Nail polish remover contains the mixtures yellow dye, water, gelatin, fragrance, propylene carbonate and glycerol. So you have to do the heating by immersing a 25 Mk flask into the beaker with water filled into a hot plate. Experimental Procedures 1. First you have to set the distillation apparatus up. Use the ring stand & clamps to support the apparatus.
If contact occurs, wash the contacted area immediately with cool water. Add 2 drops of acetone to tube 1,2 drops of butyraldehyde to tube 2, 2 drops of flavoring agent to tube 3, 2 drops of your unknown to tube 4. Mix well by agitationand noth the almost instantaneous formation of precipitate in tubes 1 and 2. Record all your observations for samples in table 20.1. B. Tollens Reagent.
2.When crucible is cool transfer it to the balance using tongs. (While holding wire gauze under crucible but do not put wire gauze on the balance). 3.Measure and record the mass of the covered crucible. 4.Repeat steps 1, 2, and 3 until the masses differ by no more than +/- 0.001g. Record the average value of these masses.
Gently stir the pellets until the acid is dissolved by shaking the the apparatus. Lift the calorimeter lid and wash out its contents and the thermometer. Repeat this experiment using 50.0 mL of 1.0M acetic acid. Repeat experiment using 25.0 mL of each 2.0M sodium hydroxide and 2.0M acetic acid. Data Table(s): Reaction equation Mass of solid NaOH Initial Temp.
Five drops of hydrochloric acid were dropped into a well. 3. Into a clean dropper, antacid A was drew and dropped into the hydrochloric acid and mixed thoroughly with a clean stirring rod. 4. The pH of the solution was then taken by using Ph paper.
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.
Neutralization Osaji Obi 3/28/2013 Introduction The objective of this experiment is to determine the neutralization curves for weak monoprotic and polyprotic acids, and to learn potentiometric pH measurement. Pka is also needed to be determined by the equation of –log(Ka). To find that we use half neutralization and titration with a strong acid. Procedure The solution is diluted to the mark with distilled water. A burette with the standardized NaOH solution is filled.
A melting point will be ran on the aspirin when completely dry. A capillary tube containing the dry aspirin will be placed into the melting-point apparatus. This process is to determine the melting point range of aspirin. First, a hot water bath was created with a 400. mL beaker on a hot plate. The temperature was raised to 70 degrees Celsius and 4.419 g of salicylic acid was measured out on a balance and transferred into a 125. mL Erlenmeyer flask.
Experiment 4: Recrystallization of Pure Phthalic Acid, Benzoic Acid, and Naphthalene Experiment 4: Recrystallization of Pure Phthalic Acid, Benzoic Acid, and Naphthalene Introduction: This experiment involves the technique of recrystallization by utilizing the compounds phthalic acid, benzoic acid, and naphthalene. Recrystallization is an effective method in purifying solid organic compounds. It is useful for a majority of solid organic compounds at room temperature. Selecting the appropriate solvent in the recrystallization process is a crucial step. Organic compounds tend to be more soluble in hot solvents than in cold solvents.