Erlenmeyer flask

The purpose of today’s lab was to determine how effective antacids are at neutralizing HCl. This experiment required us to place 3 antacids tablets into 3 Erlenmeyer flasks. Next we were required to add 50.00 mL of 0.500M HCl and five drops of phenolphthalein. Finally, we needed to titrate NaOH into the flasks. Each antacid brand required a different amount of NaOH in order for it to be completely titrated. The data collected from the experiment allowed each group to calculate the cost…

Experiment #6: Polarimetry Resolution of (∓)-Racemate: (∓)-ɑ-Phenylethylamine OBJECTIVE All chiral molecules have a mirror image of themselves. While they have the same physical properties, they interact with other chiral molecules completely different. Since there are many chiral molecules in organics, this can lead to the need to make optically pure products. If the chemist does not, it can lead to many problems including death. In this experiment, the separation of two enantiomers was…

For the following lab, the purpose is to utilize titration to determine the amount of ascorbic acid (vitamin C) present in a substance by reacting it with potassium bromate. An oxidation reaction takes place with ascorbic acid to produce dehydroascorbic acid, using an excess of bromine. The total amount of bromine utilized during the experiment is determined utilizing a back titration, in which the bromine is reacted with bromate. One mole of bromate produces three moles of bromine and the…

The concentration that will be tested are 0.8%, 0.4%, 0.2%, 0.1%, 0.0% H2O2. First add 10ml of first H2O2 concentration to the flask and then add 10ml of catalase to the flask. After adding the H2O2 to the flask always place a rubber stopper to the flask. Swirl the flask at a constant rate and record your data. Repeat the previous 2 steps for the other substrate concentration. Now for the Experiment 2 Effect of temperature on enzyme kinetics. Repeat…

Nowadays, caffeine becomes more and more familiar to human. People intake different amount of caffeine from different foods. It becomes part of human’s daily routine. https://www.google.com/search?q=caffeine&espv=2&biw=706&bih=567&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiVmOWn1sHMAhXGuBoKHTGYAbsQ_AUIBigB#imgrc=ya-sLhS2Ae9x2M%3A Caffeine (C8H10 N4O2) a substance that has a bitter taste and is usually found in coffee, tea, soft drinks, chocolate, kola nuts, and certain medicines. It affects body’s…

Semester 2014 Co-worker: Byungsoo Kim 20140831 Date: 27.09.2014 Title:Volumetric analysis Introduction The concept of volumetric analysis is a part of chemical analysis and is performed foremost with the volumetric chemical glassware (i.e. Erlenmeyer flasks, burets, pipets, test tubes etc.). The aim is to find out the concentration of one substance by reacting it in aqueous solution with the substance with known-concentration and then determining the unknown concentration. There are two ways…

Titration is used to determine the equivalence point of a reaction, or the point when the moles of acid are equal to the moles of base in a mixture. Titration is used to determine the concentration of an unknown solution by using an already known solution. This process is important because it is commonly in the medical field. For example, pharmacists use titration in the creation of drugs. In addition, doctors also titration when determining the concentration necessary to give their patients of…

solubility test to calculate the solubility of the compound in grams per liter. We began this test my measuring out .062g of compound and 2mL of water and put them into an Erlenmeyer flask. While heating and stirring the flask we add our solution until our compound has completely dissolved. Place a watch glass on top of the flask and allow cooling until the next class. Then filter out the remaining liquid, allow it to dry and then weigh it. With this information we can calculate the solubility…

The overall objective of the experiment was to find the concentration of phosphate by using spectroscopy. Dilutions of a phosphate working solution with a known concentration were made and their absorption lengths were found using the spectrometer in order to find the concentration of the unknown phosphate sample. INTRODUCTION The goal of the experiment was to find the concentration of an unknown water sample using several standard phosphate solutions’ absorbencies and Beer’s Law. Knowing the…

INTRODUCTION Dyes exist in natural and synthetic forms in the world; they are used for the purpose of changing colors of different materials. William Perkins first discovered the azo dye on accident after adding alcohol to a product in the lab. They have the ability to do this due to the molecules of the dyes possessing conjugation. Conjugation is defined as p-orbitals overlapping which causes the electrons within to be delocalized; it is also seen in molecules and compounds that contain…