The mass of the crucible and its lid were recorded. 2. The surface of the magnesium ribbon was scraped with emery paper to remove any magnesium oxide on the surface. 3. The magnesium was coiled and placed in the crucible.
2. Clean the magnesium ribbon with sandpaper. 3. Coil the ribbon and place it in the crucible. Weigh the crucible with its lid and the content in it.
- Make sure the Compounds are no where close to your other sensory organs, remember that only your eyes are protected by the Goggles. -If a compound is spilled, wipe it up immediately and tell the instructor. Materials : powder forms of these compounds - LiNO3 - NaNO3 - KNO3 - Ca(NO3)2 - Ba(NO3)2 - - Unknown compound A - Unknown compound B - Goggles, Bunsen burner, distilled water, Q-tips, paper towel and a striker. Procedures 1- Turn on the Bunsen burner around the 45 degree angle. 2- Feel the gas on the top of the Bunsen burner with your hands, adjust if too high or too low.
* Dispose of any solid residue as directed by your instructor. Procedure Measure the mass of the crucible with its lid on the electric balance. Record your data. Loosely fold the Magnesium ribbon and put in the crucible. Measure their mass on the electric balance.
About 3mL of the wash water is collected in a small test tube. A few drops of 0.1M silver nitrate solution is added to the water to test for the presences of Cl- ions. Lastly the filter paper was placed in the dry oven to dry completely and then weighted. Calculations and observations were made and recorded. Observations The
Part 1 of The Redox Arena Objective: In this experiment, we had to conduct research on zinc, iodide, and acidified water. What my partner and I did was we mixed the aforementioned elements with acidified water to see what would happen. We took notes on the physical traits of each, and then we compared out qualitative results with the three samples we had. Materials & Observations: * electronic balance * Bunsen burner * Parafilm * Spatula * Boiling tube * Corks * large beaker * Stirring rod * large test tube * test tube rack * small graduated cylinder * pipets * grease pencil * Ziploc bag * Boiling chips- off white, small pebble like pieces * Desiccant- white small rocks, chalky * Acidified water- clear liquid * Sodium thiosulfate- clear liquid * Granular zinc- gray, small, mineral like * Iodine crystals- dark grey, shiny solid * Zinc ion- grey, irregular shaped * Solid zinc iodide- white solid * Mineral oil- colorless solution The Mass table was as followed: Chemicals | Amount | Granular Zinc | 2.01 grams | Iodine Crystals | 2.01 grams | Acidified Water | 5.0 mL | Procedure: 1. Obtain a boiling tube, a large test tube and a small test tube.
Introduction: The purpose of this experiment is to determine the empirical formula of magnesium oxide formed by the reaction of magnesium with oxygen. To work out formula by the experiment it is necessary to measure the exact masses of each element present in a sample of a compound. Knowing the masses of magnesium and oxygen and its molar masses it is possible to find how many moles of each element is present in the magnesium oxide. The number of moles then can be used to obtain a molar ratio, which gives us the empirical formula of the compound. During the combustion reaction the ribbon of magnesium metal is heated, it reacts with oxygen from the air in a crucible, producing magnesium oxide: magnesium + oxygen → magnesium oxide We measure the mass of magnesium we use for the reaction, and the mass of magnesium oxide produced at the end of it, then we can work out the mass of oxygen that has been combined with the magnesium.
The Empirical Formula of an Oxide, Purpose: The purpose of this lab was to determine the empirical formula of magnesium oxide. To do this, we measured the weight of the magnesium before the reaction with oxygen, and then measure it after it had bonded with the oxygen. After the mass of the items were collected, the data was calculated in empirical formula. Background: The empirical formula of a compound is the whole number ratio of the elements in a compound. For example, the empirical formula of water is H2O meaning for every 1 O atom there are 2 H atoms.
Materials: 250mL Beaker Test Tube Calorimeter Burner, Ring Stand, and Wire Gauze Thermometer Balance Procedure: 1. Prepare an appropriate data table. 2. Fill the 250mL beaker about half full. Place it on the stand and begin heating it to the boiling point (100 degrees Celsius).
Title: Separation of a Mixture of Solids Purpose: To learn about separating solids and how this happens. By separating the solids one will be able to tell the difference between a mixture and a pure substance. Procedure: Four main steps. Separating the iron from the mixture with a magnet. Separate the sand by boiling water and pouring the water off, then move on to separating the Benzoic acid using filter paper.