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Acids

CHEM 1A midterm 2

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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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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 6 4 Caffeine 8 8 Total 100 Useful Equations and Constants: pH = - log[H+] pX = - log X X = 10-pX Kw = 1?10-14 at 25?C PV = nRT ][ ][ log HA A pKpH a ?

Acids and Bases

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Unit 7: Acid and Bases Acid Base Lemonade Dressing Vinegar Drain-0 Arm-n-Hammer Arrhenius Acids: When in a solution, they donate protons (H+) A proton in water becomes a ?hydronium? ion H3) SameEx) HCL (aq) H+(aq) + Cl-(aq) HCl(l) + H2) H30+(aq) + Cl- Acids cause indicators to change color (Table M) Ex) Bromthymol blue, litmus, phenolphthalein Sour Taste (ex. Citric acid) pH<7 (0-7) (pure acid 100%) Measure of H+ concentration p= power (pH. If [H+} = 1 X 10-7 All acids dissolve metal to produce H2 gas (corrosive) chemically dissolve A neutralization reaction occurs b/t an acid and a base to form a salt and water Arrhenius Base: When in a solution, they donate hydroxide ions (OH-) to the solution

acid rain

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Name: ________tyler antebi___________________________ Pg.___1 Mrs. Strype - 8 Acid Rain Internet Activity Sulfur dioxide and nitrogen oxides from the burning of fossil fuels react with water and oxygen to form acids. Rainwater is naturally slightly acidic, but this additional acid makes it even more so. Acid rain harms wildlife and upsets the balance of an ecosystem. In this activity, you'll learn what acid rain is and how you can help reduce it. Go to the website What is Acid Rain? What's the definition of acid rain? Acid rain is referring to a mixture of wet and dry materials from the atmosphere containing high amounts acid. Compare wet and dry deposition. Wet Acidic rain, Snow, Fog Acids fall in types of wet or moist weather. Dry Dust, Smoke

acid rain

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Name: ________tyler antebi___________________________ Pg.___1 Mrs. Strype - 8 Acid Rain Internet Activity Sulfur dioxide and nitrogen oxides from the burning of fossil fuels react with water and oxygen to form acids. Rainwater is naturally slightly acidic, but this additional acid makes it even more so. Acid rain harms wildlife and upsets the balance of an ecosystem. In this activity, you'll learn what acid rain is and how you can help reduce it. Go to the website What is Acid Rain? What's the definition of acid rain? Acid rain is referring to a mixture of wet and dry materials from the atmosphere containing high amounts acid. Compare wet and dry deposition. Wet Acidic rain, Snow, Fog Acids fall in types of wet or moist weather. Dry Dust, Smoke

SAT Chem Orgo

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Carbon and Organic Chemistry Carbon?Three allotropic forms: Diamond, graphite, and amorphous Fullerens?New allotropic form of carbon?Near sperical cages of carbon atoms Diamond?Close-pakced crystal structure that gives a property of extreme hardness Carbon?Bonded to four other carbons in a tetraheral arragement Almost endless number of covalent ponds All bonds in this structure are equally strong, therefore very hard and notriously difficult to melt Diamond?Melting point at 3,550 degrees celsius. Synthetic diamonds can be made by putting carbon to extremely high pressurs and temperature Graphite form is made up of planes of hexagonal structures that are wealkly bonded to the planes above and below?Explains the slippery feeling of graphite

Chapter 16 Powerpoint

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Acid-Base Equilibria Priyal Patel 0 period 16.1 Acids and Bases: A Brief Review Acids have a sour taste and cause certain dyes to change color Sour taste Linked to H+ ions Bases are bitter and feel slippery Bitter taste Feel slippery Linked to OH- ions When acids and bases are mixed in certain proportions, their characteristics disappear altogether 16.2 Bronsted-Lowry Acids and Bases Danish Chemist Johannes Bronsted and English chemist Thomas Lowry proposed a definition of acids and bases Based on the fact that acid-base reactions involve the transfer of H+ ions from one substance to another. The H+ Ion in Water An H+ is a proton with no surrounding valence electrons This proton bonds interacts with nonbonding electrons of water molecules to form hydrated hydrogen ions.

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 ?

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