EXPERIMENT #1: SCIENTIFIC MEASUREMENT AND ERROR By: Date: 8/26/13 Objectives: The goals of the experiment are to learn how to use different types of scientific glassware and to understand the significance of precision and accuracy in scientific measurement. Procedure: No modifications were made during the experiment. Data: Data tables for the experiment are provided on attached sheet. Calculations: Table I - Table III – Table IV –
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Global Calibration Services Market - Size‚ Share‚ Global Trends‚ Company Profiles‚ Demand‚ Analysis‚ Research‚ Report‚ Opportunities‚ Segmentation and Forecast‚ 2014-2018 Calibration is undertaken to compare the performance of a measurement instrument against a measurement standard. Calibration indicates traceability of the instrument‚ accuracy of the measured data. Industries across the globe are increasingly adopting calibration services in their production process. Calibration undertaken at
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Acid-Base Titration Pre-Lab Discussion In the chemistry laboratory‚ it is sometimes necessary to experimentally determine the concentration of an acid solution or a base solution. A procedure for making this kind of determination is called an acid-base titration. In this procedure‚ a solution of known concentration‚ called the standard solution‚ is used to neutralize a precisely measured volume of the solution of unknown concentration to which one or two drops of an appropriate acid-base
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Techniques and Measurements PURPOSE: The purpose of this set of experiments (3 total) is to become familiar with the common types of laboratory glassware and equipment‚ and how to obtain and analyze data from these items. LEARNING OBJECTIVES: By the end of this experiment‚ the student should be able to demonstrate the following proficiencies: 1. Know which glassware (beakers‚ burettes‚ pipettes‚ graduated cylinders‚ flasks‚ etc) should be used in various circumstances. 2. Know how to “correctly” measure
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factors determine the density of a solution? Can the density of a solution be used to determine how much of a particular substance is dissolved in it? Concepts • Density • Concentration • Solution • Calibration Curve Background The density of a pure substance is a characteristic physical property that can be used to identify the substance. Density is defined as the ratio of mass per unit volume. It is an “intensive” property‚ that is‚ it does
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Laboratory Apparatus Beakers are useful as a reaction container or to hold liquid or solid samples. They are also used to catch liquids from titrations and filtrates from filtering operations. Bunsen burners are sources of heat. Burets are for addition of a precise volume of liquid. The volume of liquid added can be determined to the nearest 0.01 mL with practice. Clay triangles are placed on a ring attached to a ring stand as a support for a funnel‚ crucible‚ or evaporating dish.
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Experiment 1: Pipet Calibration and Excel C311: Section 8919 5/18/2009 Purpose: The purpose of the pipet calibration is to determine the accuracy and precision of 10ml of water at room temperature by using a 10ml volumetric pipet. Also‚ analyzing the analytical balance and the density of water from literature reference. Experimental: Description of glassware‚ equipments‚ and materials: 10
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Determination of Calcium Carbonate in Eggshells – Background The major component of eggshells is calcium carbonate‚ CaCO3(s). This analysis is done volumetrically by using a characteristic reaction of carbonate compounds‚ namely their reaction with acids. Calcium carbonate (limestone) is very insoluble in pure water but readily reacts in acid according to the reaction below. 2HCl(aq) + CaCO3(s) → CaCl2(aq) + CO2(g) + H2O(l) + HCl(aq) (in excess) (limiting reagent) (1) (unreacted)
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Chemistry 12 Santa Monica College Determination of Kc for a Complex Ion Formation Objectives • • Find the value of the equilibrium constant for formation of FeSCN2+ by using the visible light absorption of the complex ion. Confirm the stoichiometry of the reaction. Background In the study of chemical reactions‚ chemistry students first study reactions that go to completion. Inherent in these familiar problems—such as calculation of theoretical yield‚ limiting reactant‚ and percent yield—is
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Experiment #10 Volumetric Analysis The Titration of Acids and Bases Purpose This experiment will allow you to gain practical experience in the preparing standard solutions‚ using a pipette and a buret‚ and performing standard titrations. You will use this experience to experimentally determine the concentration of acetic acid in an unknown solution. There are three parts to this experiment‚ they are 1. Preparation a standard solution of oxalic acid (~0.07 M) 2. Preparation a sodium
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