Chemistry For Dummies From Chemistry For Dummies‚ 2nd Edition by John T. Moore During the first year of high school chemistry or the first semester of college chemistry‚ all the terms‚ units of measurement‚ and atoms‚ molecules‚ elements‚ and compounds may seem a bit overwhelming. The good news: Your Chem I class doesn’t have to be torture. This handy Cheat Sheet provides some basic information you can refer to regularly to make your chemistry class just a tiny bit easier. Chemical Bonding Basics
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solution is then refluxed for about 30 minutes and the precipitate is dried by suction filtration. This product will be analyzed and classified by UV-Vis‚ FT-IR‚ and H1 FT-NMR. Once the product is determined to be TPP‚ it will be reacted with ZnCl2 and CuCl2 separately. An excess amount of the metal chloride will be added to a round bottom flask‚ along with the TPP‚ and will be refluxed for 30 minutes in the presence of DMF. The resulting precipitates will then be dried by suction filtration and classified
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Experiment 5 Determination of Empirical Formulas of Hydrate and Oxide Compounds Room #216 Locker# 1137 Date of Experiment: May 11‚ 2014 Date of Submission: May 16‚ 2014 Purpose: To determine the identity of an unknown hydrated salt calculating the percent water loss after heating and also to determine the empirical formula of magnesium oxide. Results: Table 1: Determination of the mass of waters of hydration of an unknown hydrated compound. Hydrated Compound code: C-14 Mass
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silver nitrate to react with the salt from perspiration produced 5.8 x 10-2 grams of silver chloride. How many grams of salt was left by the initial latent fingerprint? Brainstorm the steps to solve this problem as you recall the steps to solving stoichiometry calculations. Be prepared to explain your solution including your decisions with significant figures and scientific notation to increase accuracy. Be sure you complete each step of the process: 1. Write the chemical equation. AgNO3 + NaCl
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Shown below are examples of each type of acid undergoing a reaction with sodium hydroxide. Monoprotic: HCl(aq) + NaOH(aq) → H2O(l) + NaCl(aq) Diprotic: H2SO4(aq) + 2 NaOH(aq) → 2 H2O(l) + Na2SO4(aq) Triprotic: H3PO4(aq) + 3 NaOH(aq) → 3 H2O(l) + Na3PO4(aq) Any acid that has more than one proton that undergoes a reaction with a base is called a polyprotic acid. Citric acid is a weak‚ polyprotic acid that undergoes the following reaction with sodium hydroxide. H3C6H5O7(aq) + 3 NaOH(aq) → 3 H2O(l)
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Identification and Production of Materials ================================ Ethene‚ Polymers and Ethanol ================================ Catalytic Cracking Oil refineries need to balance their outputs of various products (petrol‚ diesel‚ fuel oil‚ etc.) to match the demands of the marketplace. Catalytic cracking is the process in which high molecular weight (high boiling point) fractions from crude oil are broken into lower molecular weight (lower boiling point) substances in order to increase
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will aid in finding the concentration. These procedures are dependent on gravimetric analysis (the most accurate and reliable procedures). Important requirements for a successful gravimetric analysis include: a pure compound with an identifiable stoichiometry‚ the precipitation reaction must be complete‚ specificity of precipitation reagent in sample‚ the solid sample should be a reasonable-sized crystal‚ and the molecular weight should be reasonable enough for a good weight of the precipitate generated
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Weigh out 20.0 g of sucrose and place it into a 250-mL Erlenmeyer flask. Add 100 mL of water and gently shake until all the sucrose has dissolved. To this solution add 0.60 g of dipotassium hydrogen phosphate (K)‚ 1.8 g of sodium phosphate hydrate (Na3PO412HO) and 2.0 g of dried baker’s yeast. Vigorously shake the contents to mix them thoroughly. The Erlenmeyer flask is fitted with a one-hole rubber stopper containing a short piece of glass tubing. Latex tubing (8 -12 in.) is attached to the glass
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Writing Complete Equations Practice For each of the following problems‚ write complete chemical equations to describe the chemical process taking place. Important note: There are a few physical processes on this sheet – You can’t write an equation for a physical process! 1) When lithium hydroxide pellets are added to a solution of sulfuric acid (dihydrogen sulfate)‚ lithium sulfate and water are formed. 2) When dirty water is boiled for purification purposes‚ the temperature is brought up to
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Title: CHEM-181 General Chemistry I 2. Semester Hours: 4 Contact Hours: (3 + 2) Lecture Lab 3. Catalog Description This course‚ intended for science majors‚ is the first course of a two-course sequence. Course topics include stoichiometry‚ inorganic nomenclature‚ solutions‚ gas laws‚ thermochemistry‚ atomic structure‚ and chemical bonding. The laboratory work includes basic laboratory techniques and is intended to support lecture topics. It is highly recommended that students
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