Human Biology Custom Edition
11th Edition
ISBN: 9781337631532
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 2, Problem 5CT
Manufacturers make carbonated drinks by forcing pressurized carbon dioxide gas into flavored water. A
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An important buffer system in the human body involves carbon dioxide (CO2), carbonic acid (H2CO3), and bicarbonate ions (HCO3-) as shown: If a person becomes excited and exhales large amounts of CO2, how will his or her body’s pH be affected?
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.
Adding HCO3 to a solution will cause the concentration of H* to
- and the pH to.
Select one:
O a. increase; increase
O b. increase; decrease
O c. decrease; increase
O d. decrease; decrease
O e. HCO3 has no effect on H* concentration
Chapter 2 Solutions
Human Biology Custom Edition
Ch. 2 - Distinguish between an element, an atom, and a...Ch. 2 - Explain the difference between an ionic bond and a...Ch. 2 - Ionic and covalent bonds join atoms into...Ch. 2 - Name three vital properties of water in living...Ch. 2 - Which small organic molecules make up...Ch. 2 - Which of the following is the carbohydrate, the...Ch. 2 - Describe the four levels of protein structure. How...Ch. 2 - Distinguish among the following: a....Ch. 2 - The backbone of organic compounds forms when...Ch. 2 - A carbon atom can form up ________ to bonds with...
Ch. 2 - All of the following except ________ are building...Ch. 2 - Prob. 4SQCh. 2 - Prob. 5SQCh. 2 - Prob. 6SQCh. 2 - Which phrase best describes what a functional...Ch. 2 - In ________ reactions, small molecules are linked...Ch. 2 - Match each type of molecule with its description....Ch. 2 - What kinds of bonds often control the shape (or...Ch. 2 - The pH of black coffee is 5, and that of milk of...Ch. 2 - Draw a shell model of an uncharged nitrogen atom....Ch. 2 - Prob. 3CTCh. 2 - Manufacturers make carbonated drinks by forcing...
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- Name three vital properties of water in living cells.arrow_forwardtwo of these statements are truths and one is a lie. Which of the following statements is a lie? a. The concept of pH is exclusive of how buffers work. b. Salts dissociate into ions (except H+ and OH-) when dissolved in water. c. ATP stores a large amount of potential energy.arrow_forwardMark the following statements as true or false. If a statement is false, correct it to make a true statement. a. Acids dissociate in water to give hydrogen ions and an anion. b. Bases are defined as hydrogen ion donors. c. As a solution’s pH rises, it becomes more acidic. d. A buffer is a system of chemicals that resists a change in pH. e. A solution with a pH of 10 has more hydrogen ions than a solution with a pH of 2.arrow_forward
- A solution at pH 7 is considered neutral because (a) its hydrogen ion concentration is 0 mol/L (b) its hydroxide ion concentration is 0 mol/L (c) the product of its hydrogen ion concentration and its hydroxide ion concentration is 0 mol/L (d) its hydrogen ion concentration is equal to its hydroxide ion concentration (e) it is nonpolararrow_forwardPure water has a pH of 7, the point at which the concentrations of hydrogen ions and hydroxide ions are equal and water is considered to have neutral pH. If an acid is added to water, the pH value because the acid releases goes up above 7 ; hydrogen ions goes down below 7; hydrogen ions goes up above 7; hydroxide ions goes down below 7 ; hydroxide ionsarrow_forwardWhich of the following substances will dissolve in water A.nonpolar B.polar C.hydrophobic D.hydrophilic E.ionicarrow_forward
- what is the correct answer ง The two possible states of a substance in water, dissolved (D) and undissolved (U), are depicted in the PEC diagram below. What is true about this substance? Ep U D # configurations Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a It is soluble in water at all temperatures b It is insoluble in water at all temperatures C It is soluble in water only at high temperatures d It is soluble in water only at low temperaturesarrow_forwardIn mixing compounds with water, the polarity of the compounds helps predict their solubility. When a compound's electrons are shared ; if shared unevenly, the compound is evenly, the compound is said to be .Which group dissolves more readily in waterarrow_forwardWhich has more hydrogen ions, grapefruit juice (pH = 3) or tomato juice (pH more or less? tomato, 10x more; O tomato, 10x less; O grapefruit, 10x more; O grapefruit, 10x less; = 4) and how mucharrow_forward
- Which of the following liquid substances exhibit the highest viscosity at 25 ºC? A. H3C−(CH2)4−CH2OH (hexanol) B. H3C−(CH2)3−CH2OH (pentanol) C. H3C−(CH2)4−COOH (hexanoic acid) D. All of the above have equal viscosities.arrow_forwardAn aqueous solution contains 0.34 M potassium cyanide. One liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) 0.34 mol HCI04 0.16 mol NaOH 0.33 mol KCIO4 0.16 mol HCIO4 0.33 mol HCNarrow_forwardBoth pleasearrow_forward
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