The purpose of the laboratory is to determine the number of waters of hydration in aluminum potassium sulfate as well as the purity of the Alum we produce. Experimental1: The procedure for this laboratory was followed closely from Professor Abrams’ lab manual. In Part 1 of this laboratory an aluminum soda can was cut apart and the paint and lacquer was rubbed off with steel wool. Next, the aluminum can was rinsed off with tap H2O and then cut into small pieces. Using the analytical balance 1.0537 g of the aluminum can was weighed out.
Radu Purtuc | Chemistry 231 - Lab | Section 32 Ronnie :: team-member TECH 705, SEPARATING ACIDS AND NEUTRAL COMPOUNDS BY SOLVENT EXTRACTION - MACROSCALE EXTRACTION July 6, 2006 Lab Report INTRODUCTION Purpose: using extraction technique to separate acetanilide, p-toluic acid, and p-tert-butylphenol; then measure the melting points of each compound and comparing them to the statistical values. Background: separating acids and neutral compounds by solvent extraction is a useful technique used in practice by chemists to separate organic compounds from mixture of other compounds. It generally involve several steps, with limiting factors being the number and output purity of compounds to be extracted from source mixture. A number of specific compound solvents not inter-miscible are used to separate and dissolve compounds, and a physical transfer between solvents is employed. An example of use is cleaning compounds of impurities, where different solvents work as a molecular filter that interacts differentially with compound and impurities respectively.
What are the identities of the substances found after electrolysis and heating? The identities of the substances found were Iodine, Iodide ion (I-), Triodide ion(I3-), Zinc metal and Zinc ion(Zn2+) Post Lab questions: 1. What did this experiment convincingly show about the composition of the white solid? I put that the experiment showed us the white substance was comprised of Zinc ions and iodide ions, and that the two ions and be separated back into their respective elements 2. During the electrolysis, a gray solid formed on the negative wire of the battery and the dark red solution formed at the positive wire of the batter.
This technique can be used with aluminum cans but only after removing the exterior paint and the interior plastic coating. Alum is a chemical used in a myriad of applications including water purification, marble cement, explosives, tanning, hardening gelatin, baking powders, clarifying sugar, hardening plaster casts, and as a medicinal astringent. In this experiment, you will produce alum from an aluminum can in a multi-step synthesis reaction summarized by equation 1. You will then purify the alum through a process called recrystallization and
Akella Turnbull Date: February 2, 2015 Lab Partner: Shubh Rana South Street Seaweed Seaport Lab Summary: In this lab, we were able to make our own tinctures of iodine by extracting iodine from a Japanese seaweed, referred to as Fucus seaweed. We were able to conduct a hot water extraction from this seaweed in order to isolate the iodide, which is a solution that can be used to manufacture a pharmaceutical product. In order to prepare a tincture of iodine for testing we had to use a balance, ignite a Bunsen burner, and heat and filter a solution. In doing so, we had to prepare 6 grams of dry seaweed by cutting it into ½ inch pieces and placing it into a beaker filled with ¾ distilled water. Then after agitating the seaweed to remove monosodium glutamate and pouring off the water, 40 mL of distilled water was added to the seaweed and heated.
iLab, Week #2 CATIONS AND ANION LAB Introduction The purpose of the lab experiment is to demonstrate a double-replacement reaction of ionic compounds using a Erlenmeyer flask and a Buchner funnel with potassium chromate and lead nitrate. Also to show the relationship between anions and cations in a lab environment. Mixing the two ionic compounds: potassium chromate and lead nitrate caused a reaction to occur, forming a precipitate. The precipitate formed because these two reactants are not water soluble. The precipitate was the combination of lead nitrate + potassium chromate + the mixture of the two + lead chromate; or Pb(NO3)2 + K2CrO4 --> 2 KNO3 + PbCrO4 (I learned the above from the iLab overview and ChemLab introduction) Procedure Step 1: I added 50 ml of potassium chromate to 1M solution in a 100 ml beaker.
Hydrate Lab The purpose of this lab is to analyze the percent water in a crystalline hydrate and to indentify the hydrate from a list of possible unknowns. The solid hydrate will be heated to remove the water, and the percent can be found by measuring the mass of the solid before and after heating. The hydrate will be indentified by comparing the percent water in the hydrate with the percent water calculated for the possible unknown. Before the lab there are pre-lab questions: 1. Describe the three general safety rules for working with a Bunsen burner.
For example, if you mix aqueous solutions of AgNO3 and NaCl, there are two new combinations of ions possible. The silver nitrate solution contains Ag+(aq) and NO3-(aq). The sodium chloride contains Na+(aq) and Cl-(aq). Possible new combinations of these ions are AgCl and NaNO3. Note: these formulas would have been written in the upper right hand corner of each box before beginning the lab.
Objective The objective of this lab is to find the formula of an ionic compound. Materials: Copper Chloride Iron Chloride Sodium Hydroxide Well plate Indicator Toothpicks safety goggles pipets Procedures - collect materials label pipets according to the solutions inside. (CuCl, FeCl, NaOH, and the indicator) Using the pipet with the CuCl place 5 drops in the 5 wells in the well plate. Place one drop of indicator in those 5 wells. Starting on the 1st well place one drop of the NaOH at a time and mix with a toothpick until the NaOH has dissolved.
h) A way to make hard water softer is to put an sodium nitrate and create a precipitate to mellow out the reaction. Another way of making it softer is by removing the calcium ions one way of doing that is by boiling the solution to take out some of the ions. Conclusion: Overall, we determined that sodium carbonate, Na2CO3, is the anion that can be used to precipitate the most metal cations. Also, we learned that the anion sodium chloride, NaCl, could be used to remove silver ions from solutions. The stuff that I found interesting was that how many colours you can get when you mix the cations and anions