Materials • Samples of different types of milk • Benedict’s Reagent • Biuret Reagent • Sudan III • Water bath • Pipettes/syringes • Test tubes • Microscopic slides and cover slips • Microscope Method (testing for reducing sugars) 1. Add 3cm³ of whole milk‚ by using a pipette or syringe to the test tube. 2. Add 5cm³ of Benedict’s reagent and place it in the boiling water bath for 8 minutes. Do the same for semi-skimmed milk and skimmed milk. 3. Once all 3 of the test tubes are
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30minuites. 5. After 30minutes‚ shake the test tube gently to make sure any pigment is well mixed into the water‚ and then remove the beetroot cores from the test tube. 6. Pour a third of the beetroot water into a‚ and place it into the colorimeter. 7. Record readings. 8. Repeat steps 2 to 7 two more times. Materials 1. A beetroot 2. A cutter 3. A ruler 4. 3 x 25mL test tube 5. Hot water bath 6. Distilled water 7. Paper towel 8. 1 x 50mL beaker
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flow downstream into the rivers and lakes‚ resulting in exceedingly high barium levels in the water. This can cause high amounts of contamination in not only the lakes but drinking water reservoirs. Three separate trials were conducted using the colorimeter and a BariVer Barium Reagent Powder Pillow mixed with the water sample. The tests produced results of 2 mg/L‚ 1 mg/L‚ and 1 mg/L. It was decided that another test must be done to get the most precise results as possible‚ giving 1 mg/L. With three
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Lab Report Introduction This lab has the following two concepts: synthesis of acetylsalicylic acid and analysis of acetylsalicylic acid. Synthesis is a purposeful execution of chemical reactions to obtain a product. This concept is used in the first part of the lab; when we have to produce crystals of aspirin. Analysis is the separation‚ identification‚ and quantification of the chemical components of natural and artificial materials. This concept is used throughout the lab when we are analyzing
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These measurements help in the registration of the characteristic reflectance spectra and the detection of the chromatic alterations. Measuring devices‚ such as spectrophotometers and tristimulus colorimeters‚ provide a numeric expression of color that is based on mathematical conversions of tristimulus values. Also‚ measurement reproducibility is also greatly affected by surface uniformity‚ which is significant‚ as surfaces of wall paintings tend to
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General Chemistry II Determining of the equilibrium constant for the formation of FeSCN2+ Introduction The objective of this experiment was to determine the equilibrium concentration and then determine Kc. A dilution calculation was formed to determine the concentration of SCN- and Fe(SCN)2+. Each cuvette was filled to the same volume and can be seen in table 1. Then the absorbances were recorded from each cuvette and can be seen in table 1. A Beer’s law plot was made from the data that was recorded
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DATE PERFORMED: JULY 20‚ 2007 SPECTROPHOTOMETRIC DETERMINATION OF EQUILIBRIUM CONSTANT FOR A REACTION ABSTRACT UV-VIS spectrophotometry is one of the most widely-used methods for determining and identifying many inorganic species. During this experiment‚ this spectrophotometry was used to determine the equilibrium constant‚ Keq‚ of the Fe3+(aq)+SCN-(aq)↔ FeSCN2+(aq) reaction. By determining the amount of light absorbed‚ the concentration of the colored FeSCN2+ solution was also quantitatively
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Investigating Aspirin Aims Synthesize my own aspirin Analyse the purity of my aspirin samples (aspirin and recrystallized aspirin) compared to commercial aspirin by use of analysing melting points‚ TLC plates and colorimetry tests Investigate how pH effects the rate of hydrolysis of aspirin Background theory Making my own sample of Salicylic acid (to then be converted into Aspirin) Salicylic acid (2-Hydroxybenzoic acid) can be made by hydrolysing methyl 2-hydroxybenzoate. Oil
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Recognizing Faces Donna Bryant April 22‚ 2013 PSYCH/560 Brian Uldall‚ Ph.D. Recognizing Faces As people age‚ they want to remember things from his or her past. The mind ages as the body does. As one grows older‚ the physical and mental changes start to appear. This paper will evaluate face recognition‚ identification‚ and classification on it. The second part will explain the role of concepts and categories in face recognition. The paper will evaluate the role of encoding and retrieval
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Expt. BL 304 Kinetics of Alkaline Phosphatase Objective To study the kinetics of alkaline phosphatase. Procedure 1. Sodium carbonate - sodium bicarbonate buffer: Dissolve 20 ml of 0.2 M solution of sodium carbonate (2.12 gm in 100 ml distilled water) and 230 ml of 0.2 M sodium bicarbonate (4.12 gm in 250 ml distilled water) to make up the volume 250 ml with pH 9 -9.2 2. 5 N sodium hydroxide solution (10 gm in 50 ml distilled water) 3. Substrate stock solution: Dissolve 0.1 gm of p-nitrophynyl
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