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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An acid is a substance with particular chemical properties including turning litmus paper red‚ neutralizing alkalis‚ and dissolving some metals. It can be corrosive or it can be sour liquid of this kind. Acids are also all around us in everyday life‚ for example‚ carbon dioxide gas dissolves in rain to form carbonic acid (a weak acid). We find acids in many foods‚ such as ethanoic acid in vinegar. These acids are not hazardous. Some acids‚ which are found in the laboratory a car battery are too dangerous
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Figure 1 shows the average amount of absorbance for each tube‚ containing different levels of pH. Tube 2 had an acidic pH level‚ Tube 3 had a neutral pH level‚ and Tube 4 had a basic pH level. It is indicated that the absorbance rates were the highest for the neutral pH level‚ with a final absorbance rate of 0.166. This was followed by a basic pH (0.106). The acidic pH level had the least amount of absorbance with a final absorbance rate of 0.069. This reinforces the idea that the ALP enzyme worked
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