Introduction to Measurement Mass‚ Length‚ and Volume Introduction Much of what we know about the physical world has been obtained from measurements made in the laboratory. Skill is required to design experiments so that careful measurements can be made. Skill is also needed to use lab equipment correctly so that errors can be minimized. At the same time‚ it is important to understand the limitations of scientific measurements. Concepts Measurement Significant figures Accuracy
Free Measurement
Thin Layer Chromatography of Unknown Samples and Paprika By: Uyen Huynh Date: June 18‚ 2014 Lab Partners: Philip Murray Professor and section: M. Pandey‚ CHM2210L.601 Data: Analysis of Drug Store Items Knowns Rf Values Aspirin .91 cm Acetaminophen .85 cm Ascorbic Acid .86 cm Unknown .97 cm Identity of unknown mixture Acetaminophen Analysis of Paprika Pigments Spot Number Rf Color 1 1 Red-orange 2 1 Red-orange Calculations
Premium Aspirin Salicylic acid Acetic acid
to determine the concentration of sodium carbonate in an unknown sample by titration. The solution of hydrochloric acid was prepared and standardized using Na2CO3. Observations: Week 1: Standardizing hydrochloric acid using sodium carbonate with bromocresol green indicator Table 1: Titration of sodium carbonate using hydrochloric acid Trial | Mass of Na2CO3 (g) | Burette Reading (mL) | Final Volume of HCl (mL) | | | Initial | Final | | 1 | 0.2123 | 0.00 | 42.34 | 42.34 |
Premium Titration Hydrochloric acid PH
PROPERTIES OF SOLUTIONS A solution is a mixture of materials‚ one of which is usually a fluid. A fluid is a material that flows‚ such as a liquid or a gas. The fluid of a solution is usually the solvent. The material other than the solvent is the solute. We say that we dissolve the solute into the solvent. Some solutions are so common to us that we give them a unique name. A solution of water and sugar is called syrup. A solution of sodium chloride (common table salt) in water is called brine
Premium Water Sodium chloride Carbon dioxide
Metabical: Positioning and Communications Strategy for a new Weight-Loss Drug Q & A 1. Who is involved in the decision making process? What is the decision making process for Metabical? Since Metabical is a prescription drug for weight loss which can only be bought via a prescription‚ the overweight patients are not the only decision makers involved. The health care providers are also decision makers in this process for they are the ones who prescribe the drug. The consumer decision
Premium Marketing Obesity Medicine
Communications Strategy for a New Weight-Loss Drug Case Study Case Article:Click Here Questions for Analysis 1. Metabical is faced with the task of positioning their product in the marketplace. Using the information from the case and your assigned readings‚ who are the key target segments for Metabical and what points of difference should be directed to each segment? Key Segments for Metabical are 1. End consumer(the patient) - Over weight adults in US (BMI 25-30) 2.
Premium Health care Medicine Marketing
Submitted: October 00‚ 2014 Experiment No. 7 Unknown: 2 Compound: Table 6.1Physical Examination State Liquid Odor Smells like adhesive paste Color Pink-orange Flammability Flammable Table 6.2Physical Constant: Melting Point Parameter Experimental Theoretical (From Literature) Melting Point (oC) Trial 1 Trial 2 Average 88 88 86 86 Table 6.3Solubility Test Sample Solubility Solubility Class Water Ether 5% NaOH5% Na2CO3 5% HClConc. H2SO4 Unknown Sample + + + + + + Basic Compound Table 6.4Qualitative
Premium Functional group Carboxylic acid Acetic acid
Chemistry F332 Notes Ions in solids and solutions: Structure of an ionic lattice (Sodium Chloride): * Consists of sodium ions (Na+) surrounded by six chloride ions (Cl-) * Chloride ions also surrounded by six sodium ions. * Held together by attraction of oppositely charged ions. * Giant ionic lattice. * Electrostatic bonds hold lattices together. * Structure is simple cubic. * Some ionic crystals contain water. * Known as water of crystallisation. * These crystals
Premium Chlorine Sodium chloride Ion
Within the last decade‚ weight has become an obsession for most Americans. Yet‚ most people try dieting and still find themselves fluctuating in weight. Diets fail because they are a short term fix. They often restrict a lot of food to get fast results. When one comes off a diet‚ weight rapidly packs back on. What most people do not know is that maintaining ideal weight is a lifestyle change with an appropriate frame in mind. In order to lose and maintain weight‚ people need to undergo a lifestyle
Premium Nutrition
Synthesis of t-Pentyl Chloride Introduction: Using SN1 reaction mechanism with hydrochloric acid‚ t-Pentyl alcohol was converted to t-Pentyl chloride in an acid catalyzed reaction. The reaction took place in a separatory funnel designed to separate immiscible liquids. The crude product was extracted by transferring a solute from one solvent to another. The process of washing the solutions by phase transfer was used in order to remove impurities from the main solvent layer. Finally‚ the crude
Premium Ethanol Solvent Distillation