Topic 11 - Yassine Assim Question: Explain the concept of a conjugate acid-base pair. Using equilibrium law and K‚ explain the relationship between the strength of an acid/base and its conjugate. Conjugate Acid-Base Pair: Conjugate acids and bases were presented by Bronsted-Lowry‚ who was a chemist who proposed the theory that both acids and bases required the transfer of a proton in order for there to be a reaction. An acid will donate a proton (proton donor)‚ forming what is considered to be a
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determination of Ascorbic acid Concentration in an Unknown Solution Introduction: The naturally occurring organic compound with antioxidant properties is Ascorbic acid shortly referred as (AA). Normally the color of Ascorbic acid is white‚ but in some cases of impure samples it appears yellow in color. Ascorbic acid is solid in state. In water it dissolves well to give mildly acidic solutions. Ascorbic acid is one form ("vitamer") of vitamin C [1]. So‚ Ascorbic Acid (AA) in other terminology
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Vitamin C Introduction: The lab consists in determining the vitamin C concentration in a solution by a redox titration using iodine. Vitamin C (ascorbic acid) is a water-soluble‚ essential oxidant that plays a vital role in the protection of the body from infections and disease it is acquired from primary fruits and vegetables. With the use of different materials as natural orange juice‚ Tampico (chemical orange juice) and other solutions that contain vitamin C we will find the amount of vitamin
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An Unknown Amino Acid From Titration Abstract Experiment 11 used a titration curve to determine the identity of an unknown amino acid. The initial pH of the solution was 1.96‚ and the pKa’s found experimentally were 2.0‚ 4.0‚ and 9.85. The accepted pKa values were found to be 2.10‚ 4.07‚ and 9.47. The molecular weight was calculated to be 176.3 while the accepted value was found to be 183.5. The identity of the unknown amino acid was established to be glutamic acid‚ hydrochloride. Introduction
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basic‚ or neutral. We are able to figure out which one it is based on properties‚ along with the pH. Acids taste sour‚ and bases taste bitter. Using the pH scale‚ you are able to know how strong of an acid or base a liquid is. High concentration of [H+] ions means that the liquid has a low pH. Therefore a liquid with a low concentration of [H+] would have a high pH. A pH of less than 7 represents an acid‚ while a pH above 7 represents a base. A pH of 7 would be neutral. In this lab‚ we used red cabbage
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Gastric and Duodenal Ulcers Nicole Navarro Gastric and Duodenal Ulcers Gastric and duodenal ulcers are both fall into the category of peptic ulcer disease and can be defined as “a break‚ or ulceration‚ in the protective mucosal lining of the lower esophagus‚ stomach‚ or duodenum”(Dudley-Brown & Huether‚ 2012‚ p. 903). Increased secretion of gastrin and gastric acid can cause gastric and duodenal ulcers to form. Some contributing factors that may lead to ulcers include infection of
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sodium hydroxide (3 M‚ ~ 20 ml) to a benzoic acid (1.256 g‚ 10.3 mmol) /water mixture (10 ml). Benzoic acid is insoluble in water. The hydroxide base rapidly deprotonates the acid‚ producing the benzoate anion which is readily soluble in water. The two phase benzoic acid/water system was cleanly converted to a sodium benzoate solution. The preservative‚ sodium benzoate‚ is water soluble. To simulate the acidic environment of the stomach‚ hydrochloric acid (3 M) was added to bring the pH of the benzoate
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KERRY ACIDS‚ BASES‚ & NEUTRALS September 20‚ 2010 EXPERIMENT Acids‚ Bases‚ and Neutrals Problem Are common house-hold products pHs balanced and neutral? Information pH measures how acidic or alkaline a solution is. Its concept was introduced in 1909 by biochemist Soren Sorensen. The scale ranges from 0-14. Solutions that range from 0 to 6 are considered to be Acidic. Solution that’s on the Acidic end of the scale is low in ph‚ high in hydrogen ion‚ and low in hydroxyl ions. An
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in the equine industry‚ gastric ulcers appear in sixty to ninety percent of horses depending on athletic demand‚ lifestyle‚ and age (Bell et al.‚ 2007‚ Nadeau et al.‚ 2003). While gastric ulcers primarily effect the un-protected‚ non-glandular region of the stomach‚ above the margo plicatus‚ they can appear in any area of the stomach (Nadeau et al.‚ 2003; Videla and Andrews‚ 2009). An overall decrease in performance‚ weight loss‚ and colic are typical indications of gastric ulcer presence‚ although
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Antacids are defined as a substance‚ generally a base‚ which counteracts stomach acidity. The name antacid means anti-acid (against acid). Antacids are the primary treatment for ailments such as gastric reflux‚ gastritis‚ upset stomach and heartburn. Hydrochloric acid is secreted by the stomach to kill harmful organisms‚ aid digestion and activate digestive enzymes. Excess secretion of acid into stomach or impaired resistance by the lining of the stomach or reflux into the oesophagus may produce symptoms
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