Biology Today and Tomorrow without Physiology (MindTap Course List)
5th Edition
ISBN: 9781305117396
Author: Cecie Starr, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 2, Problem 3FIO
Figure 2.12 A pH scale.
Here, red dots signify hydrogen ions (H+) and blue dots signify hydroxyl ions (OH–). Also shown are the approximate pH values for some common solutions.
This pH scale ranges from 0 (most acidic) to 14 (most basic). A change of one unit on the scale corresponds to a tenfold change in the amount of H+ ions.
Photos, © JupiterImages Corporation.
Figure It Out: What is the approximate pH of cola?
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(the pic cut off but this is shown below) (answer full question)Select all the pH values at which the charged form of the R group would predominate.* 2.2* 12.4* 6.2* 10.5
A base
a. has a value below 7 on the pH scale.
b. is a chemical that adds hydrogen ions to a solution.
c. has a value of 7 on the pH scale.
d. is a chemical that absorbs hydrogen ions from a solution.
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.
Chapter 2 Solutions
Biology Today and Tomorrow without Physiology (MindTap Course List)
Ch. 2 - A. The first shell corresponds to the first energy...Ch. 2 - B. A chlorine atom (Cl) becomes a negatively...Ch. 2 - Figure 2.12 A pH scale. Here, red dots signify...Ch. 2 - Figure 2.17 Fatty acids. Double bonds in the tails...Ch. 2 - Effects of Dietary Fats on Lipoprotein Levels...Ch. 2 - Effects of Dietary Fats on Lipoprotein Levels...Ch. 2 - Effects of Dietary Fats on Lipoprotein Levels...Ch. 2 - Prob. 1SQCh. 2 - Which element has only one proton?Ch. 2 - The mutual attraction of opposite charges holds...
Ch. 2 - A salt does not release __________ in water. a....Ch. 2 - A(n) _______ substance repels water. a. acidic b....Ch. 2 - When dissolved in water, a(n) _____ donates H+ and...Ch. 2 - _________ is a monosaccharide. a. Glucose b....Ch. 2 - Unlike saturated fatty acids, the tails of...Ch. 2 - Which of the following is a class of molecules...Ch. 2 - Prob. 10SQCh. 2 - Prob. 11SQCh. 2 - Prob. 12SQCh. 2 - Prob. 13SQCh. 2 - Match the molecules with the best description.Ch. 2 - Match each molecule with its component(s).Ch. 2 - Alchemists were the forerunners of modern-day...Ch. 2 - Prob. 2CTCh. 2 - Polonium is a rare element with 33 radioisotopes....Ch. 2 - In the following list, identify the carbohydrate,...
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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 is the most basic? A. Group of answer choices B. Ocean water (pH 8) C. Baking soda (pH 9) D. Drano (pH 14) E. Vinegar (pH 3) F. Pure coffee (pH 5)arrow_forwardA solution with pH 4 has __________ the H+ concentration of pH 8.arrow_forward
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- A solution with a pH of 2 than a solution with a pH of 8.a. has less H+b. has more H+c. has more OH−arrow_forwardan atom whose number of electrons does not equal its number of protons is called... ion isotope compound elementarrow_forwardYou have two beakers. One contains pure water, the other contains pure methanol (wood alcohol). The covalent bonds of methanol molecules are nonpolar, so there are no hydrogen bonds among methanol molecules. You pour crystals of table salt (NaCl) into each beaker. Predict what will happen. A) Equal amounts of NaCl crystals will dissolve in both water and methanol. B) NaCl crystals will NOT dissolve in either water or methanol. C) NaCl crystals will dissolve readily in water but will not dissolve in methanol. D) NaCl crystals will dissolve readily in methanol but will not dissolve in water. E) When the first crystals of NaCl are added to water or to methanol, they will not dissolve; but as more crystals are added, the crystals will begin to dissolve faster and faster.arrow_forward
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