Materials: 1) Beakers 2) Water 3) Plastic wrap 4) Rubber band 5) Light corn syrup 6) Vinegar 7) 2 raw egg (large) 8) 2 graduated cylinder (100ml, 50ml) 9) Marker for labeling cup 10) Tri Beam scale Procedure: 1) Measure 130ml of vinegar into the beaker. 2) Gently place the egg into the vinegar. Make sure the egg is completely covered by the vinegar. 3) Weigh all of the items o the scale 4) Cover the beaker with plastic and secure it with a rubber band. 5) Label the beaker with your name and period.
Amanda Luna Lab Partner: Irina Lev Experiment #9: Synthesis of Isopentyl Acetate (Banana Oil) Date Experiment Performed: March 28, 2012 Date Experiment Completed: April 11, 2012 Abstract: In this experiment was to synthesize isopentyl acetate (banana oil) by combining isopentyl alcohol and acetic acid and distilling it with a reflux apparatus. We also add sulfuric acid to catalyze the reaction. This allows esterification and ultimately the synthesis of isopentyl acetate. As usual we used a separatory funnel to separate the aqueous solution from organic solution in the workup section. We obtained 0.70g or product, which corresponded to a percent yield of 32.0%.
DNA is insoluble in alcohol, but soluble in water, so this experiment will test this scientific principle of alcohol. Also, this experiment will test a scientific principle of salt. Salt should act as a clumping agent by clumping the DNA together. The detergent should break open the cell membrane and the nucleus. This experiment will test this scientific principle.
Take one cube of agar gel of side 1cm and immerse in the measured sodium hydroxide solution 4. Cover the beaker with a Petri dish and start the stopwatch. 5. Remove the agar cube from sodium hydroxide solution and dry it with a tissue paper. 6.
LAB REPORT: Hydrolysis of Acetylsalicylic Acid PURPOSE: The purpose of this lab is to become familiar with the identification of ester, carboxylic acid and alcohol functional groups, to understand that formation and hydrolysis of esters are equilibrium processes, to understand how ester hydrolysis yields carboxylic acid and alcohol products, and to understand what a sympathetic ink is and how such inks are visualized. PROCEDURE: 1. Crushed two 325mg aspirin tablets into powder; placed the powder in a 50 or 100mL beaker; added 2 grams of sodium carbonate; then measured and added 20mL of water. 2. Stirred the mixture occasionally; covered it with plastic wrap and allowed to stand overnight in a safe place undisturbed to hydrolyze the aspirin to salicylic acid; noticed the odor of acetic acid in the beaker the following morning.
What type of building block would you use? Amino Acids 3. Digestive enzymes break down starch to what disaccharide studied in this experiment? Sucrose, Lactose, Maltose, Glucose 4. Why is it necessary to shake a salad dressing before adding it to a salad?
To obtain the caffeine, the methylene chloride was removed from the extract, leaving us with our solid caffeine residue. Sublimation: We purified our solid caffeine through sublimation. By constructing a side-arm test tube apparatus, we vaporized and condensed the caffeine using a Bunsen burner. Upon cooling, the apparatus was carefully disassembled and the sublimed caffeine was scraped off of the test-tube collection surface and weighed. The melting point range was then determined by utilizing a melting point apparatus.
As the reaction progresses, less starch is present and more sugars are being made, therefore the bread begins to taste sweet. The enzyme used in this lab exercise is amylase, which is commonly found in saliva and germinating seeds. It catalyzes the breakdown of starch. When amylase reacts with starch, it cuts off the disaccharide maltose (two glucose molecules linked together). As the reaction progresses, less starch will be present and more sugar (maltose) will be present Saliva contains the enzyme salivary amylase.
Then place the agar into the test tube including hydrochloric acid, start timing immediately by the help of a stopwatch. Observe the agar in petri dish; stop the stopwatch when the agar full changes its color to pink, which means that the hydrochloric acid is diffused into the agar completely. Record your data in a table you have made before. Repeat the experiment for each of the different sizes of agar blocks Diagram: Data collection: Dimension | Surface area | Volume | Surface area to volume ratio | Time taken for agar jelly to turn pink | Height=1 cm Length=3 cm Width=2 cm | 22 cm2 | 6 cm3 | 22:6= 3.66 | 2:45:66 | Weight= 0.5 cm Length= 2 cm Width= 1 cm | 7 cm2 | 1 cm3 | 7:1= 7 | 5:12:30 | Height= 0.3 cm Length= 1 cm Width= 2 cm | 5.8 cm2 | 0.6 cm3 | 5.8:0.6= 9.66 | 6:07:41 | Height= 0.6
According to the eighth edition of Marieb/Hoehn Human Anatomy & Physiology textbook, osmosis is the diffusion of a solvent through a membrane from a dilute solution into a more concentrated one. In the corn syrup solution, there will be a net movement of molecules out of the egg; this is a hypertonic solution, which should make the egg smaller. In the water solution, the molecules will diffuse in and out of the cell at equal rates; this is a hypotonic solution, which should make the egg bigger. Procedure: Part I of the experiment was performed by filling the holes of a petri dish filled with agar gel with dye solutions of 0.1M methylene blue (molecular weight is 374 g/M) and 0.1M potassium permanganate (molecular weight is 158 g/M). After filling the holes of the petri dish with the solution, the dish was covered and allowed to sit undisturbed for one hour.