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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.

Acid and Base Lab (unanswered)

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Litmus

PH

Sodium

health

Technology

Name:______________________________________ Data EXPERIMENT 1 Litmus Paper ? COLOR CHANGE ? HYDROCLORIC ACID SODIUM HYDROXIDE RED LITMUS PAPER ? ? BLUE LTIMUS PAPER ? ? EXPERIMENT 2 Cabbage Indicator ? COLOR CHANGE AFTER 5 DROPS COLOR CHANGE AFTER 10 DROPS TEST TUBE 1 ? ? CABBAGE INDICATOR W/ HYDROCHLORIC ACID ? ? ? TEST TUBE 2 ? ? CABBAGE INDICATOR W/ SODIUM HYDROXIDE EXPERIMENT 3 Neutralization Reaction Describe what color changes you observed as you combined the content of the two test tubes. EXPERIMENT 4 Hydrion Paper ? COLOR CHANGE pH HYDROCHLORC ACID ? ? SODIUM HYDROXIDE ? ? CARBONC ACID (SELTZER WATER) ? ? ACETIC ACID (VINEGAR) ? ? MAGNESIUM HYDROXIDE & ALUMINUM HYDROXIDE

campbell_ap_bio_practice_test_ch3

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PH

Chapter?3 Water?and?the?Fitness?of?the?Environment 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. Answer: C Topic: Concept?3.1 Skill: Knowledge/Comprehension 2) The?slight?negative?charge?at?one?end?of?one?water?molecule?is?attracted?to?the?slight?positive?charge?of?another water?molecule.?What?is?this?attraction?called? A) a?covalent?bond B) a?hydrogen?bond C) an?ionic?bond D) a?hydrophilic?bond E) a?hydrophobic?bond Answer: B Topic: Concept?3.1 Skill: Knowledge/Comprehension 3) An?example?of?a?hydrogen?bond?is?the?bond?between A) C?and?H?in?methane?(CH4).

properties of water

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intermolecular forces

PH

1 Name _______________________________ Date _________________ Period _________ Extraordinary properties of Water ppt Questions 1. What is the formula for a molecule of water? 2. Which atom in water attracts more negative electrons? 3. Water is a ________________ molecule because it has an equal number of ________________ and ___________________. 4. What is water?s net charge? 5. Water is called a _______________ molecule because the oxygen end ?acts? _____________ charged and the hydrogen end ?acts? _______________ charged. 6. One hydrogen bond is ____________, but many hydrogen bonds are ____________. 7. How do hydrogen bonds form? PROPERTIES OF WATER 8. At sea level, water boils at _______________ and freezes at ____________.

Campbell Biology Chapter 3 Study Guide

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Properties of water

Hydronium

PH

Hydrogen bond

Acid

Name Period Chapter 3: Water and Life Concept 3.1 Polar covalent bonds in water result in hydrogen bonding Study the water molecules at the right. On the central molecule, label oxygen (O) and hydrogen (H). What is a polar molecule? Why is water considered polar? Now, add + and - signs to indicate the charged regions of each molecule. Then, indicate the hydrogen bonds. Explain hydrogen bonding. How many hydrogen bonds can a single water molecule form? Concept 3.2 Four emergent properties of water contribute to Earth?s suitability for life Hydrogen bonding accounts for the unique properties of water. Let?s look at several. Cohesion, Adhesion, and Surface Tension Distinguish between cohesion and adhesion.

Campbell Biology Test Bank Chapter 3

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PH

Properties of water

Hydroxide

Acid

Chemical reaction

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.

CHEM 1A midterm 2 2012

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Acid dissociation constant

Acids

Methyl orange

Hydrazoic acid

PH

Chemistry 1A, Fall 2012 Midterm Exam #2 October 17, 2012 (90 min, closed book) Name:__________________________________ SID:___________________________________ GSI Name:________________ Discussion Day/Time: ________________ ? The test consists of 5 short answer questions and 22 multiple choice questions. ? Put your written answers in the boxes provided. Answers outside the boxes may not be considered in grading. ? Write your name on every page of the exam. Question Page Points Score Multiple Choice (1-22) 2-7 88 Titration Short Answer 6 Soda (1) Short Answer 4 Soda (2) Short Answer 4 Ocean Acidification Short Answer 4 Indicators Short Answer 4 Total 110

CHEM 1A midterm 2

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Acids

Acid dissociation constant

Tannic acid

Caffeine

Ammonia

PH

Buffer solution

Chemistry 1A, Fall 2011 Midterm Exam #2 October 18, 2011 (90 min, closed book) Name:__________________________________ SID:___________________________________ GSI Name:________________ ? The test consists of 4 short answer questions and 23 multiple choice questions. ? Put your written answers in the boxes provided. Answers outside the boxes will NOT be considered in grading. ? Write your name on every page of the exam. Question Page Points Score Multiple Choice 2-8 76 Cabbage juice 2 6 Kitty Litter 3 6 Nicotine 5 4 Caffeine 7 8 Total 100

CHEM 1A midterm 1 key

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Acids

Smoking