Human Biology: Concepts and Current Issues
7th Edition
ISBN: 9780321821652
Author: Michael D. Johnson
Publisher: Benjamin Cummings
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Textbook Question
Chapter 2, Problem 5TY
Which of the following substances has the lowest hydrogen ion concentration?
a. water (pH 7)
b. bleach (pH 13)
c. baking soda (pH 9)
d. vinegar (pH 3)
e. black coffee (pH 5)
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Chapter 2 Solutions
Human Biology: Concepts and Current Issues
Ch. 2 -
1. Who do you think should be responsible for...Ch. 2 - Prob. 2QCCh. 2 - Describe the electrical charges and relative...Ch. 2 -
2. Explain why two atoms of hydrogen tend to...Ch. 2 -
3. Explain why polar and charged molecules tend...Ch. 2 - How is a covalent bond different from an ionic...Ch. 2 - Compare and contrast potential energy and kinetic...Ch. 2 - Distinguish between saturated and unsaturated...Ch. 2 - Describe the process known as dehydration...Ch. 2 - Explain why proteins come in an almost unlimited...
Ch. 2 -
9. Discuss the importance of enzymes in living...Ch. 2 -
10. Describe the role of ATP in energy transfer...Ch. 2 - If a molecule of starch is repeatedly hydrolyzed,...Ch. 2 - Which of these molecules would be described as...Ch. 2 -
3. _______bonds form between the oxygen and...Ch. 2 - 13C and 14C are ______ of carbon. a. isotopes b....Ch. 2 - Which of the following substances has the lowest...Ch. 2 - When sugar is dissolved in water, sugar is the...Ch. 2 - A monosaccharide is to a polysaccharide as an...Ch. 2 -
8. Which of these bonds is the easiest to...Ch. 2 -
9. The primary structure of a protein is...Ch. 2 -
10. DNA ultimately contains the instructions for...Ch. 2 - If one strand of DNA has the sequence...Ch. 2 - Which of the following is true regarding the...Ch. 2 -
13. Which of the following is true regarding...Ch. 2 - Synthesis of proteins requires the input of...Ch. 2 - Prob. 15TYCh. 2 - Prob. 1AWKCh. 2 - Prob. 2AWKCh. 2 - Many people use cholesterol-lowering drugs to...Ch. 2 - Prob. 4AWKCh. 2 -
5. Coca-Cola is a very acidic drink; its pH is...Ch. 2 - Prob. 6AWK
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- Using a pH meter, you find the pH of an unknown solution to be 8.0. How would you describe this solution? a. weakly acidic b. strongly acidic c. weakly basic d. strongly basicarrow_forwardWhich of the following ionizes completely in solution and is considered to be a strong acid? Select one: O a. NAOH O b. HCL O c. NH3 O d. H2CO3 O e. CH3COOHarrow_forwardWhat is the isoelectric point of casein? Please choose one correct answer only. A. pH 6.6 B. pH 5.6 C. pH 4.6 D. pH 3.6 E. None of the given optionsarrow_forward
- The PH formula is given as PH=-log(H+). The H+ is the number of free ions of hydrogen. A seven PH is considered neutral. Discuss what having a low PH and a high PH means. What does a 12 PH mean? How about a 2? Which is more caustic? Is either a good thing at extremely high or low values? Explain fully as to what a PH means to you and what you use it for.arrow_forward.Which of the following substances would be considered basic? A. hydrochloric acid (pH 1.0) B. milk (pH 6.6) C. baking soda (pH 8.1) D. water (pH 7.0) E. Dr. Pepper (pH 3.0)arrow_forwardAmelia tests several substances in her house to determine their pH values and records the results. Substance pH Lemon juice 2.3 Tap water 6.7 Bleach 12.3 Soapy water 11.7 Can of tomatoes 4.5 Dishwasher detergent 10.9 What do the basic substances have in common? A They are all used in cooking. B They are all used in cleaning products. C They are all clear or transparent. D They are all sour tasting when eaten.arrow_forward
- Which of the following statements is true? a. Acids and bases cannot mix together. b. Acids and bases will neutralize each other. c. Acids, but not bases, can change the pH of a solution. d. Acids donate hydroxide ions (OH–); bases donate hydrogen ions (H+).arrow_forwardThe acidity of our skin (pH~4.5-5.5) helps maintaining the skin's cells and prevents the growth of some microbes. Therefore, its always recommended to use gentle skin soap to maintain the acidity of the skin, these products contain mainly: Select one: a. Strong acid to maintain the pH of the skin O b. Weak acid to significantly decrease the pH of the skin O c. Weak base to maintain the pH close to 7 O d. Weak base to increase the pH of the skin O e. Weak acid to maintain the pH of the skin In which of the following do you expect to have highest emergent properties? Select one: O a. Tissue O b. Community Oc. Cell O d. population O e. Organismsarrow_forwardBicarbonate ion (HCO3) is a type of the following: O a. Acid O b. Base O c. Buffer O d. Salt Oe. None of the Abovearrow_forward
- You made a buffer solution by combining 250.0 mL of a 0.20 M sodium acetate solution with 50.0 mL of 1.0 M acetic acid (pka = 4.7). To this solution you then add 100.0 mL of 0.25 M NaOH. What is the final pH of the resulting solution?arrow_forwardDefine the following terms:a. acidb. basea. weak acidd. weak basee. conjugate basearrow_forwardWhich of the following substances will dissolve in water A.nonpolar B.polar C.hydrophobic D.hydrophilic E.ionicarrow_forward
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