Pdf the magnesium oxide lab ahmed alhosani academia. Thus, the final product of the synthesis will be pure magnesium oxide. Magnesium oxide may also be used for purposes not listed in this medication guide. As heat is evolved by the reaction inside the calorimeter, the temperature of the contents increases, and it is this temperature change that is measured and related to the enthalpy of the. Since mass is conserved, the amount of oxygen that is added to.
Background in this laboratory, we will introduce one of the most often used techniques in thermochemistry, calorimetry. Magnesium is an element your body needs to function normally. Magnesium oxide reacts violently or ignites with interhalogens such as chlorine trifluoride clf3 or bromine pentafluoride brf5, and incandescently with phosphorus pentachloride pcl5. The purpose of this experiment is to determine the empirical formula of a compound. Magnesium metal is heated during welding or smelting process, metal fume fever may result from inhalation of magnesium fumes. Using the masses of magnesium and magnesium oxide, determine the mass of oxygen o not o 2 in your compound. First, we need to know the molar masses of the elements and the compound. Chemical formula of magnesium oxide carroll college. Lab 2 determination of the empirical formula of magnesium oxide goal and overview the quantitative stoichiometric relationships governing mass and amount will be studied using the combustion reaction of magnesium metal. In these cases, the solid material will be the limiting reagent. If ribbon like material remains in the crucible, replace the burner and continue heating.
The object of this experiment is to determine the experimental empirical formula of a compound, magnesium oxide, and comparing it to its. While waiting, determine the mass of a sample of magnesium ribbon about 0. Lab stoichiometry of magnesium oxide goggles must be worn at all times introduction. Pdf magnesium oxide is one of the most important magnesium compounds used in the industry. In this experiment, you are using this technique to experimentally determine the empirical formula of magnesium oxide. Pdf determining the empirical formula of magnesium oxide. It can be shown that there has been an increase in mass. Interestingly, the crucible in this experiment contains magnesium oxide, and the powdery substance that forms in it is pure magnesium oxide. Roll up long sleeves, especially if they are loose and baggy. In this experiment, you will determine the percent yield when solid magnesium metal and oxygen gas o2 react to form solid magnesium oxide mgo.
In the early work of gregg and packer 1955, a maximum specific area of about 200 m 2 g. Magnesium oxide is a mineral supplement used to treat or prevent low levels of magnesium in the blood. This section should include all relevant data generated during your experiment. The results can be used to find the formula of magnesium oxide and two methods are described for doing so. Pdf the hydration of different active mgo under an unforced and ultrasonic. Determining the empirical formula of an oxide prelab name. Magnesium oxide lab report free download as word doc. Lab 2 determination of the empirical formula of magnesium oxide. When you think that you have completed the lab call mr. Magnesium oxide side effects, dosage, interactions drugs. When heated, magnesium reacts readily with oxygen in the air, to produce magnesium oxide. Your lab notebook should include the masses of 1 the empty crucible, 2 the crucible with magnesium, and 3 the crucible with magnesium oxide for each of the two trials.
Magnesium oxide is also used as an antacid to treat indigestion, or as a laxative to relieve occasional constipation. Nov 29, 2012 in this video, i work out most of the post lab questions from the empirical formula lab. Magnesium reacts vigorously when heated in the presence of air. It should be labeled to indicate what it is, and proper units should. Calculate the number of moles of magnesium and moles oxygen o not o 2. Explain how the experiment will allow you to determine the correct formula for magnesium oxide. Magnesium oxide is used as a supplement to maintain adequate magnesium in the body. Mass of crucible, cover, and product after final heating calculations. The mgo 2 reaction is energetic enough to allow some mg to react with gaseous n 2. Magnesium can react with both nitrogen and oxygen gases.
I think the mass of the magnesium in this experiment will increase, decrease, or remain the same. Some people use it as an antacid to relieve heartburn, sour stomach, or acid indigestion. Before coming to the lab, read the experiment and look at the measurements and calculations you will be making and list the data you will need to record on page 2. Experiment 7 f10 1 experiment 7 empirical formula of magnesium oxide chem 110 lab i.
Note that 1 is the main reaction and 2 is a side reaction. Empirical formula of magnesium oxide red hook central schools. Determination of the empirical formula of magnesium oxide. Introduction the object of this experiment is to determine the experimental empirical formula of a compound, magnesium oxide, and comparing it to its theoretical empirical formula, mgo. The magnesium oxychloride cement is formed by mixing a magnesium chloride mgcl 2 brine solution with a magnesium oxide mgo composition in a selected stoichiometric ratio of mgcl 2, mgo, and h 2 o. Magnesium is weighed and then heated in a crucible. For this investigative phenomenon, you will need to determine the percent yield of magnesium oxide from the given reaction to determine if it is a useful commercial process. Percent yield lab report izzy isabella ramirez july 2019 mr. In this experiment, you will measure the enthalpy changes of several. Forms such as citrate and chloride may be better absorbed. Empirical formula of magnesium oxide postlab youtube. The objective of this lab is to experimentally determine the empirical formula of magnesium oxide.
So how do we determine the chemical formula for this reaction lets work through the prelab problems. Magnesium oxide lab answer sheet oak park independent. Magnesium oxide 400800 mg daily magox 400 or 140280 mg 3 times daily uromag. Synthesis of magnesium oxide and determination of its. Magnesium combines with water to form magnesium hydroxide which reacts chemically to neutralize or buffer existing quantities of stomach acid.
