Mass of Magnesium Strip Mass of Magnesium Strip and Weighing bottle /g (± 0.001g) | 3.585 | Mass of Weighing bottle /g (± 0.001g) | 3.460 | Mass of Magnesium Strip /g (± 0.002g) | 0.125 | Table 2 : Mass of Crucible and lid Mass of Crucible /g (± 0.001g) | 15.147 | Mass of Lid /g (± 0.001g) | 9.670 | Table 3 : Mass of Magnesium Oxide Mass of Magnesium Oxide and Crucible and Lid /g (± 0.001g) | 24.985 | Mass of Crucible and Lid /g (± 0.002g) | 24.817 | Mass of Magnesium Oxide /g
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Determining the Empirical Formula of a Compound: Burning Magnesium Lab Purpose: To experimentally determine the percent composition of a reaction product. Directions: Work in teams of three. The directions for this lab are on a separate sheet of paper at your lab bench. Make sure that everyone in your group understands the process and purpose before you get started. Assign tasks. Everyone in the group will be expected to contribute at the same level of participation‚ and for this experiment
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Magnesium (Mg) has an atomic number of 12 and an atomic mass of 24. It has 12 protons‚ 12 neutrons (varies with isotopes)‚ and 12 electrons (if it has no charge). Magnesium has a boiling point of 1363 K (1091 C/1944 F) and a melting point of 923 K (650 C/1202 F). At room temperature magnesium is solid. You can buy magnesium for $0.83 per lb. Magnesium is a metal and belongs to the alkaline-earth metal family. Magnesium was named after the city of Magnesia; it was discovered by Bussy in 1828 A.D.
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Mass of Magnesium(Mg) (g) | Volume of Hydrogen (H₂) (cm³) | 1st trial | 0.040 | 39.9 | 2nd trial | 0.040 | 40.3 | 3rd trial | 0.035 | 36.5 | Quantitative data: The Magnesium was silvery-white‚ lustrous and relatively flexible before being placed in the burette. Whilst reacting with the hydrochloric acid‚ it dissolved and bubbles were visible. The hydrochloric acid slowly diffused downwards. Calculations: Volume of un-diffused hydrochloric acid = 25 cm³ Average mass of magnesium = 0.038
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The Law of Definite Proportions states that a chemical compound contains the same element in exactly the same proportions by mass regardless of the size of the sample or source of the compound. This relates to the magnesium oxide lab because we tested out this theory to see if it is true that the law of definite proportions says that a chemical compound contains the same element in exactly the same proportions by mass regardless of the size of the sample or source of the compound. In this experiment
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Chemistry NYA/701 practise questions test 1 autumn 2012 Audrey Goldner-Sauvé #1 Assuming a magnesium atom is spherical‚ calculate its volume in nm3. The diameter of a magnesium atom is 3.20 Å . The volume of a sphere is V = (4/3) r3. 1 Å = 1 x 10–10 m and 1 nm = 1 x 10–9 m and = 3.14 #2 What is the maximum amount of carbon dioxide that can be produced by the combustion of 0.450g of C2H5OH? #3 What mass of FeCl3 would contain the same total number of ions as 16.8 g
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oxidation-reduction reaction of magnesium and hydrochloric acid solution. We compared the experimental measured amount of a product and the amount predicted by the theoretical calculation of a balanced equation: Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g) PROCEDURE First we obtained a strip of pre-cut magnesium ribbon‚ cleaned it with steel wool to remove any signs of oxidation from the strip (which would alter our results)‚ and then weighed it (individual masses of the magnesium strips for each trial can
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Working out the Formula of Magnesium oxide Aims When magnesium is heated in air‚ it reacts with oxygen. During this oxidation reaction‚ magnesium oxide is produced. This increases the mass. If we know the mass of magnesium at the start‚ and the mass of magnesium oxide produced at the end‚ we can work out the mass of oxygen which has been combined with the magnesium. We can use these masses to work out the formula of magnesium oxide. Apparatus Googles
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relationship between the mass of magnesium and mass of oxygen once the magnesium has been heated and reacted with the oxygen. There will be 3 variables in this experiment. The independent variable will be the mass of magnesium ribbon as different measurements will be taken and used for each trial. The dependant variable will be the mass of Magnesium Oxide‚ this is a measured variable as the mass of oxygen can be calculated and will enable us to determine the formula for Magnesium Oxide. The controlled variable
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COMBUSTION OF MAGNESIUM OXIDE DESIGN Aim/Purpose: To calculate the number of moles and the empirical formula of magnesium oxide. Safety precautions: 1) Wear lab coat 2) Wear gogles. 3)Make sure the bunsen burner is working properly and their is no leakage. 4) Wear gloves. Hypothesis: The weight of the magnesium ribbon increases after burning‚ so this indicated that their was a change in mass. This change happened because of the magnesium ribbon inside the crucible which reacted with Oxygen
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