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Chemistry

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AP Chemistry
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SI System of Measurement

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Chemistry
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SI System of Measurement Why use the SI System? 1. Worldwide International System of measurement adopted in 1960, updated metric system 2. Convenient decimal system, uses multiples of 10 (like US currency) Qualitative vs. quantitative measurement: 1. qualitative relative comparison between two objects (e.g., height of desk vs. chair) 2. quantitative fixed measurement based on accepted standard, uses numbers and units Base vs. derived units: 1. base unit measured directly (e.g., length, mass) 2. derived unit calculated from base measurements (e.g., volume, density) Pass out rulers to class? Common SI Units Quantity SI unit Symbol Other units (metric) Symbol Instrument Length Meter* m ruler Mass Kilogram* kg balance Temperature Kelvin* K

Crystallization

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-Pilot Plant FT-IR Setup we want to: 1) maximize chemical yield 2)and maximize purity of product -crystallization is a good way to increase purity Experiment 2-Crystallization Remove insoluble impurities by filtration. -let it cool down and then filter off product
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Crystallization

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-Pilot Plant FT-IR Setup we want to: 1) maximize chemical yield 2)and maximize purity of product -crystallization is a good way to increase purity Experiment 2-Crystallization Remove insoluble impurities by filtration. -let it cool down and then filter off product
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Dimensional Analysis

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Dimensional Analysis Applied to Unit Conversions (Make conversions among English units and Metric units) Write down the unit equality for the units you need to convert Write down the conversion factors corresponding to the unit equality Use a symbol to represent the unknown quantity in the problem. (Put this symbol on the left side of the equal sign) Write the given information on the right side of the equal sign and multiply by one of the conversion factors. Choose the correct conversion factor by performing dimensional analysis. Units should cancel to give the desired unit. Units that are the same in the given measurement and below the fraction bar cancel from the equation.

Periodic Table Electron Configurations

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Periodic Table Electron Configurations # Element Abbrv Electron Configuration Hydrogen H 1s1 Helium He 1s2 Lithium Li 1s2 2s1 Beryllium Be 1s2 2s2 Boron B 1s2 2s2 2p1 Carbon C 1s2 2s2 2p2 Nitrogen N 1s2 2s2 2p3 Oxygen O 1s2 2s2 2p4 Fluorine F 1s2 2s2 2p5 Neon Ne 1s2 2s2 2p6 Sodium Na 1s2 2s2 2p6 3s1 Magnesium Mg 1s2 2s2 2p6 3s2 Aluminum Al 1s2 2s2 2p6 3s2 3p1 Silicon Si 1s2 2s2 2p6 3s2 3p2 Phosphorus P 1s2 2s2 2p6 3s2 3p3 Sulfur S 1s2 2s2 2p6 3s2 3p4 Chlorine Cl 1s2 2s2 2p6 3s2 3p5 Argon Ar 1s2 2s2 2p6 3s2 3p6 Potassium K 1s2 2s2 2p6 3s2 3p6 4s1 Calcium Ca 1s2 2s2 2p6 3s2 3p6 4s2 Scandium Sc 1s2 2s2 2p6 3s2 3p6 4s2 3d1 Titanium Ti

Chemistry outline chapters 1-3

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Chapter 1 Introduction: Matter and Measurement Chemistry is the study of the properties of materials and the changes that materials undergo Chemical principles operated in all aspects of life like lighting a match and even in the far reaches of our galaxy 1.1 The Study of Chemistry The Anomic and Molecular Perspective of Chemistry Matter is the physical material of the universe and is anything that has mass and occupies space A property is a characteristic that distinguishes certain types of matter from one another Elements are substances that cannot be separated into simpler substances Chemistry gives us the background of matter in atoms, which are the building blocks of matter

Forensics Notes chapter 1

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Chemistry
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Branches of biology
Forensics
Academic disciplines
Forensic pathology
Signs of death
Forensic evidence
Criminology
Forensic science
Rigor mortis
Actin
Expert witness
Calvin Hooker Goddard
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Forensics chapter 1

Welcome to Forensics Mr. Rizzo What is forensics Science? Use of the scientific method in the legal arena. The transfer of scientific techniques to aid the legal process. The use of science and technology to provide evidence. When is forensics Science used? ? To solve any problem whether criminal or historical in nature. What is Evidence? Must be relevant to the case at hand. Must be more probative than prejudicial on the issue. ?Probative evidence: tending to prove a particular proposition or to persuade you of the truth of an allegation Forensic Evidence? IT IS NOT CSI?. Is used to establish whether a particular person or thing COULD be at a particular place at a specific time. Hieronymus Bosch 1450-1516

Things to know for Chem Regents

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Chemistry
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chemistry regents review

200 Things to Know to Pass the Chemistry Regents 1. Protons are positively charged (+) with a mass of 1 amu. Example: Which has the greatest nuclear charge? Cl-35 Ar-40 K-39 Ca-40 2. Neutrons have no charge and a mass of 1 amu. 3. Electrons are small and are negatively charged (-) with a mass of almost 0 amu.. 4. Protons & neutrons are in an atom?s nucleus (nucleons). Which has the greatest number of nucleons? Sn-119 Sb-122 Te-128 I-127 5. Electrons are found in ?clouds? (orbitals) around an atom?s nucleus. Where is most of the mass of an atom found? Where is most of the size (volume) of an atom found? 6. The mass number is equal to an atom?s number of protons and neutrons added together.

Chemistry Honors Midterm Review

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Topic 1: Matter and Energy Scientific Notation M x 10n M= Mantissa (real number) n= exponent (integer, even +, -) Move decimal left, exponent is (+) number of spaces Move decimal right, exponent is (-) number of spaces Significant Figures Atlantic-Pacific Rule When a decimal is Present start on the PACIFIC Side (left side) with the first non-zero digit. All the following digits are significant 0.013=2 .00000000778=3 When a decimal is Absent start on the Atlantic side (right side) with the first non-zero digit. All the proceeding digits are significant. 387,000=3 400,300=4 The Mantissa of a number in scientific notation contains all the significant figures for a measurement 4.8x102=2 7.214x104=4 3.8000x106=5

esterification

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Chemistry
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Chemistry

Esterification reactions 1) salicylic acid + methanol ? methyl salicylate + HOCH3 + H2O H+, heat Note that many of these names have been left as common names 2) salicylic acid + isoamyl alcohol ? isoamyl salicylate + + H2O H+, heat 3) acetic acid + isoamyl alcohol ? isoamyl acetate + H2O H+, heat + 4) propanoic acid + isobutyl alcohol ? isobutyl propionate + H2O H+, heat + For more lessons, visit www.chalkbored.com
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