that all the site is safe‚ not just a small area where you would have taken your first sample from. I will return to the lab with the samples of soil I have extracted from the site. Here I will make a solution from the samples in order to carry out the identification tests. In order to turn my soil samples
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Irresistible? By Elizabeth Potter December 5‚ 2012 Lab Section 503 Abstract The over all goal of the Irresistible lab was to verify a buffer’s ability to resist changes in pH with consecutive 1mL additions of either a strong acid (HCl) or base (NaOH). The experiment entailed preparing a combination 10 buffered and non-buffered solutions and then monitoring the pH changes as a strong acid or base was added to the solution. By performing this experiment‚ it was found that with increasing amounts
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The Mass of Acetylsalicylic Acid in Aspirin ------------------------------------------------- Purpose The purpose of the lab is to determine the mass of the ‘active ingredient’ in a commercial ASA tablet. ------------------------------------------------- ------------------------------------------------- Introduction There are three main theories surrounding acids and bases including the Arrhenius‚ Bronsted-Lowry‚ and Lewis theories. The Arrhenius theory of acids and bases states that
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3. Depreciation percentage=$1‚640‚200/$15‚411‚620 = 10.64% New Fixed Assets=$15‚411‚620 + $30‚000‚000 = $45‚411‚620 $45‚411‚620*.1064 = $4‚831‚796 new depreciation Pro forma Income Statement Sales ($36‚599‚300*1.12) $40‚991‚216 Cost of Goods Sold ($26‚669‚496*1.12) 29‚869‚836 Other Expenses ($4‚641‚000*1.12) 5‚197‚920 Depreciation 4‚831‚796 EBIT 1‚091‚664 Interest 573‚200 Taxable Income 518‚464 Taxes
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Acid/Base Titrations Pre- Lab Questions 1. Using your textbook or a handbook‚ look up the formula and structure of potassium hydrogen phthalate (KHP) used to standardize the solution of NaOH in this experiment. Calculate the Molar Mass of KHP. Molar Mass= 204.22 g/mol Formula: KC8H5O4 2. Using your textbook or chemical dictionary‚ write the definition of indicator. Indicator- a substance added at the beginning of the titration that changes color at (or very near) the equivalence
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concentration on the rate of the reaction. So for the chemical equation for this experiment: The reaction rate is: . Due to the fact that alcohol is found in excess in this reaction it can be removed from the expression‚ leaving the expression: Beers Law states that the amount of light absorbed is proportional to the concentration of a species‚ in this case (3). Where A is the measure of absorbance. Ԑ is the molar absorptivity‚ and is the constant of proportionality. And c is the concentration of
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The 1950’s-60’s70’s-80’s Miranda Moultrie Nixon Back Again The United States presidential election of 1968 was the 46th quadrennial presidential election‚ held on Tuesday‚ November 5‚ 1968. Moon Shot On July 21‚ 1969‚ President Nixon spoke from the Oval Office to Apollo 11 astronauts Neil Armstrong and Edwin Aldrin at the Sea of Tranquility on the Moon. Apollo 11 was the spaceflight that landed the first humans on the Moon‚ Americans Neil Armstrong and Woodstock A village in New York state
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LAB REPORT Introduction: In a chemical change‚ the identities of substances change and new substances form. In an equation the substances on the left are the reactants. The substances on the right are the products. In this experiment the objectives are to observe evidence that a chemical change has taken place. Infer from observations that a new substance has been formed. Identify and record observations that show energy is involved in chemical change observe the color‚ solubility of some substances
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Feb. 19‚ 2015 Liangting Lin 1-4 Lab Partner: Sunny Zhao 20C: Acid-Base Titration Purpose/Objective: 1. To titrate a hydrochloric acid solution of unknown concentration with 0.50M sodium hydroxide‚ and determine the molarity of the hydrochloric acid 2. To titrate an acetic acid solution with 0.50M sodium hydroxide‚ and determine the molarity and percentage composition of the vinegar. Apparatus
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Tyler Cowan Professor Foltz Biology 181 April 8th 2015 Lab Report: Respiration Abstract: The objective of this lab was to figure out which has a higher cell respiration rate between crayfish and elodea. In order to figure this out we first set up three beakers to represent our control‚ elodea and crayfish and filled them with 75mL of culture solution which were dechlorinated making the solution acidic. We then had to place both the elodea and the crayfish in separate beakers filled with 25mL of
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