Warn students that it will take some time to cool down. Loss of magnesium oxide as a white smoke when lid is lifted. Recorded the mass of a dry porcelain crucible and lid via an analytical balanced. About 10 ml of distilled water was added in crushed powder and both were mixed with stirring rod. Sorry, but copying text is forbidden on this website! Conclusion By carefully applying heat and oxygen to a strip of pure magnesium, it was demonstrated that magnesium oxide was formed. The actual composition was similar, but not the same as the theoretical composition and this could have been the result of multiple instrumental or human errors.
Calculate the percentage composition of magnesium oxide using your experimental data from Part A. At this point, remove the lid and heat for another couple of minutes. Magnesium may not have reacted completely with oxygen. The changing of white powder into small-dark circles was a chemical reaction as well. How to write the empirical formula for a compound when you are given the molecular formula? By lifting the lid of the crucible regularly, it could have prevented the magnesium from reacting with nitrogen, and instead it will allow adequate supplies of oxygen from the air to react.
Magnesium oxide side effects Get emergency medical help if you have signs of an allergic reaction: ; difficult breathing; swelling of your face, lips, tongue, or throat. The relationship between the variables was the properties of an element that causes them to react. To compare the lab ratio to the percent composition calculation based on the formula. Use your data to in 1, to calculate the amount of magnesium and and the amount of oxygen in your product. The nickel crucible and lid were cleaned and dried.
Any leftover compounds in the crucible from previous experiments may have varied or contaminated the reaction. Ask your doctor how to best schedule your medications. Magnesium oxide is also used as an antacid to treat , or as a laxative to relieve occasional. Place the crucible containing the magnesium in the pipe clay triangle and put the lid on. So in theory, the number of moles calculated for magnesium should give the same number of moles of MgO. You should assume that all compounds encountered in the laboratory are toxic and handle them accordingly. What effect would this have on the percentage composition calculation? The purpose of this lab was to test for law of definite proportion through determining percentage composition of each element in Magnesium oxide.
See if there is an error in your data. The compounds you will work with do have some hazards associated with them. Repeat step 5 until all the magnesium has burnt to magnesium oxide. Transition elements contain ions that present in aqueous solution as complex ions. The rest had similar results which proves that their errors were similar as well. On other hand, since the mass of air particles like nitrogen, carbon and hydrogen is lower than oxygen, the percentage composition of magnesium will be higher in Magnesium nitride, Magnesium carbide, or Magnesium hydride than it is in Magnesium oxide.
These percentages are the same if you take 1000 or one billion of couples MgO in any amount of this substance. They should divide mass by the atomic mass for each element. As directed the mass of the crucible, magnesium ribbon and lid was measured. Students with long hair should tie it back. The law of definite proportions states that a specific compound always contains the same amount of elements in fixed proportions by mass. Percentage Composition of Magnesium Oxide Aleshia Otieno Mr.
This was necessary because we wanted magnesium to react with oxygen and therefore had to remove the white film. The observations about new compound were made. The controlled variable is that the Magnesium used is possibly from the same ribbon and after being cut into lengths was stored in the same way in plastic containers. If the lid is off for too long then the magnesium oxide product will begin to escape. Support your answer with evidence. If a compound's molecular formula cannot be reduced any more, then the empirical formula is the same as the molecular formula.
Identify one error that could significantly affect your results. A single strip of magnesium was coiled and placed at the bottom of the crucible. The magnesium ribbon was polished and rolled using pen in order to fit it in crucible. Also in this report will be an outline. Avoid taking other medicines within 2 hours before or 2 hours after you take magnesium oxide. In this investigation, one strip of magnesium was coiled and put into a ceramic crucible and cooked over a Bunsen burner with an intense flame.