set up to discover the kind of connection between the concentration and absorbance of CuSO4 and have the capacity to utilize this information to measure grouping of unknown concentration in view of a given absorbance rate. To get a straight line calibration curve‚ absorbance versus focuses to be plotted. The
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Safety Concerns in the Laboratory Safety goggles must be warn at all times during a lab session. This is very important because they protect your eyes from harmful matter such as chemicals‚ glass‚ and fumes. It is very important to note that they must be goggles and not glasses. Safety glasses may protect the eyes from flying debris and splashes but may not protect the eyes from gas fumes or splashes from underneath. Also‚ wearing contact lenses in a chemical laboratory without proper coverage
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CLINICAL CHEMISTRY – defined as the study of biochemical processes associated with health & dse & the measurement of constituents in body fluids or tissues to facilitate dx of dse - dual nature since it’s both a basic and applied science thus clin chem. technologists & technicians should have an understanding of the physiologic & biochemical processes occurring in the body‚ as well as technical skills to perform the various tests - chemistry in connection with the management
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equivalence point is the most crucial point in the titration. It is the point during the titration where the moles of base added will equal the moles of acid in the unknown solution (or vice versa). Since the volume of base added can be read from the buret at this point and the concentration of the base and the volume of the acid are also known‚ the concentration of the unknown acid solution can be determined. There are a number of ways to determine the equivalence point‚ two of which can be used in
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Fermentation of Carbohydrates: Ethanol from Sucrose Objective: To demonstrate a fermentation process‚ isolate the ethanol produced by fractional distillation‚ determine the composition of the ethanol solution recovered‚ and make stoichiometric and yield calculations. Procedures: Fermentation Weigh out 20.0 g of sucrose and place it into a 250-mL Erlenmeyer flask. Add 100 mL of water and gently shake until all the sucrose has dissolved. To this solution add 0.60 g of dipotassium hydrogen phosphate
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Units of Measurement: Sections 1.4-1.5 Physical Quality Name of Unit Abbreviation Mass Kilogram Kg Length Meter m Time Second sª (Sec) Temperature Kelvin K Amount of Substance Mole mol • Système International d’Unitès (used in the science community world wide) • Uses different base unit for quantity Velocity m/s (two base units build velocity = derived unit) {g/sec‚ kg/min} Metric System Prefix Abbreviation Meaning Mega M 106
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Concentrations versus absorbance were used as the axes. The calibration curve for Ca is displayed below in Figure 1. To calculate the concentration of the unknown‚ the linear regression line was set to zero‚ and x was calculated in ppm. This ppm was subjected to a series of mathematical adjustments to account for
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exactly the same way while accuracy indicates the closeness of the measurement to its true value. This experiment was used to determine the accuracy and precision of different volumetric measuring devices‚ as well as determining the density of an unknown metal. This lab was to help understand the application to volumetric measurements. Part 1: First‚ the next-to-smallest beaker was cleaned‚ dried‚ and weighed on the scale where it’s mass was determined. The container was then tared so the scale
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Determination of Vitamin C by Redox Titration with Iodine Vitamin C (ascorbic acid) is an antioxidant that is essential for human nutrition. Vitamin C deficiency can lead to a disease called scurvy‚ which is characterized by abnormalities in the bones and teeth. Many fruits and vegetables contain vitamin C‚ but cooking destroys the vitamin‚ so raw citrus fruits and their juices are the main source of ascorbic acid for most people. One way to determine the amount of vitamin C in food is to use a
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