Mystery Powders Lab Report

First, the iodine test was preformed. Two grams of the unknown mixture were put into two different divots. A drop of iodine was put into one divot. Since the mixture turned blue-black, the powder was corn starch and the vinegar test was not necessary. Then, the flame test was preformed. The unknown mixture was put into a vial which was then filled with water. The vial was shaken until the mixture dissolved. Once it was fully dissolved, the mixture was poured through a paper filter into a test tube in order to remove the corn starch. A platinum rod was dipped into the test tube. The platinum rod was then placed over a lit bunsen burner. The color of the flame was

Starting our hypothesis was that it was cornstarch, according to all of the data we collected in table 2(example at bottom of page). When we just looked at the substance it had a powder like appearance with no real specific way of being arranged. Then we started with each test of the powder first the simple close up look test using the microscope this showed us basically what we had seen with our eyes in a little more detail from this we found that it was what we had seen a powder like substance with no real arrangement but the only difference was two crystals within the powder. Next we moved on to the more complex test like the vinegar test in this test when the vinegar was mixed with the substance it did not really mix at all the vinegar

2. Measure 5mL of a solvent (water) and pour into different test tubes 6 times using a measuring cylinder.

Gather materials (HCL acid, Mg strip, balloon, test tube, scales, test tube rack, beaker, scalpel, tweezers, lab coat, safety goggles, tape measure), and set equipment up ready for the experiment.

Then that morning we worked on trying to replicate the Mystery Mixture and trying to replicate that. Then as that class went on then a few more people got confident with their mixtures that they had. Then than we also had a dissection that day to find out what all of the class think that they can do net to find out then they said what about putting water or some other substance to it. Then Mrs.Riorsion said I’ve got some water that the class can use so that is what we can use to see what that can

The materials needed for this lab was a graduated cylinder, a cup, two pipettes, soap, tap water, and paperclips.

Return the petri dish to the teacher for disposal and begin working on the formal lab write

Refer to the Lab Manual for Part A and B and the Cleanup pages 2-3 and 5.

* With a glass rod lift a drop of the starch solution from the test

The vinegar test would be just looking to see if theirs carbon dioxide. The iodine test would be seeing if there's any starch. And finally for the heat test we would be looking for noise, if the powder was on fire, smell, and the shape it made if burnt onto the foil spoon like if just went around the edges. It is important to support your hypothesis by going to check all your data you wrote down because your hypothesis might be right. And you can also go back and retest some powders just in case to see if you actually got the right information. Some precautions I took to avoid contamination was to not let the iodine get on my fingers or my hands. And to try not to touch any of the powders that got tested on. Like for example iodine was in powder “A” and I was the one mixing it I would probably not try to get it on my fingers because iodine is a poisonous substance. To improve this lab, I would probably do nothing because my group and I got the lab to sun smoothly. We got the lab to run smoothly by following directions and not fooling around with the foot powders and the

On WHITE PLATE place a drop of the INDICATOR SOLUTION and dip the DRIED TEST SWAB into the drop SOLUTION MIXTURE and allow for soaking up of the liquid.

In order to perform this experiment, proficiency with using spectrometers, burettes, volumetric flasks, weighing by difference, and making a hot-water bath are essential1.

Place an aliquot of distilled water into a clean beaker. Use the beaker to pour the exact mL of distilled water into the graduated cylinder. It helps if you use a long-stemmed pipet to control the water when the solution is close to the mL mark. Pour this aliquot of distilled water from the graduated cylinder into the dropper bottle containing pre-measured alpha amylase powder. Carefully replace the dropping tip, still covered with foil or plastic. Remove the

3. In one of the test tubes add sugar and mix it in with the water

This labaratory report shows that when presented with an unknown chemical substance, identification of that substance is revealed through a seires of tests that involve chemical and physical properties of that substance.