Title: Acids‚ Bases & Buffers Objectives: 1. To understand the acid-base chemistry. 2. To prepare and evaluate a buffer system 3. To measure the buffering capacity of two types of isotonic drinks. Introduction: There are acid-forming‚ basic forming and neutral food‚ however the acid or alkaline properties of a food is unable to judge by the actual acidity of the food itself. For example‚ citrus fruits such as lemon are acidic‚ but they are alkaline-forming when we consume and digest it. Therefore
Free PH Buffer solution Acid dissociation constant
Citric acid cycle From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search [pic] [pic] Overview of the citric acid cycle The citric acid cycle — also known as the tricarboxylic acid cycle (TCA cycle)‚ the Krebs cycle‚ or the Szent-Györgyi-Krebs cycle‚ [1][2] — is a series of enzyme-catalysed chemical reactions‚ which is of central importance in all living cells that use oxygen as part of cellular respiration. In eukaryotic cells‚ the citric acid cycle occurs in the matrix of the mitochondrion
Premium Citric acid cycle Cellular respiration Adenosine triphosphate
cells are failing. Many people confuse Alzheimer’s disease with dementia. Dementia is a set of symptoms that include problem solving‚ reasoning skills and memory loss while Alzheimer’s disease is a progressive disorder that is usually characterized by considerable dysfunctions in cognition‚ functionality‚ and behavior (Sabbagh et al.‚ 2011). Researchers have discovered changes that take place in the brains of those who have Alzheimer’s disease that may cause the memory loss and decline in other
Premium Acetylcholine Neurotransmitter
Aspirin analysis Introduction Aspirin‚ which is also known as acetylsalicylic acid. C9H8O4 is the chemical format for Asprin. The chemical structure of aspirin: Aspirin is anti-inflammatory. Aspirin is prepared by chemical synthesis from salicylic acid‚ by acetylation with acetic anhydride. The fact that it is an acid allows us to quantify the amount of aspirin in a solution. We would do this by by using an acid-base titration. Sodium hydroxide (NaOH) will be used In this experiment as the
Premium Aspirin Salicylic acid Acetic acid
Acid-Base Calculations The Ion-Product Constant for Water‚ Kw Water undergoes ionization to a small extent: H20(l) H+(aq) + OH–(aq) The equilibrium constant for the reaction is the ion-product constant for water Kw: (1) This is a key equation in acid-base chemistry. Note that the product of [H+] and [OH–] is a constant at a given temperature (Eq(1) value is for 25oC). Thus as the hydrogen ion concentration of a solution increases‚ the hydroxide ion concentration decreases
Premium Acid dissociation constant Acid PH
Recrystallization of Benzoic acid Chemistry 204-002 Date: 4/9/2011 Hector Ortega Recrystallization is a method used to purify compounds‚ and this is a very important procedure because compounds are naturally impure. Polarity and solubility play a big role in this experiment and these characteristics are exploited in order to have a crystallization of the desired compound. In this experimented benzoic acid was crystallize using ethanol and water. I chose these solvents based on part C of the experiment
Premium Solubility Solvent
Electrophoresis of Amino Acids Introduction: Electrophoresis is a separation technique based on the movement of charged ions under the influence of an electrical field. This technique is primarily used for the separation of amino acids and peptides on the basis of their charge. All amino acids contain ionizable groups that cause the amino acids‚ in solution‚ to act as charged polyelectrolytes that can migrate in an electric field. The amino acids with a net positive charge will migrate toward
Premium Amino acid Electric charge Acid
Abstract: Introduction: Materials: * Chemicals: Buffer solution‚ pH 7.0‚ 50 mL Phenolphthalein indicator solution‚ 1.0 %‚ 1 mL Potassium hydrogen phthalate‚ KHC8H4O4‚ 2 g sodium hydroxide solution‚ NaOH‚ 0.1 M‚ 150 mL Unknown weak acid‚ 1.5g Water‚ distilled or deionized * Equipment: Balance Stir bar Beaker‚ 250mL Oven Buret‚ 50 mL pH sensor Desiccator Rising stand and buret clamp Erlenmeyer flask‚ 125mL Wash bottle with distilled water Funnel Weighing dishes‚ 2
Free PH Sodium hydroxide
Unknown #: 146 Fall-11 Organic Chemistry Midterm Report 13 October 2011 Table of Contents Separation of Benzoic Acid and Acetanilide 3 Extraction and Purification of Caffeine from Tea 4 Extraction of Trimyristin from Nutmeg 5 Conversion of t-butanol to t-butyl chloride 6 Appendix 7 Calculations 8 Literature and Experimental Values of Benzoic Acid and Acetanilide 9 Experimental Caffeine IR 10 Literature Caffeine IR 11 Experimental Trimyristin IR
Premium Distillation Caffeine
Experiment Acids‚ Bases‚ and Neutrals Problem Are common house-hold products pH balanced and neutral? Information Gathered pH measures how acidic or alkaline a solution is. The pH scale ranges from 0-14. Solutions that range from 0-6 are considered to be acidic. Solutions that are on the acidic end of the scale are low in pH‚ high in hydrogen ion‚ and low in hydroxyl ions. An acid has a sour taste‚ hence‚ will react to metal and will be corrosive; therefore‚ they are considered as an electrolyte
Premium Base Acid PH