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Chapter 3 Test Bank AP Bio

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Campbell's Biology, 9e (Reece et al.) Chapter 3 Water and Life Life evolved in the ocean, and the chemistry of life occurs in an aqueous environment. These questions explore the properties of water that are important to sustain life?s chemical processes, organismal physiology, and interactions of organisms with their environment. Quantitative properties such as heat content, molarity, and pH are also addressed. A few questions address how human activities affect the global environment through acid rain and acidification of the ocean. Multiple-Choice Questions 1) In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by A) hydrogen bonds. B) nonpolar covalent bonds. C) polar covalent bonds. D) ionic bonds. E) van der Waals interactions.

Campbell Biology Chapter 3 outline

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CHAPTER 3 ? WATER AND LIFE THE MOLECUES THAT SUPPORT ALL OF LIFE Water is the only natural substance to exist in all 3 states of matter: Solid Liquid Gas WATER molecule is a polar molecule It has a positive and a negative end It can make up to 4 Hydrogen bonds that break and reform instantaneously. 4 Emergent properties of water COHESION The linking together of like molecules, often by hydrogen bonds. Water sticks to itself Adhesion- water sticks to something else Surface Tension ? A measure of how difficult it is to stretch or break the surface of a liquid. Water has a high surface tension because of the hydrogen bonding of surface molecules MODERATION OF TEMPERATURE BY WATER HEAT AND TEMPERATURE Kinetic Energy ?

biology chapter guide

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Campbell's Biology, 9e (Reece et al.) Chapter 3 Water and Life Life evolved in the ocean, and the chemistry of life occurs in an aqueous environment. These questions explore the properties of water that are important to sustain life?s chemical processes, organismal physiology, and interactions of organisms with their environment. Quantitative properties such as heat content, molarity, and pH are also addressed. A few questions address how human activities affect the global environment through acid rain and acidification of the ocean. Multiple-Choice Questions 1) In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by A) hydrogen bonds. B) nonpolar covalent bonds. C) polar covalent bonds. D) ionic bonds. E) van der Waals interactions.

pKa Chemistry Lab Report

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Pre Lab Questions: 1. H3PO4 + H20 ( H30+ + H2PO4- Ka1 = [H2PO4-][ H30+]/[ H3PO4] pH = pKa1 ??+ log [A-]/[HA] pH = -log( 7.5 x 10-3) + log (1) pH = -log( 7.5 x 10-3) pH = 2.12 Methyl Red would not be a proper indicator because the color change of this titration occurs between the pH?s of 4 and 5. The pH of the indicator should be close to the pH of the equivalence point. The indicator should change color at a pH of around 2.12, therefore, Orange IV would be the indicator to use since it changes from Orange to Peach at around a pH of 2.5. Results & Data: Experiment Table Unknown Trial pH pH (average) pKa Unknown ID C Sample #1 6.76 6.76 6.76 KH2PO4 Sample # 2 6.76 Table of Unknowns Acid Formula Ka of Conjugate Acid pKa
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