The lab was to include a purpose‚ procedure‚ data/observations‚ all reactions and side reactions written out with qualitative data beneath each product and reactant except H20‚ and a summary. The purpose of this experiment is to observe the qualitative aspects of a series of reactions involving copper. Procedure 1.Measure about 1g of solid copper. 2.Place Cu in Erlenmeyer flask and place flask under fume hood. 3.Add dropwise 15M HNO3 until solid copper is completely reacted. 4.Place flask
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Promissory Notes Section 4 - Promissory note[6] A “promissory note” is an instrument in writing (not being a bank-note or a currency-note) containing an unconditional undertaking‚ signed by the maker‚ to pay a certain sum of money only to‚ or to the order of‚ a certain person‚ or to the bearer of the instrument. A promissory note is a legal instrument (more particularly‚ a financial instrument)‚ in which one party (the maker or issuer) promises in writing to pay a determinate sum of money to
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7: NOTES RECEIVABLE * Notes receivable are claims supported by formal promises to pay usually in the form of notes. * A negotiable promissory note is an unconditional promise in writing made by one person to another‚ signed by the maker‚ engaging to pay on demand or fixed determinable future time a sum certain in money to order or to bearer. * Maker is the one who writes the promissory note promising to pay another person‚ known as the payee‚ a definite sum of money. * Notes receivable
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CHEMISTRY Safety‚ Matter‚ and Measurement Lab Safety Dress appropriately Follow directions and act appropriately Know where emergency equipment is MSDS Material Safety Data Sheets- contain safety information about chemicals Converting metric units Kilo Hecto Deca Base Deci Centi Milli 1000 100 10 1 1/10 1/100 1/1000 Significant Figures NOT Significant Digits “Placeholders”- Zeros before the decimal point and after the number
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reactants are separated. A chemical change is when the reaction changes the reactants and creates a brand new substances that can’t be reversed. Antoine Lavoisier had the main contribution to The Law of Conservation. He wrote a textbook in 1789 on chemistry in it he introduced the Law of Conservation. He founded the 3 types of matter (solid‚ liquid‚ and gas). Along with this he also established the metric system. Lavoisier also made a lot of enemies because he had disproved various old theories. In
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Name Lab Section GTA Station # 5. Extraction Pre-lab questions Complete the following questions and submit before beginning the experiment. 1. Which layer will be the aqueous layer when using dichloromethane (methylene chloride) as the solvent (i.e.‚ top or bottom)? Which layer will be the aqueous layer when using ether as the solvent? 2. When everything has been separated in Part D‚ which compounds will be in test tubes 1‚ 2‚ and 3?
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References: Southam‚ Daniel‚ ed 2013. “Experiment B: Determination of Vanillin in Imitation Vanilla Essence”. In Principles and Processes in Chemistry 100 Laboratory Manual. B1-B10. Perth: Curtin University www.3dchem.com/molecules.asp?ID=307. Accessed 2/4/13 RHODIA.www.cefig.org/Documents/industrysupport/RHODIA%20GPS%20safety%20summar y.pdf. Accessed 2/4/13
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Analytical Chemistry Daniel C. Harris: 7-4‚ 8‚10‚12‚16 7-4) A 1.000g sample of unknown analyzed by Reaction 7-2 gave 2.500g of bis(dimethylglyoximate) nickel(II). Find the wt% of Ni in the unknown. 7-8) The man in the vat. Once upon a time‚ a workman at a dye factory fell into a vat containing a hot concentrated mixture of sulfuric and nitric acids‚ and he dissolved! Because nobody witnessed the accident‚ it was necessary to prove that he fell in so that the man’s wife could collect his insurance
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elements and compounds found in mixtures that make up earth materials. Applying appropriate models‚ theories and laws of chemistry to the range of earth materials allows a useful classification of the materials and a better understanding of the properties of substances. This module increases students’ understanding of the nature‚ practice‚ applications and uses of chemistry. Outcomes: 8.2.1 The living and non-living components of the Earth contain mixtures .2.1 a) Construct word and balanced
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Section A (Answer ALL questions in this Section.) 1. Rubidium (Rb) and potassium belong to the same group in the Periodic Table. The relative atomic mass of rubidium is larger than that of potassium. (a) Explain whether rubidium is more reactive than potassium. (b) Write a chemical equation for the reaction between rubidium and water. (State symbols should be given.) (c) Suggest how rubidium can be stored safely in the laboratory. (d) Suggest ONE safety precaution for handling
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