The amount of magnesium oxide produced will be much greater than the amount of magnesium nitride. Since mass is conserved, the amount of oxygen that is added to the magnesium upon bonding can be calculated. The percent composition and empirical formula of magnesium oxide can then be calculated, based on the combining ratios of magnesium and oxygen in the reaction. A calorimeter is a reaction vessel that is well insulated in order to prevent heat transfer between the reaction and its surroundings. The magnesium should be wholly converted to a light gray powder, magnesium oxide. Although we often think of calorimetry in terms of finding the number of calories in a.
Reaction of magnesium metal and hydrochloric acid 1. Prelab problem the reaction of iron with air produces iron oxide. Magnesium chloride is also less likely to cause diarrhea and is recommended if you are taking a higher dose. Kracht over to check your product before you completely remove the crucible from the triangle. Empirical formula of magnesium oxide procedure p1 determination of the empirical formula of magnesium oxide procedure i. Saftdatatm ratings provided here for your convenience. Magnesium oxide is the oxide salt of magnesium with antacid, laxative and vascular smooth muscle relaxant activities. The practical activity takes around 3045 minutes, depending on the competence of the class. In this experiment, you will synthesize magnesium oxide via the reaction pathways summarized in figure 1. This can be calculated knowing the mass of each element and using this to calculate the number of moles of each.
Flinn lab chemicals, your safer source for science. Determining the empirical formula of magnesium oxide. It is used in the metals refining industry, in electrical insulating material, and as a supplement in animal feed. Magnesium oxide when magnesium and oxygen are heated together, they readily undergo a chemical change reaction. Magnesium oxide also may be used as a laxative for shortterm, rapid emptying of the bowel before surgery, for example. In this video, i work out most of the post lab questions from the empirical formula lab. Magnesium oxide created by global safety management, inc. The chemical formula of magnesium oxide chemistry libretexts. Wait for a few minutes to allow the setup to reach thermal equilibrium. Reason for citation magnesium oxide is on the hazardous substance list. Attach sample calculations of each type necessary to obtain the results in the above table. Magnesium oxide lab report oxygen magnesium avaliacao. Identify the oxidation state of each element and determine whether each.
Enthalpy of formation of magnesium oxide adapted with permission from the united states air force academy. Unknown axxxx 1012 in your unknown packet need at least 23 grams safety concerns. The equation used to calculate the enthalpy is a simplified version of eq. Magnesium is reacted with oxygen from the air in a crucible, and the masses before and after the oxidation are measured.
In this experiment, you will heat magnesium in air. When magnesium is heated in the presence of oxygen in air, magnesium reacts with oxygen to produce magnesium oxide 1. For todays experiment you will determine what data to record and you will organize it into. When finely divided magnesium oxide is dispersed in air it is called magnesium oxide fume. In this experiment, you will examine the reaction between magnesium metal and oxygen gas. Pdf mechanism of magnesium oxide hydration based on the. The production of mgo is often done from calcined magnesium.
The nitrogen in air may also react with magnesium to form magnesium nitride 2, but oxygen is much more reactive so there is a greater amount of the oxide. We will weigh the magnesium before it combines with the. Empirical determination of the composition of a substance. Magnesium oxide of high surface area can be produced by the thermal decomposition of various magnesium compounds.
Hrxn values for reactions 2 and 3 of the magnesium oxidation sequence, weighed amounts of solid magnesium and solid magnesium oxide will be added to excess hcl. Safety data sheet according to 29cfr19101200 and ghs rev. The results can be used to find the formula of magnesium oxide and two methods are described for doing so lesson organisation. Adding water to this mixture of products and heating will convert the magnesium nitride to magnesium oxide. Your lab notebook should include the masses of 1 the empty crucible, 2 the crucible with magnesium, and 3 the crucible with magnesium oxide for. Magnesium is important for many systems in the body, but it is especially vital for healthy. Since magnesium is an active metal, it will react with both molecular oxygen and nitrogen in the air. Magnesium oxide is an overthecounter mineral effective as treatment for constipation, indigestion, magnesium deficiency, high blood pressure during pregnancy preeclampsia and eclampsia, irregular heartbeat, asthma, pain caused by nerve damage associated with cancer, cerebral palsy, chronic fatigue syndrome, chronic obstructive pulmonary disease, cluster headache, colon and rectal. Write balanced equations, with phases, for the following. In this lab, magnesium metal an element is oxidized by oxygen gas to magnesium oxide a compound. Stoichiometry of magnesium oxide lab whitney high school.
The cement is a mixture of magnesium oxide and magnesium chloride typically with a weight ratio of 2. In todays lab, you will experimentally determine the empirical formula of a compound known as magnesium oxide. The change in mass when magnesium burns resource rsc. Record your data and calculations in the lab report below. Intro the empirical formula of a substance is the simplest whole number ratio of the number of atoms of each element in the compound. The formula that describes the smallest whole number ratio for elements in a compound is the empirical formula. Determination of the empirical formula of magnesium oxide in this lab, you will experimentally determine the empirical formula of magnesium oxide, starting with magnesium metal and oxygen in the air. Risk assessmentmoderate to high due to corrosive liquids 1. Pdf magnesium salts as compounds of the preparation of. Capitals indicate lifethreatening, underlines indicate most frequent. Magnesium oxide chemistry report free essay example. Magnesium oxide mg o, or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium see also oxide.
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