PDF-Unit 14 Buffers/Antacids Buffers. When a weak acid or weak base is

Unit 14 Buffers and Antacids 140 Frequent use of antacids may warrant the use of nonsodium containing products Back Tritrations A back titration is where you titrate what has not reacted rathe. P limit Properties Preparation Test for identification brPage 3br For Sodium brPage 4br For bicarbonate Assay Use ii Aluminium Hydroxide IP limit Properties Preparation Test for identification Assay Uses iii Aluminium Phosphate brPage 5br IP limit Pr Dr. Harris. Ch. 21 . Suggested HW. : . Ch. 21: 1, 13, 29. Buffers. Solutions that contain both a weak acid and its conjugate base are called . buffers. . . Buffers have the unique ability to . resist sharp changes in pH. &. Salts and Buffers. Chapter 19.3 and 19.5. Notes #21. Part 1: Strengths of Acids and Bases. How is there is a difference?. Citrus fruits contain citric acid that we can eat.. Industrial companies use sulfuric acid that can cause severe burns to the skin.. acetic acid, CH. 3. COOH, . pKa. = 4.8. 1.0. 0.8. 0.6. 0.2. 0.4. OH. -. equivalents. pH:. A. H. A. -. H. +. [A. -. ] . : [HA] = 1 : 1000. pH: . 1.8. = . pK. a. –3.0. Titration of a weak acid. acetic acid, CH. antacids. Acid indigestion/heartburn. Acid indigestion (discomfort in stomach) and heartburn (acid rising into . oesaphagus. ) are conditions which arise when excess hydrochloric acid is produced by the gastric glands in the walls of the stomach. The acid, which creates an acidic environment of pH 0.3 to 1.2 is needed to. AND . pH. Yogini D. Lall. Buffers are solutions which have the ability to resist changes in acidity and alkalinity.. Yogini D. Lall. Acid buffers and basic buffers are two types of synthetic buffers that are produced in the lab.. (maybe… but Probably not. We’re all going to fail).. . By: Madeline Doolin, Bailey Hiles & Adrian Burrus. The Problems. -The stomach maintains a pH of 1-2 due to the secretion of hydrochloric acid by parietal cells in the stomach wall. The extreme acidic environment allows all enzymes to function properly, digesting food and eliminating bacteria.. Acid-Base chemistry & pH. Recognizing acid/base and conjugate base/acid. Calculation of pH, . pOH. , [H. 3. O. +. ], [OH. -. ]. Calculating pH for solutions of strong acids/base. Ionization constant: . This. unit . will introduce the chemistry needed to understand how antacids work. Section . 2.4:. Defining & Naming Acids . & . Bases. Section 2.5a Characteristics of Acids & Bases. Sections 2.5b pH calculations. D8: Drug Action. D2: Antacids. D.2.1: State and explain how excess acidity in the stomach can be reduced by the use of different bases. Gastric acid is an acid that is found in the stomach and consists highly of . Assistant professor . Widad. Kamal Ali . Edited by . Assiastant. . lecturer . Amera. . Radhi. Assistant lecturer Nora . Zawar. Assistant lecturer . Ashti. . mohamed. . Biopharmaceutics. and pharmacokinetics. chemistry. Gastrointestinal . Agents. The stomach secretes:. -Hydrochloric acid(HCL). -Bicarbonate. -Pepsinogen. -Intrinsic factors. -Mucus. -Prostaglandins. Parts of stomach and their lining cells . .. Acid-Base Titration. .. المحاضرة الثانية للجزء العملي. . . Acid-Base Titration. . Analytical chemistry. : is the analysis of material samples to understanding of their chemical composition and structure. It has a wide range of monitoring pollution in the environment, development of new materials, and drug manufacture.. Acid. is defined as a substance which when dissolved in water gives hydrogen ions. (H +) . Examples.. Base is defined as a substance which when dissolved in water gives hydroxyl ions. (OH-) . Examples..