10 Drops Of Cyclohexane, KI And Benzoic Acid

7. Using the slider on the right hand side, add NaOH to the HCl in the Erlenmeyer flask (This action is known as titrate). Add the indicator until the color of the indicator turns a light shade of pink.

The wet, crude product was placed into the 50 mL Erlenmeyer flask. Small amounts of CaCl2 were added to dry the solution. The flask was sealed and the mixture was swirled and left to settle. Once

Carefully fill a small test tube ½ full of bromothymol blue and mix it with the citric acid in the corner of the zip lock bag. Record your observations.

Introduction The Purpose of the experiment was broken into two parts both having to do with the purification and separation of different compounds and impurities. In part A was the distillation of cyclohexane and in part B it was about taking a 50:50 mixture of dichloromethane and cyclohexane and separating them through fractional distillation. Experimental Refer to Chemistry 2513 Lab Manual Introductory Organic Chemistry Part 1 Fall 2014. Look for this experiment between pages 21-24 Results Observations:

The distillate was swirled and mixed and was transferred to an Erlenmeyer flask. CaCl2 was added to the flask so it can absorb any water which formed as the by product. Next, the product was transferred into a vial without the CaCl2

2. Add 4 drops of indicator into the flask and titrate to the first permanent appearance of pink. Near the endpoint, add the NaOH dropwise to

In test tube 1 add 5mL of water, 10 drops of water and 20 drops of Benedict’s solution

Place the evaporating dish onto the scale and zero-out the balance. Pour three grams of the NaCl, NH_4 Cl, and SiO_2 mixture into the dish.

Experiment 2: The second experiment methods and materials are listed in the lab manual Wolven, 2014; Montezuma

Fill plaster water bottle with 500ml of salt solution wudion a funnel and label it “salt”

1. Number four clean test tubes 1-4. 2. Place 1 ml (or 20 drops) of the following solutions into each tube: water, egg albumin, starch, and chicken broth. 3. Add 3 drops of Buiret reagent to each tube and gently shake

7.When water bath is ready, put each test tube into the water bath. Wait 5 minutes.

4.Measure 35mL of warm water and add them into each of the 4 test tubes at about roughly the same time. It is essential that the water is warm. Do not seal the test tube.

Collect to 2 large beakers both large beakers are to be filled with hot water (labtutor). Then obtain seven conical tubes these will be used to collect the levels of gas, you will also need test tube a stopper and a plastic tube (labtutor). You want to fill the conical tube to at least 50 ml of water (Cressy). Take the four conical tubes filled with water and place two in each beaker, to do this you must invert the tube and cover the release hole as to not lose any water (Cressy). Then place the beakers with the tubes in the bath so they can be at the same temperature as the bath (Cressy). Next mark all of your test tubes in number order to be sure which tube contains what concentrations and pH (Cressy). Having mixed a solution to the specifications of 2.5 ml of glucose in all tubes, 3 ml of yeast in 2 tubes of pH 5, 2 tubes of pH 9, and the single pH 7 tube, the remaining two tubes will contain no yeast as they will be negative controls. Next add 2 ml of pH buffer 3 tubes will receive pH of 5, three will receive a pH of 9 and a single tube of pH 7. Finally add pure water to make sure all test tubes have 10 ml of solution. When making the solutions

by measuring them in various experiments. All of the students tested their reactions by using