The aspirator was turned to medium high, and then the copper was poured onto wetted filter paper. Using distilled water to remove all copper from the beaker. Once completely on filter paper 6mL of acetone was added to the copper to help dry it out. The filter paper was then removed and set down to dry completely. Once dry the filter paper was weighed with the copper on it and subtracted from the original weight to see the amount of copper left after
The acid was poured into the flask until there was a permanent pink colour. The acid was allowed to be poured for a little longer before the flask was removed and taken to a lab bench with a buret that contained 0.1 M sodium hydroxide, and the amount of acid used was recorded. The sodium hydroxide was added into the flask in small amounts
B.Pt: I poured rubbing alcohol in a beaker and rubber banded it with the thermometer. I logged the last bubble that came out of the capillary tubes. After that I crushed the acetamide and carefully put it in the capillary tube I banded it to the thermometer and logged when the acetamide. 2. M. Pt: I put gloves on and inserted acetamide into the end of the 2nd capillary and moved the powder towards the end of the tube and repeated it until it was ¾ quarters down.
The purpose of this lab is to focus on how to make zinc iodide in a different way using compounds instead of elements, which are barium iodide and zinc sulfate. We will see if the reaction between these two compounds will occur and make a prediction by writing a chemical equation. The procedures for this lab are to place a small test tube inside a 50mL beaker and weigh it. Then, using a spatula, add 0.45±0.03 g of zinc sulfate heptahydrate into the small test tube and record the mass. After that, dissolve the sample in 2 mL of deionized water and shake the test tube for 1 to 1 ½ minutes to dissolve the solid.
Paper chromatography can be used in separating amino acids and anions, RNA fingerprinting, and testing histamines and antibiotics. (Infromation received from sonic.org Purpose The purpose of this experiment was to separate the dyes that these markers are composed of and show how chromatography works. Materials * Four different markers (including one black permanent marker) * Rubbing alcohol or isopropyl alcohol * Coffee filters (2) * Tall glasses or plastic cups (2) * Pencil * Ruler * Tape * Table salt * Water * Measuring cups/spoons * Clean pitcher or 2-liter bottle Procedure 1. Your first task is to cut the coffee filter into a rectangle measuring three cm by nine cm. You will need 2 for this lab.
0.9 0.8 0.7 Absorbance 0.6 0.5 0.4 0.3 0.2 0.1 0 400 450 500 550 600 650 700 750 λ max 500 nm 550 nm • • Make sure you understand the directions for using the spectrophotometer and have them written in your manual. Complete the questions on the prelab page. Introduction: There are many different chemical methods that can be used to determine the concentration of a solution. You have already used one method, titration, to find the concentration of Ca+2 ions in a sample of water, and another, density, in finding the concentration of ethanol. In this lab you will use a method called visible spectroscopy to determine the concentration of a solution of CoCl2.
The different kinds of Aspirin tablets are: * Enteric Coated Tablets * Capsules * Regular Tablets * Dissolving Tablets. Each tablet will be dissolves in both Water and Hydrochloric Acid (representing saliva and stomach acid respectively). Hypothesis The Enteric Coated tablet will remain undissolved in both water and Hydrochloric Acid as the coating is designed to remain undissolved until reaching the small intestine. The dissolving tablet will dissolve the fastest in both water and Hydrochloric Acid as this tablet is designed to quickly dissolve in liquid. The capsule will soften but not completely dissolve in the water, however will dissolve in the Hydrochloric Acid.
Magic marker inks are often mixtures of several compounds. Paper chromatography is a common method of separating various components of a mixture. After separation, you can observe the different colors that make up a particular color of magic marker ink. You can also calculate a ratio Rf, which compares how far each compound traveled to how far each solvent (substance that dissolves another substance) traveled during the experiment. Rf = Ds/Df Ds = Distance traveled by the compound Df = Distance traveled by the solvent Materials: coffee filter, tape, isopropyl alcohol (rubbing alcohol), water, 3 different color magic markers (not permanent); 3 identical tall, narrow drinking glasses; metric ruler, 3 pencils Pre-lab Questions: List one extensive and one intensive property of marker ink.
The purpose of this step was to remove (extract) most of the water that has dissolved in the ether layer. 2) The aqueous layer was drained and the solution discarded in the sink. 3) The ether layer was poured out the top of the separatory funnel into a clean, dry Erlenmeyer flask. 4) Several scoops of anhydrous Mg SO4 were added and the solution swirled. The MgSo4 absorbed the last traces of water the ether solution.
Decant(ing): Decanting is a way of separating a solid from a liquid. We can carefully pour a liquid from a solid, provided the solid is quite dense and resides on the bottom of a container. The easiest way to accomplish this is to hold a glass stir rod against the lip of the container containing the solid and liquid, and gently pour the liquid down the stir rod into a new container. Extraction: Extraction is a way to separate two components with different solubilities, that is, extract one chemical from another. Extraction relies on a principle called serial dilution.