In this lab‚ we were able to determine measuring the pH of liquids work. We were able to compare the liquids based on their pH level and determine which liquid was acidic or basic. Our results showed that if something came out to be seven or less‚ according to the pH scale‚ it means 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
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Conclusion Both Kool Aid and Gatorade contain buffers. For the buffer in Kool Aid‚ pKa1 ≈ 3.70‚ pKa2 ≈ 4.90‚ pKa3 ≈ 6.50 and for the buffer in Gatorade‚ pKa1 ≈ 4.50‚ pKa2 ≈ 5.40‚ pKa3 ≈ 6.70. Discussion of Theory A buffer capacity is the maximum amount of hyrdrogen or hydroxide ion that can be added to a buffered solution before a significant change in the pH occurs. Increasing the concentration of the buffer can increase the buffer capacity of a solution. At the half equivalence point‚ the moles
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During the preparation of the 0.100M Tris buffer‚ the calculated amount of ingredients brought the solution to a pH of 7.0‚ but the desired pH was 7.50. Discrepancies between the theoretically calculated amounts and the actual measured amounts of ingredients are likely to be the biggest source of error. Dilution affected our 0.0100M Tris buffer by decreasing its pH. The buffer was originally set to a pH of 7.48‚ but the pH gradually moved down by a pH unit of about 0.1 after each dilution. This is
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EXPERIMENT NO 1. MATERIALS Sofdriks (coke) Dropper Vinegar Milk (yakult) Litmus paper Beer Ampalaya fruit Distilled water Calamasi PROCEDURE: 1. Prepare the materials that needed in experiment. 2. Using dropper‚ get a little amount of coke‚ vinegar‚ milk‚ beer‚ and distilled water then drop to red and blue litmus paper. Record the result. 3. Squeeze the
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Isolation of yeast RNA Methods The experiment was first started through mixing of 3.0 g dry yeast‚ 5.0 ml of 1% NaOH and 25.0 ml distilled water in 100 ml beaker. The resulting mixture was heated in a boiling water bath for 15 minutes while being stirred. The suspension was strained using cheesecloth and the obtained filtrate was obtained and collected in the beaker. This was then centrifuged at maximum speed for about 10-15 minutes. Centrifugation‚ which uses the idea of gravity‚ break up
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GENERAL BIOCHEMISTRY Problem Set No. 1 Answered by: Andrea Rose A. Fajardo of BSFT 2-1N 1. Calculate the pH of a dilute solution that contains a molar ratio of potassium acetate to acetic acid (pKa=4.76) of: a. 2:1 pH = 4.76 + log[2]/[1] = 4.76 + 0.3010 = 5.06 b. 1:4 pH = 4.76 + log[1]/[4] = 4.76 + (-0.6021) = 4.16 c. 6:5 pH = 4.76 + log[6]/[5] = 4.76 + 0.0792
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LIDE Learning Center‚ Inc. 6539 Isabel‚ Leyte Synthesis of Aspirin An Investigatory Project Presented to: Edmundo A. Quiñones Chemistry Teacher In Partial Fulfillment of the Requirements In Science and Technology III (Chemistry) Presented by: Kenneth Ivan P. Durano Cyrill Val G. Lozano March 6‚ 2010 APPROVAL SHEET This investigatory project entitled “The Synthesis of Aspirin” requirement for Science and Technology III (Chemistry) has
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t Design and preparation of buffers effective at different pHs Abstract These experiments aimed to determine the optimum pH ranges various buffers are effective and provide opportunity for the use of the Henderson-Hasselbalch equation to prepare a buffer of a specific pH. Three different buffer systems were initially investigated; volumes of weak acid and weak bases of specified concentration were prepared and titrated against strong acid or strong base solutions with pH readings taken at frequent
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FC024 10th Jun 2013 Monday 2-4 pm Scientific Principles and Enquiry (Working in Pairs) Experiment 1 – pH Titrations Introduction In quantitative chemical analysis‚ acid - base reactions are often used to provide a basis for various titration techniques. The equivalence points of acid - base titrations can be estimated from the colour change of chemical indicators‚ such as phenolphthalein‚ methyl red‚ methyl orange and so on. The choice of an indicator
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Lab Name:Titration of NaOH Author: Simon Sun Lab Partner: Jason Lee & Fiona Wang Date: March 10th & 17th Introduction： The purpose of this lab is to observe the titration between acid and base‚ and calculate the morality of unknown solution base on the volume required to reach equivalence point and stoicheiometry. There are two groups of experiments. The first one is the reaction between nitric acid and sodium hydroxide which is a reaction between strong acid and strong
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