| Experiment #3Weight of Zinc: 2.0 gramsWeight of Iodine: 1.1 gramsExperiment #6Weight of Zinc: 2.02 gramsWeight of Iodine: 2.5 grams | 3. Then add 5 mL of acetic acid (acidified water) into the “R” boiling tube, and then after you pour it swirl vigorously. Continue swirling until the tube turns back into room temperature. Then you have to decant the solution in boiling tube “R” into boiling tube “P” without any granular zinc leaving boiling tube “R”. Then wash the zinc in the boiling tube “R” by adding 5 mL of acidified water, swirling and then decanting the solution into the “p” boiling tube.
| Experiment #3Weight of Zinc: 2.0 gramsWeight of Iodine: 1.1 gramsExperiment #6Weight of Zinc: 2.02 gramsWeight of Iodine: 2.5 grams | 3. Then add 5 mL of acetic acid (acidified water) into the “R” boiling tube, and then after you pour it swirl vigorously. Continue swirling until the tube turns back into room temperature. Then you have to decant the solution in boiling tube “R” into boiling tube “P” without any granular zinc leaving boiling tube “R”. Then wash the zinc in the boiling tube “R” by adding 5 mL of acidified water, swirling and then decanting the solution into the “p” boiling tube.
Copper (II) sulfate is a bright shade of blue, and very toxic to the environment, irritating to the eyes and skin, and also can cause damaging effects if swallowed. The lab involved calculations with mole ratios, the mass of water, and comparing the actual and theoretical masses. Also this lab dealt with determining the mass of the compound before and after heating had occurred. PURPOSE The purpose of this lab is to determine the mass of water that is contained in a sample of a hydrate of copper(II)sulfate MATERIALS •large test tube •utility clamp •iron stand •bunsen burner •flint lighter •balance •hydrated copper(II)sulfate •stirring rod PROCEDURE 1. The mass of a clean dry test tube was accurately measured.
Experiment #4 3-12-2013 Title: Thin-layer and Column Chromatography Objective: Chromatography is a technique used for separating mixtures. In this experiment, column chromatography was used to separate fluorene from an oxidation product, 9-fluorenone. The purity of the compounds was determined using thin-layer chromatography. A UV lamp was used to visualize the developed TLC and the retention factor measurement for each substance. Material Data Table CompoundName | Molecular Weight (g/mol) | Melting Point (oC) | Boiling Point (oC) | Fluorene | 166.22 | 116-117 | 295 | 9-Fluorenone | 180.19 | 83.5 | 342 | Procedure/Observation: 1.)
Carbohydrates- In this experiment We test for starch. We pour drops of Iodine onto the different liquids. If starch is present the liquid is to turn a blue/black color. Lipids- In this experiment we are testing for lipids. We pour a drop or two of water onto one piece of paper bag and another drop of oil onto a different piece of paper bag.
Therefore, acetic acid was used for this experiment. It reacted with the sodium hypochlorite to give hypochlorous acid, which thenreacted with the oxygen of the alcohol. Steam distillation was used to isolated product, and then was extracted into the distillate with ether with the addition of dying agent calcium chloride. Finally, the ether was removed to get the product, cyclohexanone with the "salting out" process. The process of salting out was used to separate cyclohexanone from the aqueous solution to purify the product.
Measuring Cylinder (1) f. Beaker (1) Results Table: Name of Compound | Observe atomic admission | Calcium Chloride CaCl2 | The flames turned into an orangey color then gradually turned redish brown with a bit of orange. | Barium Chloride BcCl2 | The flames turned into yellowish color then it became whitish and brownish and eventually turning green. | Magnesium ChlorideMgCl2 | The metal salt bubbled when it hit the flames then its flames turned orange and yellow. And the substance that is left on the spatula turned into a glue like white mask. | Nickel ChlorideNiC12 | The substance was green originally but turned yellow after being exposed to the flames.
The aspirator was turned on and 4mL of 6M HNO3 was slowly added to the beaker. Once the copper was completely dissolved in the aqua-blue mixture, 10mL of distilled water was added to the beaker. While stirring the solution 6M NaOH was added drop wise until placing a small drop of the reaction solution on red litmus paper turned the paper blue. The solution was then heated on the hot plate, with continuous stirring until the solution turned black. Once the solution was black, the solution was removed from the hot
Observations of Chemical Changes Purpose: To examine the reactions of chemicals and see what types of changes can occur. Procedure: I used a 96-well plate and the following chemicals to document the chemical changes that occur: Ammonia, Bromthymol Blue, Copper (II) Sulfate, FDC Blue dye #-1, Hydrochloric Acid, Lead (II) Nitrate, Phenolphthalein Solution, Silver Nitrate, Sodium Bicarbonate, Sodium Hydroxide, Sodium Hypochlorite, and Starch Solution. Data Tables: Well #/Question | Chemicals | Reaction | A | NaHCO3 and HCl – CO2 | Bubbles formed | B | HCl and BTB | Turns a yellow/orange color | C | NH3 and BTB | Turned to orange | D | HCl and Blue Dye | Turns green | E | Blue Dye and NaOCL | Stayed blue | F | Kl and Pb(NO3)2 |
ABSTRACT Isopropyltoluene isomers were synthesized through the friedel-crafts alkylation of toluene with 2-chloropropane in the presence of aluminum chloride as a catalyst. Through extraction of the distillate with water and 5% NaHCO3, followed by a fractional vacuum distillation, the desired aromatic organic compound was isolated. Infrared Spectroscopy and Gas Chromatography were used to analyze the composition, purity and to confirm the identity of the prepared product. The sample weighed approximately 2.66g, which reflected a low yield at 47%. However, from the GC the area % (also known as percent purity) was 91.8%, which indicates that a very pure product was obtained.