Empirical Formula of Magnesium Oxide

583 Words2 Pages

Empirical Formula of Magnesium Oxide Date: Aim: The aim of this experiment was to determine the empirical formula of magnesium oxide. Equipment: · Balance · Crucible and lid · Bunsen burner · Magnesium ribbon (0.2g) · Steel wool · Crucible tongs · Pipe clay triangle · Tripod Procedure: 1. Obtain a clean, dry crucible and lid, then heat them for approximately 5 minutes over a Bunsen burner 2. Clean the surface of a 20 cm strip of magnesium ribbon using steel wool 3. Coil the magnesium ribbon, so that it fits into the crucible 4. Weigh crucible and lid on a balance, and record the mass 5. Place magnesium ribbon into crucible, replace the lid and weigh once more 6. Heat the crucible and its content with the lid off until the magnesium begins to glow 7. Replace the lid and heat the crucible strongly 8. Continue to heat the crucible, occasionally lifting the lid with tongs to provide oxygen for the reaction 9. When all magnesium has reacted, remove the lid and heat strongly for 5 minutes 10. Replace crucible lid and allow to cool 11. Reweigh the crucible with its contents and lid Observations: Once the magnesium was in the crucible and was being heated by the Bunsen burner, it glowed for a brief time. It then caught fire before the lid was placed on top. When it came into contact with the oxygen, the magnesium started glowing extremely bright, and intensely white. The glow became orange after some time. The magnesium ribbon then turned white. Results: Mass of crucible and lid 29.9 g Mass of crucible, lid and magnesium 30.1 g Mass of magnesium 0.2 g Mass of crucible, lid and magnesium oxide 30.3 g Mass of magnesium oxide 0.4 g Mass of oxygen combined with magnesium 0.2 g Questions: 1. a) The mass of magnesium which reacted was 0.2 grams. b) The mass of oxygen that combined with the magnesium was 0.2 g. 2. What is the empirical formula of magnesium oxide? Mg0.2 g0.224.310.0080.0081=2 O0.2 g0.2160.01250.0081.56 =3 Thus the empirical formula of Magnesium Oxide is Mg O . 3. Why are the crucible and lid heated at the beginning of the experiment before being weighed? The crucible and lid are heated at the beginning of the experiment before being weighed so that any moisture in the crucible is burned away. Moisture is heavy, and thus it can change the results of the experiment, as we only want the weight of magnesium and the magnesium oxide. 4. What are the possible sources of error in this experiment? Possible sources of error in this experiment include the inaccuracy of measurements, as correct measurements are vital for the experiment. The loss of magnesium oxide smoke can also be counted as a possible source of error: if you should lose some of the smoke, there would be a less amount of magnesium oxide than expected at the end of the experiment.

Show More
Related

  • Formula Of A Hydrate Lab Report

    372 Words  | 1 Pages

    Get together a clay triangle, ringstand, and a burner. Wash a crucible. Locate the crucible onto the ringstand. Warm the crucible on the scorching section of the flame from the burner for approximately five minutes. Chill the crucible at room temperature. Then, weigh it precisely. Grasp the crucible using tong because the use of hands will add oils and residues on to crucible. Place roughly 2 grams of copper sulfate inside the crucible. Then, measure the weight of the crucible along with its contents. Position the crucible onto the clay triangle. Next, heat up the crucible steadily at the beginning to avoid splattering. Once heated to the shade of red, place on the hot part of the bunsen burner flame for precisely five minutes, chill to room temperature, and find the mass of the crucible including its contents. Document the weight on the data sheet. Put the crucible on the ringstand. Pour a small about of distilled water into the crucible. Wait about five minutes to see reaction that is made. Find the mass of the crucible. Indicate the mass on data sheet.

    Read More

  • Does The Temperature Of Hydrochloric Acid Affect The Rate Of The

    1028 Words  | 3 Pages

    the acid was at 14 C the magnesium took 141 seconds to react and 27 C

    Read More

  • Comparison of the Densities of Coke and Diet Coke

    684 Words  | 2 Pages

    In this experiment, there were several objectives. First, this lab was designed to determine the difference, if any, between the densities of Coke and Diet Coke. It was designed to evaluate the accuracy and precision of several lab equipment measurements. This lab was also designed to be an introduction to the LabQuest Data and the Logger Pro data analysis database. Random, systematic, and gross errors are errors made during experiments that can have significant effects to the results. Random errors do not really have a specific cause, but still causes a few of the measurements to either be a little high or a little low. Systematic errors occur when there are limitations or mistakes on lab equipment or lab procedures. These kinds of errors cause measurements to be either be always high or always low. The last kind of error is gross errors. Gross errors occur when machines or equipment fail completely. However, gross errors usually occur due to a personal mistake. For this experiment, the number of significant figures is very important and depends on the equipment being used. When using the volumetric pipette and burette, the measurements are rounded to the hundredth place while in a graduated cylinder, it is rounded to the tenth place.

