Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Textbook Question
Chapter 18.1, Problem 8CC
A saline solution is exposed to a mixture of nitrogen gas and hydrogen gas in which PH2 = PN2 What information do you need to predict whether equal amounts of H2 and N2 dissolve in the solution?
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pH expresses the molar concentration of hydronium ions in an
aqueous solution on a logarithmic scale. (Note that it is
common to use the hydrogen ion, H*, to represent the
hydronium ion, H3O+.)
pH = -log[H3O+]
[H3O+] = 10-PH
As pH decreases, acidity increases. As pH increases, acidity
decreases.
• Acidic solution: pH 7
Part A - Calculating pH
Submit
[H₂0+] 1
Acidic
pH 01
10¹ 102 103 104 105 106 107 108 109 10-10 10-11 10-12 10-13 10-14
stomach
acid
3
wine
lemon tomatoes
juice
vinegar,
black
soft drinks, coffee
beer
6
Neutral
urine
milk
7
human
blood
pure
water
sea-
water
baking
soda
10 11 12 13 14
milk
of
magnesia house-
hold
ammonia
oven
cleaner
Basic
household
bleach
Adapted from Biological Science by Freeman ©2008 Pearson Education, Inc.
What is the pH of an aqueous solution with the hydronium ion concentration
[H3O+] = 2 x 10-14 M?
Make sure that your answer has the correct number of significant figures. For help determining the correct number of significant figures, see Hint 3.
►…
An 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 HCN
Which of the following combinations would be the best choice to buffer the pH of a solution at approximately 7?
Ionization Constants for Aqueous Weak Acids at 25 °C
Acid K. (pK,)
Conjugate Base
Hydrogen phthalate ion,
Cg H4(CO2H)(CO2)
Acetic acid, CH3 CO,H Acetate ion, CH; CO2- 1.8 x 10-5 (4.74)
Weak Acid
Phthalic acid,
C6 H4 (CO,H)2
1.3 x 10-3 (2.89)
Dihydrogen phosphate Hydrogen phosphate
ion, H2 PO4
Hydrogen phosphate
ion, HPO42
6.2 x 10-8 (7.21)
ion, HPO,2-
Phosphate ion, PO,*
3.6 x 10-13 (12.44)
O Na, HPO4 and NagPO4
O NaH2 PO4 and NazHPO4
O H;PO4 and NaH2 PO4
Chapter 18 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 18.1 - Cellular metabolism review: which of the following...Ch. 18.1 - Why doesnt the movement of oxygen from the alveoli...Ch. 18.1 - If nitrogen is 78% of atmospheric air, what is the...Ch. 18.1 - At the summit of Mt. Everest, an altitude of 8850...Ch. 18.1 - Prob. 5CCCh. 18.1 - If alveolar ventilation increases, what happens to...Ch. 18.1 - True or false? Plasma with a PO2 of 40 mm Hg and a...Ch. 18.1 - A saline solution is exposed to a mixture of...Ch. 18.2 - Can a person breathing 100% oxygen at sea level...Ch. 18.2 - What effect does hyperventilation have on the...
Ch. 18.2 - A muscle that is actively contracting may have a...Ch. 18.2 - How would an obstruction of the airways affect...Ch. 18 - List five factors that influence the diffusion of...Ch. 18 - Prob. 2RQCh. 18 - Prob. 3RQCh. 18 - Describe the structure of a hemoglobin molecule....Ch. 18 - Prob. 5RQCh. 18 - Describe the chemoreceptors that influence...Ch. 18 - Describe the protective reflexes of the...Ch. 18 - What causes the exchange of oxygen and carbon...Ch. 18 - List five possible physical changes that could...Ch. 18 - Concept map: Construct a map of gas transport...Ch. 18 - Prob. 11RQCh. 18 - Prob. 12RQCh. 18 - Prob. 13RQCh. 18 - Define hypoxia, COPD, and hypercapnia.Ch. 18 - Why did oxygen-transporting molecules evolve in...Ch. 18 - Draw and label the following graphs: a. the effect...Ch. 18 - Prob. 17RQCh. 18 - Prob. 18RQCh. 18 - Create reflex pathways (stimulus, receptor,...Ch. 18 - Prob. 20RQCh. 18 - Which person carries more oxygen in his blood? a....Ch. 18 - What would happen to each of the following...Ch. 18 - In early research on the control of rhythmic...Ch. 18 - Prob. 24RQCh. 18 - Prob. 25RQCh. 18 - Prob. 26RQCh. 18 - Prob. 27RQCh. 18 - Prob. 28RQCh. 18 - Adolph Fick, the nineteenth-century physiologist...Ch. 18 - Prob. 30RQ
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