
the scalp and the end4. This is a trick! Hair is solid
and has no pH value!!
![Page 8: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/8.jpg)
8. In order to check the pH of a substance that substance must contain ___.
1. dry mixtures2. combustible mixtures3. water4. acid5. viscous mixtures
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9. On the pH scale, neutral ___.
1. is pH 02. is pH 73. is pH 144. different for every substance5. occurs when there is more H+ than OH –
![Page 10: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/10.jpg)
10. An acid ___. 1. Might have a pH of 102. Could be used to
neutralize pure water3. could be used to
neutralize a base4. Could be used to
neutralize something that was alkaline
5. Both 3 and 4 are correct
![Page 11: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/11.jpg)
11. A solution becomes more basic as ___.
1. the OH – ion concentration decreases2. the OH – ion concentration increases3. the H+ ion concentration increases4. the alkalinity decreases5. None of the above are correct.
![Page 12: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/12.jpg)
12. Hair has a pH of about 14.
1. TRUE2. FALSE
![Page 13: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/13.jpg)
13. A substance that has gained oxygen or lost hydrogen has been:
1. neutralized2. atomized3. oxidized4. reduced5. buffered
![Page 14: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/14.jpg)
14. A product that has been pH balanced to match the skin’s pH ___.
1. will definitely cause an allergic reaction.2. will definitely not cause an allergic reaction.3. may still cause an allergic reaction.
![Page 15: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/15.jpg)
15. The pH of healthy, normal skin is:1. very basic2. very alkaline3. very acidic4. a little acidic to a little basic5. Both 1 and 2 are correct
![Page 16: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/16.jpg)
16. pH is actually an abbreviation for ___.
1. plenty of hydrogen2. plenty of hydroxide3. positive health4. potential hydroxide5. potential hydrogen
![Page 17: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/17.jpg)
17. Ammonium thioglycolate is a commonly used ___.
1. oxidizing agent2. reducing agent3. buffer4. acid5. None of the above
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28. The sulfur bonds of hair are very sensitive to changes in pH between 2 and 9.
1. TRUE2. FALSE
![Page 19: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/19.jpg)
19. A buffer is ___.
1. someone who will get between you and a friend when you have a fight
2. something that changes pH
3. something that decreases pH
4. something that resists changes in pH
5. something that increases pH
![Page 20: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/20.jpg)
20. A solution with a pH of 10 is ___ times less acidic than a solution with a pH of 6.
1. 102. 1003. 1,0004. 10,0005. 100,000
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21. A solution is basic when ___.
1. OH – concentration is greater than H+ concentration2. OH – concentration is less than H+ concentration3. OH – concentration is equal to the H+ concentration4. OH – concentration is at zero5. OH – concentration has been neutralized
![Page 22: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/22.jpg)
22. A neutralization reaction is a reaction in which ___.
1. Combustion occurs2. Only oxidation occurs3. Only reduction occurs4. Water ionizes5. And acid and a base cancel each other out
![Page 23: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/23.jpg)
23. Bleaching, coloring, permanent waving and straightening all depend on ___.
1. the weather2. oxidation-reduction reactions3. combustion reactions4. the size of the dye molecules5. the will of the stylist
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24. When a reaction releases heat it is said to be ___.
1. heterogeneous2. homogeneous3. exothermic4. endothermic5. thermophilic
![Page 25: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/25.jpg)
25. Perborate and persulfate are both ___.
Sodium perborate
1. reducing agents2. oxidizing agents3. alkalizing agents4. double agents5. secret agents
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26. Hair Relaxers tend to have ___ pH numbers.
1. acidic2. very small3. neutral4. very large5. nonexistent
![Page 27: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/27.jpg)
27. Hair has no buffering capacity since it is not covered by the acid mantle and is, therefore, more apt to be damaged by changes in pH.
1. TRUE2. FALSE
![Page 28: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/28.jpg)
28. When an acid and a base are mixed the products are always salt and water. This type of reaction is called a(n)___ reaction.
1. combustion2. neutralization3. ionization4. Acid5. Base
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29. A substance with a pH of 5 is __ times more basic than a substance with a pH of 4.
1. 202. 1003. 104. 1,0005. 15
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30. ___ is the hydronium cation.1. O+
2. H3O+
3. OH+
4. OH – 5. H –
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31. Which of the following represents an anion?1. NH3
2. H+
3. CO32+
4. OH – 5. any charged atom or molecules
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32. The chemical equation shown below correctly represents ___.
H2O → H+ + OH –
1. a neutralization reaction2. the formation of a hydrogen peroxide3. a reaction in which salt and water are the
products (formed)4. nothing5. the ionization of water
![Page 33: pH and Redox](https://reader030.fdocuments.net/reader030/viewer/2022032709/56813099550346895d967a4f/html5/thumbnails/33.jpg)
33. A combustion reaction is the rapid ___ of a substance accompanied by heat and light.
1. neutralization2. ionization3. oxidation
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34. The pH scale is ___ which means it increases by multiples of 10.
10 x 10 = 100 100 x 10 = 1,000 1,000 x 10 = 10,000 10,000 x 10 = 100,000 etc.
1. Algebraic2. Geometric3. Mathematic4. Logarithmic
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34. The H+ concentration of an acid is ___ the H+ concentration of pure water
1. greater than2. less than 3. equal to