Math Practice Lab Pre-Lab Questions: 1. The rules concerning handling significant figures are as follows: When dividing/multiplying The answer has no more significant digits than the number with the fewest significant digits (the least precise figure). Round off after calculations have been performed. When adding/subtracting Answer has no more places than the addend‚ minuend‚ or subtrahend with the fewest number of decimal places. Significant figures are irrelevant when adding/subtracting
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Title: Observations of Chemical Changes Purpose: To learn about the international system of units (SI)‚ to become familiar with common lab equipment and techniques‚ to gain proficiency in determining volume‚ mass‚ length‚ and temperature of a variety of items using common laboratory measurement devices‚ to learn to combine units to determine density and concentration‚ and to use laboratory equipment to create serial dilutions and determine the density and concentration of each dilution. Procedure:
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experiments carriedout for the degradation of fabric dyes from aqueous solution using Chara and Chara beads are discussed below.Various analytical techniques like UV-Vis‚ FTIR spectroscopy were used to confirm the decolorization as UV-Vis spectroscopy; FT-IR spectroscopy and toxicity bioassay were truly used [14]. Also‚ Fourier transform infrared spectroscopy (FT-IR) is widely used to confirm the product obtained after decolorization of dye degradation experiments [15]. It helps in determination
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Biology Lab report #1 The uptake of neutral red dye in a yeast cell using different solutions Abstract Every cell transports materials in and out throught something called a membrane. There are many different methods of transport in the cell Saccharomyces cerevisiae (Serrano‚ 1977) We want to know does adding higher concentrations of azide more effectively block dye transport? We tested the transport of dye in yeast cells with a metabolic inhibitor. When we did this we showed no difference
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101 9/6/13 Hair Dye Hair dye has always been a controversial product. Many believe that it is harmful to not only the consumer but to the environment. While other believe that it is perfectly okay to use and that the only cons to it is that it can dry your hair out or turn it orange. But what really are the pros and cons of hair dye? Is it safe? No doubt there are many different kinds‚ and colors as well as purposes. Let’s take a look at the various kinds and see why hair dye is one of the most
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Observations and Chemical Changes By: Andre the Giant Higgson 02/19/14 CHE 107 E1 Intro to Chemistry 1 Objective Certain Chemicals like Bromthymol blue and Phenolphthalein can be added to other chemicals to determine acidity or basicity. Other reactions can be observed as well when different chemicals are added to each other. Procedure This experiment involved placing drops of specified chemicals into a well on a 96well plate. Each well number was recorded along with question number and name of chemicals involved
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ANALYSIS OF MOUTHWASH Background Information: Commercial mouthwashes are mixtures of water‚ alcohol‚ dyes‚ flavorings‚ and other compounds. In this experiment‚ you will use gas chromatography to determine the alcohol content of the mouthwash. Since the volumes of alcohol and water are not additive when mixed‚ a calibration curve must be used. It will provide the correction factor needed for alcohol-water mixtures. The calibration curve will be prepared by placing a known amount of alcohol
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CHROMATOGRAPHY OF PLANT PIGMENTS Marquez‚ Ma. Rica Paulene‚ Moises‚ Patrisha Kate‚ Policarpio‚ Jairus Paolo‚ Rolda‚ Zylene Joy Department of Biology‚ College of Science‚ University of the Philippines Baguio April 23‚ 2013 ABSTRACT The objective of this experiment was to apply the technique of paper chromatography as a method for separating individual plant pigments contained in plant tissue extracts containing pigment blends. The process of chromatography separates molecules because of the
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corresponding anthocyanidins using paper chromatography‚ and spectrophotometric analysis procedures. Based on experimental data the blueberries contained the most amount of anthocyanins at 1.92 x 10-6 g‚ followed by blackberries at 1.19 x 10-6 g‚ finally followed by raspberries at 5.84 x 10-7 g. The paper chromatography data also supports the idea that blueberries contained the most anthocyanidins‚ since it contained the most streaks on the chromatography paper. The main conclusion that can be
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any one factor that affects retention on paper chromatography Design and carry out a scientific investigation on any one factor that affects retention on paper chromatography CHEMISTRY LAB REPORT CHEMISTRY LAB REPORT Name: Sri Danielle Class: 9A Teacher: Sir Ajay Name: Sri Danielle Class: 9A Teacher: Sir Ajay Aim My aim for this experiment is to find out how different types of solvent will affect the retention factor in paper chromatography. Hypothesis I think that there will be a
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