• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Determining Chemical Formulas

Extracts from this document...


Determining a Chemical Formula Abstract: The purpose of this laboratory is to create a bond between two or more substances to determine the empirical formula of the substance. The bond that is trying to be created in this lab is magnesium oxide. By heating the magnesium and introducing water, will create magnesium oxide which massing the final product and comparing it to the original will produce the values for the empirical formula. Procedure: The procedure was taken from experiment 5 in General Chemistry by Grace R. ...read more.


6. Heat gently and then strongly with lid slightly displaced for 5 minutes 7. Cool crucible and then weigh. 8. Record your data and calculations Data: The following data table, table 2, was created after the weights were obtained. Weight of the crucible 19.83g Weight of the crucible & Magnesium 20.12g Weight of the Magnesium 0.29g Moles of magnesium 0.011929 0.29g Mg x (1 mol Mg / 24.31g Mg) = 0.011929 moles Weight of the crucible & Magnesium oxide 20.31g Weight of oxygen 0.19g Moles of oxygen 0.011875 0.19g O x (1 mol O /16g O) ...read more.


Analysis: The masses obtained from both the magnesium and the magnesium oxide were reasonable. As evident from Table D, the magnesium had 1.0045 moles which when compared to 1 mole of oxygen, was way less than a 1% error. This resulting indicates that the empirical formula for magnesium oxide is: 2Mg + O2 => 2MgO The ionic bond between one magnesium and one oxygen atom formed magnesium oxide. The compound that was created was a white powder. Conclusion: The formation of a compound was successful. A mol to mol ratio of 1 to 1 was recovered. The empirical formula that was determined in the lab was the correct empirical formula for the creation of magnesium oxide. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our University Degree Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related University Degree Chemistry essays

  1. Experiment 5 - Determining Molecule Weight by Freezing Point Depression Method

    First, identify the freezing point depression of the solvent. Next, calculate the molal concentration of the solution as it can be obtained by dividing the moles of solute with the mass of solvent in kilograms. Moles of solute can be obtained by dividing the mass of solute used in the experiment by molar mass of the solute.

  2. A 0.60 um film of silicon dioxide is to be etched with a buffered ...

    Therefore, the final dimensions of the window, as measured at oxide-substrate interface, after ideal isotropic etching using a wet etchant is complete is represented in the following diagram: c). I have completed this question with the assumption that the average slope of the window edge can be determined by drawing

  1. We are determining the concentration of halides (%Cl). There are many methods to ...

    of the crucible), then transferred quantitatively separately the three unknowns that have been settling for 1 week, filtering everything in the beakers and washing 3 to 4 times with 0.02 M HNO3. The suction was then disconnected and removed each crucible after filtration.

  2. Optimizing a Windows-Based Computer Data Acquisition and Reduction System for the General Chemistry Laboratory

    and they were given a brief expository, "About the Myers-Briggs Type Indicator" (see Appendix E) that we wrote to describe the test. Only 52 (38%) filled out the Myers-Briggs Inventory. Most students felt that this was totally voluntary as they were asked to complete it outside of class.

  1. Determination Of The Valency Of Magnesium

    In this experiment, the starting weight of magnesium is already known, so hydrogen gas collected can be measured to calculate the stoichiometry reaction, including the valency and the proportional molecule. The purpose of this experiment is to find out the quantitative relations between amounts of reactants and products between magnesium

  2. Forensic Chemistry - Ion Selective Electrode. The objective of experiment is to determine ...

    Table 4 gives values for the “S” factor in the Nernst equation for the nitrate ion. The operating range of the nitrate ion electrode is 0 °C - 40 °C, provided that temperature equilibrium has occurred. If the temperature varies substantially from room temperature, equilibrium times up to one hour are recommended Temperature (oC)

  1. The aims of this experiment are to measure the heat of decomposition of hydrogen ...

    Results and Calculation Assignment 1: Heat Capacity of Calorimeter Temperature of cold tap water, T1 = 25.5oC Temperature of warm water, T2 = 41oC Temperature of cold and warm tap water after mixing: Time Temperature(oC) 15s 32 30s 32.5 45s 32.5 1m 33.0 1m15s 33.0 1m30s 32.5 1m45s 32.5

  2. Steam Distillation of (S)-(+)-Carvone from Caraway Seeds and (R)-(- )-Carvone from Spearmint Leaves. Analysis ...

    Therefore, the frequency for carbonyl group in carvone is about 1675cm-1. Since (S)-(+)-Carvone and (R)-(-)-Carvone are enantiomers, IR spectra for both enantiomers of carvone are identical. The Rf value of a compound is a physical constant for a given set of chromatographic conditions.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work