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Basic Chem Review

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Atoms: An atom has 7 protons, 7 electrons, and 8 neutrons. Fill in the blanks below for this atom: Atomic Number _______ Mass number: _______ Charge: ________ This atom belongs to which element? Notation Atomic # Mass # # protons # neutrons # electrons Types of Bonds: Determine the Type of Bond. Hydrogen and Oxygen type of bond = __________________ Carbon and Hydrogen type of bond = __________________ Sodium and Chlorine type of bond = __________________ Solutions/Molarity Practice What is the molarity if 0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution? What is the molarity if 734 grams of lithium sulfate (Li2SO4) are dissolved to make 2500 mL of solution?

Basic Chemistry Review

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Atoms: An atom has 7 protons, 7 electrons, and 8 neutrons. Fill in the blanks below for this atom: Atomic Number _______ Mass number: _______ Charge: ________ This atom belongs to which element? Notation Atomic # Mass # # protons # neutrons # electrons Types of Bonds: Determine the Type of Bond. Hydrogen and Oxygen type of bond = __________________ Carbon and Hydrogen type of bond = __________________ Sodium and Chlorine type of bond = __________________ Solutions/Molarity Practice What is the molarity if 0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution? What is the molarity if 734 grams of lithium sulfate (Li2SO4) are dissolved to make 2500 mL of solution?

Campbell AP Bio Study Guide Chapter 3

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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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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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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).

Campbell Biology Chapter 3 Study Guide

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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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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.

ch. 4

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Chapter 4 Practice Test 1. A 20.0-g sample of HF is dissolved in water to give 2.0 ? 102 mL of solution. The concentration of the solution is: a) 1.0 M b) 3.0 M c) 0.10 M d) 5.0 M e) 10.0 M Ans: d) 5.0 M Page: 4.3 2. Which of the following aqueous solutions contains the greatest number of ions? a) 400.0 mL of 0.10 M NaCl b) 300.0 mL of 0.10 M CaCl2 c) 200.0 mL of 0.10 M FeCl3 d) 200.0 mL of 0.10 M KBr e) 800.0 mL of 0.10 M sucrose ANS: b) 300.0 mL of 0.10 M CaCl2 PAGE: 4.3 3. What mass of calcium chloride, CaCl2, is needed to prepare 2.850 L of a 1.56 M solution? a) 25.9 g b) 60.8 g c) 111 g d) 203 g e) 493 g ANS: e) 493 g PAGE: 4.3 4. What volume of 18.0 M sulfuric acid must be used to prepare 15.5 L of 0.195 M H2SO4? a) 168 mL

CHEM 1A midterm 2 2012

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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 key

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Chemistry 1A, Fall 2012 Midterm Exam #2 October 17, 2012 (90 min, closed book) Name:_____________KEY____________________ 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

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