7. RESULTS AND DISCUSSION 7.1 Identification and characterization of model drug 7.1.1 Description: A pale yellow‚ crystalline powder having bitter taste. 7.1.2 Melting point: The melting point of model drug was found to be 318ºC which confirmed the purity of model drug. 7.1.3 Solubility: Solubility of model drug in distilled water was found to be 10 mg/ml. 7.1.4 Ultraviolet spectrum: The λ max of model drug in 0.1N hydrochloric acid 278nm. Figure 7.1: UV Spectrum of model drug in 0.1 N HCl The
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Procedure: Day 1: Buffer preparation First‚ the buffer was prepared by using the formula as follows: Figure 1: Calculation for prepare 0.5 M Tris buffer at pH 6.8 3.033 g of Tris was weighed and placed in 400 mL beaker. Then‚ 25 mL of distilled water was added into the beaker that contained Tris. The mixture was dissolved using the stirring rod‚ and then the magnetic stirring bar was placed in the beaker for further dissolve when measuring the pH. The pH meter was used to measure the solution
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This lab focused on three factors affecting reaction rates‚ temperature‚ surface area‚ and concentration. Our first experiment (table 1) looked mainly into the effects of temperature on the reaction rate. To see how different temperatures would change the reaction rates we had three flasks all containing varying temperatures of water(H20). One with cold water (4°C)‚ one room temperature (21°C)‚ and one with hot water (44°C). In each flask‚ we dropped one tablet of Alka-Seltzer‚ all within 0.008 grams
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Ryan Tudino Mrs. Couchon Biology Honors/ 1A 10 April 2013 Abstract The seeds of summer squash (Cacurbita moschata)‚ beet (Beta vulgaris)‚ and pepper (Capsicum annuum) are all dicot plants‚ which mean that they have two seed leaves inside the seed coat. When they are placed in an environment and are watered with solutions of different acidic and alkaline levels‚ the root growth during germination is affected. The purpose of this experiment was to observe what type of substance‚ acidic or basic
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Preparation of PoPD fabricated of Mg-Al layered double hydroxides 0.356 g of Magnesium nitrate (0.3 M) and 0.169 g of Aluminium nitrate (0.1 M) solution were containing in 100 ml beaker with continuous stirring (1:3 ratio) and followed by 0.700 g of urea (0.5 M) was added into the solution. The reaction mixture was maintained basic medium using 1 g of NaOH solution was added drop by drop into the above metal solution. The mixture was stirred for 30 min and the precipitate was poured into the 50
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Test Paper Chemistry Section 1 : Multiple choice‚ circle the best choice A‚ B‚ C‚ or D in each questions. Each Question Carries 1 mark 1. Which of the following processes do water molecules gain heat? A. Melted ice cream freezing when put in to refrigerator B. Water droplets forming on outside of a cold can of soda C. Icecube melting when left outside D. Water droplets forming on a window on a cold day 2. Which of the following properties should a sponge have to carry out its functions
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Spectrophotometric determination of Ascorbic acid Concentration in an Unknown Solution Introduction: The naturally occurring organic compound with antioxidant properties is Ascorbic acid shortly referred as (AA). Normally the color of Ascorbic acid is white‚ but in some cases of impure samples it appears yellow in color. Ascorbic acid is solid in state. In water it dissolves well to give mildly acidic solutions. Ascorbic acid is one form ("vitamer") of vitamin C [1]. So‚ Ascorbic Acid (AA)
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Aim: To react NaHCO3 with HCl to form NaCl and two other products and then calculate the mole relationships between NaHCO3 and NaCl and calculate a balanced equation for this reaction. Safety: • Wear safety goggles at all time • Handle all chemicals with care • Use equipment like tongs when handling warm/hot objects • If chemicals are spilt on self‚ wash off immediately • Stand at all times Hypothesis: The NaHCO3 will react successfully with the HCl and will form NaCl‚ H2O and
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Lloyd Term 2‚ 2014 Lauric Acid Experiment Teacher: Mr Oliver Contents 1.0 Introduction Elements and the compounds can exist in distinctive physical states. Liquid‚ solid‚ gas and plasma. Every element and compound has a distinctive melting and boiling point. When a substance reaches its melting and boiling point it will change phase. For example the molecules in a solid being heated gain energy and eventually are able to not only vibrate but
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Experiment #5: Acid Burn!!! Introduction The goal of this lab was to correctly prepare a 0.2M solution of NaOH‚ identify highly acidic household cleaning chemicals‚ and determine their concentration (molarity) through titrations using the previously prepared 0.2M NaOH solution. Experimental First‚ to create 0.5L of 0.2M solution of NaOH‚ standard 3M NaOH solution was obtained. Next‚ calculations were performed to determine the amount 3M NaOH necessary to create 0.5L of the 0.2M solution and‚ as
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