acidic solutions. This will help us observe diffusion‚ in our lab because the agar cubes- which have been made with phenolphthalein‚ and is evenly distributed through the entire agar cube. When the agar cube comes in contact with Sodium Hydroxide (NaOH) it will turn pink‚ and will continue to do so as diffusion occurs‚ and the Sodium Hydroxide solutions begins to be absorbed into the agar cubes‚ allowing us to later identify the distance the Sodium Hydroxide solution travelled over time. We want
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Benedict’s test-Non reducing sugar Food Test | Food Items | Observations | Benedict’s Test-Non-reducing sugar.2cm3 of the food was added to a test tube followed by 1cm3 of hydrochloric acid and was boiled for one minute‚ then 1cm3 of sodium hydroxide (NaOH) and Benedict’s solution were added and the solution was brought to a boil. | White BreadCheeseCake | -When hydrochloric acid and bread were mixed together‚ a cream cloudy mixture was formed. When
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The Mass of Acetylsalicylic Acid in Aspirin ------------------------------------------------- Purpose The purpose of the lab is to determine the mass of the ‘active ingredient’ in a commercial ASA tablet. ------------------------------------------------- ------------------------------------------------- Introduction There are three main theories surrounding acids and bases including the Arrhenius‚ Bronsted-Lowry‚ and Lewis theories. The Arrhenius theory of acids and bases states that
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Heat of Neutralization Lab Objective: The objective of this lab was to measure‚ using a calorimeter‚ the energy changes accompanying neutralization reactions. Background: Chemical changes are always accompanied by a change in energy‚ typically as heat. If the reaction releases heat (ΔH < 0) then the reaction is exothermic. If the reaction absorbs heat (ΔH > 0) then the reaction is endothermic. The quantity of heat is measured experimentally by having the reaction take place in an insulated container called a
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A-2 and A-3. Record your results for each trial. Note: All three titration results should agree within 1 drop of the others. If they do not‚ you have made a computation error and should repeat the titration. Calculate the average number of drops of NaOh used for the 3 trials and record. Calculate the Normality of the vinegar using the previously given equation. Calculate the mass of the acetic acid in grams using the previously given equation. Calculate the percentage of acetic acid using the previously
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tartrate solution with NaOH; Procedure : (1) Weigh out ~2.0g of finely powdered potassium hydrogen tartrate into 250.mL beaker. (2) Add 150.mL of distilled water and stir well. (3) Using a vacuum filtration‚ filter the solution into a clean‚ dry Erlenmeyer flask with a side arm. (4) Record the temperature of the filtrate. (5) Pipet out 25 mL of (4) into a 250.mL Erlenmeyer flask. (6) Put ~3 drops of phenolphthalein indicator to (5) (7) Prepare a buret with ~0.04M NaOH solution. (Make sure
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220_002 #04 FOOD & BEVERAGE A P P L I C AT I O N N O T E Page : 1 CARBOHYDRATES IN FOOD THE FINEST LC-EC APPLICATIONS FOR FOOD & BEVERAGE ANALYSIS EVER PROCESSED INTRODUCTION Carbohydrates not only provide the most easily accessible energy source for our body‚ they also play an important role in many physiological processes. They are involved in intercellular recognition‚ infection processes‚ and certain types of cancer. Carbohydrates analysis is of interest to the food industry but
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Discovering the Mystery of Eleven Test Tubes Karen Radakovich Ph.D. Mohammad Farhad Brittany Cina CH 223‚ Spring 08 Abstract: Eleven mystery test tubes labeled from K-1 to K-11 contained: 6M H2SO4‚ 6M NH3‚ 6M HCl‚ 6M NaOH‚ 1M NaCl‚ 1M Fe(NO3)3‚ 1M NiSO4‚ 1M AgNO3‚ 1M KSCN‚ 1M Ba(NO3)2‚ 1M Cu(NO3)2 respectively. The contents of the test tubes were determined by chemical experiments. Solution K-1 contained NiSO4 because when solution K-9‚ ammonia which was identified by its pungent odor
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experimentation. We tested the solubility of each of the starting and ending materials in water‚ HCl‚ NaOH‚ toluene‚ and acetone. We discovered that the starting materials would only dissolve in toluene. To make the soap‚ we obtained about 10 mL of vegetable oil and 10 g of lard and we placed them both in separate 250 mL beakers. While we were stirring the compounds‚ we also added 15 mL of 6 M NaOH drop by drop and 1 mL of glycerol. We then heated our solutions to boiling on a hot plate. Once the
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Vinegar Titration Lab Procedure: 1.) Obtain ~100 mL of NaOH. Record the molarity on the data table. 2.) Set up a ring stand with a buret. 3.) Place 5mL of vinegar in a 125 mL Erlenmeyer flask. Dilute the vinegar with 25 mL of water and add two drops of phenolphthalein. 4.) Fill the buret with NaOH. Record the initial volume of the buret in your data table. 5.) Titrate the vinegar sample until the first faint pink color does not disappear. 6.) Record the final volume of the buret in your data
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