Serina Pooja Sowman | Practical 7: Determination of Hardness in Water | | | | | 10/3/2012 | | Aim: To determine the different types of hardness and alkalinity found in the water by titration methods. This is used to calculate the concentrations of calcium and magnesium found in the water. Principles: The hardness of water is determined to provide a measure of the quality of water for household and industrial use. Hard water is not a health hazard. Drinking hard water
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Brain Death Determination When the brain has a lack of oxygen‚ even for a few minutes‚ it could lead to loss of brain functions such as a gradual loss level of consciousness or a complete loss of consciousness causing the person to slip into a coma. In the most profound cases‚ irreversible brain damage and death occurs. Oxygen deficiency can by caused by many things‚ such as; a brain injury‚ fall from height‚ traffic accidents‚ heart failure‚ stroke or some neurological disease. That may cause
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Report of Density Determinations Density is defined as the mass of substance per unit volume. Both pure substances and solutions are applicable. Today we are going to determine the Density of rock chunks and NaCl solution. In this experiment‚ we will determine the mass and volume of each object and then we will calculate the ratio—the density. In the first part of the experiment‚ we should measure the density of some irregularly shaped chunks of rock. The Weight of rocks is 18.769g
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Abstract Water “hardness” was analyzed in this experiment‚ through the determination of CaCO3 concentration. This was achieved by the titration of an unknown solution using a standardized 0.1M EDTA‚ and addition of Eriochrome Black T to the unknown‚ to indicate the endpoint of the titration. The average concentration of CaCO3 obtained was 1034 ppm‚ with a standard deviation of 2.4495. The results indicate that the unknown solution can be considered as hard water. Introduction The
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Name: Name of lab partner: Date: Title: Determination of the valency of magnesium Objective: To study the quantitative relationship between the amount of reactant and products of a reaction. A known starting mass of magnesium and the measured collection of hydrogen gas will be used to determine the reaction stoichiometry and the valency of magnesium. Introduction: In Chemistry‚ stoichiometry is the study of the quantitative relationship between amounts of reactants and products of a reaction
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three American millionaires have unfinished college education. Why are we encouraging our children and our younger generations to get college educations? Various theorist have come to the conclusion that these “get smart” campaigns were actually brought about by our own government so people can be influenced into debt with student loans. What people haven’t caught yet is that these millionaires‚ are millionaires by pure chance and. that only 1% of Americans are actually millionaires. If only 2/3 of
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CHM 3120L ANALYTICAL CHEMISTRY I LABORATORY REPORT EXPERIMENT: SPECTROPHOTOMETRIC DETERMINATION OF IRON IN DRINKING WATER Name: Steven Adrien Section: 3 Date Experiment Completed: Wednesday‚ July 17‚ 2013 1. Complete the following table Fe(II) stock solution | mass‚ g | 0.1756 | volume‚ mL | 500.0 | MW(Fe(NH4)2(SO4)2 x 6H2O)‚ g/mol | 392.14 | AW(Fe)‚ g/mol | 55.85 | conc. Fe(II)‚ ppm | 50.0 | Use Equation Editor to show how you calculated the concentration of Fe(II)
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Determination of Chemical Formulae: The Reaction of Zinc and Iodine By Sarah Abstract: The main objective of this experiment was to use to the reaction between zinc and iodine to examine the validity of the Law of Conservation of Mass and the Law of Constant Composition. The Law of Constant Composition was tested by determining the mass of each of the reactants‚ zinc and iodine‚ and comparing their total to the mass of the zinc iodide product plus the excess zinc. The total mass of the reactants
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Microbiology Lab Report II Title: Determination of a Bacteriophage Titer Purpose: To determine the number of phage particles or plaque-forming units in a suspension of T4 bacteriophage. Materials: 18 24 hour broth culture of Escherichia coli B. 2 ml suspension of T4 bacteriophages with a titer of at least 10‚000 phages/ml 5 trypticase soy agar (TSA) plates. These should be warmed to 37c before use 5 tubes of soft agar (0.7% agar). Prior
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| | 1 | 0.2123 | 0.00 | 42.34 | 42.34 | 2 | 0.2195 | 0.00 | 47.24 | 47.24 | 3 | 0.2049 | 0.00 | 26.65 | 46.65 | After Boiling | 1 | | 31.52 | 32.22 | 0.70 | 2 | | 29.34 | 30.61 | 1.27 | 3 | | 30.61 | 31.52 | 0.91 | Week 2: Determination of Sodium Carbonate in the unknown via titrating using bromocresol indicator Sample number: SC 8 Table 2: Titration of the unknown using hydrochloric acid Trial | Mass of unknown (g) | Burette reading (before boiling) | Final Volume
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