    Read More

  • Jesus our…“SIN BEARER!”

    1358 Words  | 3 Pages

    John pointing to Jesus say’s, “Behold, the Lamb of God who takes away the sins of the world!” “I don’t know Him, but I have seen the Holy Spirit descend upon Him and remain, and I testify He is the Son of God!”

    Read More

  • Percent Composition by Mass of Oxygen in Potassium Chlorate

    359 Words  | 1 Pages

    7.The covered crucible was placed over the flame of the Bunsen Burner using a ring stand.

    Read More

  • Understanding the Human Nervous System: Roles and Functions

    8071 Words  | 17 Pages

    ash was boiled for 5 minute with 25ml distilled water by covering the crucible with a watch-glass on water bath then cooled. The watch-glass was rinsed with 5 ml of distilled water and this liquid was added in to the crucible. The % of remaining content was deducted from initial % of ash taken (i.e. 100%) to determine the water soluble ash value.

    Read More

  • Evolving Democracy: A Critique of U.S. Voting System

    1565 Words  | 4 Pages

    As described in CPG Grey’s video The Problems with First Past the Post Voting Explained (2011), the current system the US uses is a combination of First Past the Post (FPTP) and a Majority vote. That means the candidate who receives the most votes of all the running candidates wins, but because of the majority rule,

    Read More

  • The High Price of Adoption

    1236 Words  | 3 Pages

    Parents have the tendency to overlook how lucky they are to have had the ability to create their own children. Many do not recognize what a true blessing it is to have kids, and that others are not fortunate enough to experience that miracle. Ten percent of couples endure infertility (Advantages) so they must consider other options. A very popular choice is adoption. It is not only a good alternative for the couple, but also for the child who needs a loving home.

    Read More

  • Determining the Empirical Formula of Magnesium Oxide

    717 Words  | 2 Pages

    with a tong to see if the magnesium had started to burn and also to

    Read More

  • Lab Report Identifying Unknown Substances By Characteristic Properties

    348 Words  | 1 Pages

    7.) After you have heated them to the right temperatures, pour the excess water into a dry evaporating dish. ( Be sure not to get any of the substance in your solution. )

    Read More

  • Gravimetric Stoichiometry: Examining the Law of Conservation of Mass

    1721 Words  | 4 Pages

    The Gravimetric Stoichiometry lab was a two-week lab in which we tested one of the fundamental laws of chemistry; the Law of Conservation of Mass. The law states that in chemical reactions, when you start with a set amount of reactant, the product should theoretically have the same mass. This can be hard sometimes because in certain reactions, gases are released and it’s hard to measure the mass of a gas. Some common gases released in chemical reactions include hydrogen, carbon dioxide, oxygen and water vapor.

    Read More

  • AMMONIUM NITRATE

    560 Words  | 2 Pages

    In a 100ml beaker place 50mls of water, measure the temperature of the water and record this initial temperature onto a table. Set the timer and add one teaspoon of Ammonium Nitrate to the water, stir this continuously until the Ammonium Nitrate has dissolved.

    Read More

  • The Harcourt Essen Experiment

    1470 Words  | 3 Pages

    There is also the potential of human error within this experiment for example finding the meniscus is important to get an accurate amount using the graduated pipettes and burettes. There is a possibility that at one point in the experiment a chemical was measured inaccurately affecting the results. To resolve this, the experiment should have been repeated three times.

    Read More

  • Gel Electrophoresis Lab Report

    1232 Words  | 3 Pages

    2. In the large beaker, put water and boil it completely. After that, remove the beaker from heat. 3. Sample tubes (A-D) should be labeled and capped tightly.

    Read More

  • Rate Of Reaction Between Magnesium And Hydrochloric Acid

    1605 Words  | 4 Pages

    3 cm of magnesium ribbon generally has a mass of 0.04 g and yields 40 cm3 of hydrogen when reacted with excess acid. 50 cm3 of 1M hydrochloric in this experiment is in excess.

    Read More

More about Empirical Formula of Magnesium Oxide

Open Document