In the fume hood‚ approximately 2g of Ca(OH)2 was dumped from a vail into a 250ml beaker. To avoid any left-over Ca(OH)2 inside the vail‚ certain amount of distill water wad added to it‚ and the vail was shook several times after the lid was closed. Pouring the solution in the vail into the beaker‚ and add distill water until it reached the 100ml line. Then‚ the beaker was put on top of a magnetic stir with a magnetic stir bar placed in it. Turning on the magnetic stirrer and allowing the stir bar
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Calculations Mass percent of water in CuSO4·5H2O using experimental data: (mass of water lost / mass of hydrated salt) x 100 (0.658 / 2.009) x 100 = 32.75 % Mass percent of water in CuSO4·5H2O using theoretical data: (90 / 249) x 100 = 36.14 % Percent error using experimental and theoretical mass percentages: (experimental value – theoretical value / theoretical value) x 100 (32.75 – 36.14 / 36.14) x 100 = 9.38 % Average percent water in CuSO4·5H2O using experimental values: (trial 1 % water +
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The purpose of this experiment was to discover the suitable ways of organizing experimental data in the form of tables and graphs by proficiently using Microsoft Excel. After being provided with a set of experimental data‚ a graph is then created. The graph contains useful information such as the slope‚ which could give the density value. The calculation of significant figures was one of the key objectives in this lab as well. Significant figures are essential to interpreting data because they allow
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Mass of the candle was measured before proceeding to further steps. 100 mL of chilled water‚ which is 10-15 ºC colder than the room temperature‚ was prepared and was poured into the empty can. An apparatus was installed with a stand and a holder. The can was placed hanging on the stand by a glass rod (the rod went through the hole of can’s handle (?) and was placed above the holder). The candle was installed right below (about 2cm below) the can. The room temperature and the water temperature were
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Determination of the molar mass of carbon dioxide Purpose: The purpose of the practical that we completed was to determine the molar mass of carbon dioxide (CO2) by experimental means and to observe the reaction of hydrochloric acid and sodium carbonate. Using the balanced equation: Na2CO3 + 2HCl → 2NaCl + H2O + CO2 Materials / Apparatus: 1) 8.00g of sodium carbonate‚ 2) 30mL of hydrochloric acid (6molL-1) 3) 100mL of hydrochloric acid (6molL-1) 4) 100mL conical flask‚ 5) 150mL glass beaker 6)
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EXPERIMENT 2 : UV-VISIBLE DETERMINATION OF AN UNKNOWN CONCENTRATION OF KMnO4 OBJECTIVE 1. To determine the maximum wavelength of potassium permanganate. 2. To plot the calibration curve of potassium permanganate. 3. To determine the concentration of an unknown solution of potassium permanganate. APPARATUS Beaker‚ burette‚ glass rod ‚volumetric flask 100ml ‚dropper CHEMICALS Potassium permanganate (KMnO4)‚ distilled water PROCEDURE A. Preparation of the KMnO4 standard solution
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Aims To investigate the effect of varying the concentration of H2O2 has on the reaction‚ and to determine the respective order of reaction. To investigate the effect of varying the concentration of KI has on the reaction‚ and to determine the respective order of reaction. To investigate the effect of varying the temperature has on the reaction‚ and to determine the respective order of reaction. To investigate the effect of introducing Ammonium Molybdate to the reaction Arrhenius stuff
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Analytical Chemistry Spring 2014 September 2nd‚ 2014 Pre-Lab 1: Calibration of Volumetric Glassware Objective: The sole objective of this lab is to become acquainted with the scientific techniques that are utilized in this lab including: data analysis‚ analytical balance‚ and use of glassware and lab materials. To demonstrate these basic concepts‚ a 50 mL buret and 10 mL volumetric flask will be calibrated. Apparatus: Procedure and Equipment: The following equipment
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1.2.4.4 Sub-criteria standardization The standardization process consisted in conversing cell values of the sub-criteria layers into a common [0-1] scale. The minimum 0 corresponds to the less desirable condition with regards to aquifer recharge with reclaimed water and 1 the most desirable condition. The cell values of all continuous numerical sub-criteria (e.g. slope‚ soil salinity and unsaturated zone depth) were rescaled using fuzzy linear membership functions. For categorical layers (e.g. soil
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Succulence was determined according to the following equation: Succulence = Fresh Weight/Oven Dry Weight…………………........................................................(1) Measurement of Relative Water Content (RWC%);Relative Turgidity (RT %): Relative water content was estimated according to a modification of the method of Weatherly (1950); Weatherly and Barr (1962); Slatyer (1957);Fletcher et al. (1988)on the final day of the experiment and was calculated by the formula given byKramer (1983).Detached
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