that an acid is a substance that donates hydrogen ions. Because of this‚ when an acid is dissolved in water‚ the balance between hydrogen ions and hydroxide ions is shifted. Now there are more hydrogen ions than hydroxide ions in the solution (2). A base can increase the pH level by providing hydroxide and then being removed. The buffer section of this lab was used to stabilize the level of pH using 4 different types of samples. The pH levels of the
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that our data in the experiment was “good data”. We had the expected positive results occur from the identification experiments. We made sure to measure everything correctly. We correctly identified the precipitate Zn(OH)2 by performing the acid and base test on our precipitate. We received a positive result for each test performed for the presence of the zinc hydroxide compound. It was interesting to note the appearance of the zinc hydroxide from only the mixture of zinc‚ iodine and deionized water
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Mg(OH)2 and swirled by hand This was continued until it turned from pink in colour back to a colourless solution The amount of HCL was then recorded in a data table This titration was carried out four times‚ the first being use for a base line Theory Hydrochloric Acid | + | Magnesium | | Magnesium Chloride | + | water | 2HCl (aq) + Mg(OH)2 (aq) ⇒ MgCl (aq) + 2H2O (l) Neutralization Reaction Hydrochloric acid reacts with Mg(OH)2 the products
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Skinny Dipping and You Why this is no longer a perfect date 12/8/2007 Aaron Gonzalez Materials and Methods Nikon Compound Microscope Glass Microscope slides Cover Slips Paper Towels Thermometer Glass Jar pH Strips I took the sample pond water from the library pond (Central Michigan University)‚ thinking well during mock rock this year I want to know really what I am swimming in. So I took a jar then scooped it up from the muskiest part of the pond. After collecting
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1%) concentration which permits detection of the utilization of this substrate only. The acid base indicator phenol red- also incorporated to detect carbohydrate fermentation that is indicated by a change in color of the medium from orange-red to yellow in the presence of acids. a. Method to inoculate slant: stab and streak procedure which requires insertion of sterile straight needle from the base of the slant into the butt. Upon withdrawal‚ the slanted surface of the medium is streaked. Determining
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being used increasingly as resolving bases for racemization since phenylethylamine is synthesizable and can readily be resolved into its antipodes. In contrast to naturally occurring alkaloids theoptically active forms of 1-phenylethylamine can be provided in any desired amount for technical purposes. In the racemization of synthetically prepared resolving bases‚ two antipodes are necessarily produced in equal amounts. However‚ it is largely only one resolving base that is needed for the racemization
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Figure 1: Titration curve of 0.160 grams of an unknown diprotic acid that was dissociated in distilled water. Shown is the pH versus the volume in milliliters of 0.1 M NaOH‚ a strong base‚ added to the solution. The initial pH reading of the solution was a pH of 2.60. Although the pH of the ½ equivalence point was unknown‚ it could be estimated by halving the volume of NaOH used at the first equivalence point. At the first equivalence point‚ 13.63 milliliters of NaOH had been added to the unknown
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sodium hydroxide solution‚ NaOH Actual concentration of sodium hydroxide solution used can be calculated by using the formula : MaVa = A MbVb B Where : M = Molarity; V = volume; a=acid; b = base; A = Number of moles of acid B = Number of moles of base Balanced chemical equation C8H5KO4(aq) + NaOH (aq) C8H4KO4Na (aq) + H2O From equation‚ 1 mol of C8H5KO4 react with 1 mol of NaOH 1.When Ma = 0.5 mol/dm³‚ ((0.5 mol/dm³) ( 0.023 dm³ ))/(Mb ( 0.066 dm^3))= 1/1
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Discussion of Theory: The lab as able to determine the concentration of NaOH by neutralizing the solution with HCl‚ a solution which its concentration was already known‚ this process is called titration. It works by neutralizing a solution from a weak acid/base and its
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A Jumping-Off Place 1. In what way will the culture of Spain be different from that of the United States? In the United State‚ the power distance seems to be less accepted compares to Spain. United State is the country that everyone has equal rights and all of them are being treated the same way and people can say whatever they want to anybody as long as it is not harmful to anyone. In an U.S. company‚ it will have less of hierarchy and everyone seems to be equal and not categorized by their
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