After conducting experiments I acquired empirical formula, molecular weight, molecular formula, density and boiling point temperature in order for me to find what the substance is. To extinguish the flame water should not be used. Cleaned o ur work ar ea, befor e measur ing the ma ss of the r oom temp ered cruc ible, l id and remaining magnesium. These percentages are the same if you take 1000 or one billion of couples MgO in any amount of this substance. This will undo… Magnesium is the twelfth element on the periodic table. In the third trial, after. Scrub the magnesium strips with steel wool to clean out impurities.
For the last trial, the empirical formula was MgO but that was after the simplification of the original empirical formula, Mg2O2, and the percent composition for magnesium was 60. This added weight is Oxygen, forming the combustion of Magnesium Oxide. The independent variable will be the mass of magnesium ribbon as different measurements will be taken and used for each trial. Heat the crucible for approximately 5 minutes. In the second example, the product is slightly magnesium-rich; the ratio of Mg-to-O is greater than the 1-to-1 expected.
For example, you might heat a known mass of magnesium in a crucible and determine the mass of oxide formed. The law of conservation of mass. In this lab, magnesium metal an element is oxidized by oxygen gas to magnesium oxide a compound. To calculate the empirical formula of magnesium oxide, the purpose of our experiment, we weighed the magnesium metal prior to the burning and the resulting magnesium oxide at the end of the burning period. Heat for 5 minutes to burn off any contaminants that may be present.
This was determined by burning the Magnesium until a white smoke started to protrude. This was then measured again and turned out to be slightly heavier than the measurement before. This experiment was significant in understanding how heat can be absorbed or released and how using a calorimeter can help measure heat flow. The empirical formula of a compound gives the lowest whole-number ratio of the constituent atoms that is consistent with the mass ratios measured by experiment. From we see that the atomic masses are 24. To work out the empirical formula, the value of moles of the different atoms in a compound is needed. Magnesium ribbon was placed in crucible and weighed using a electronic scale 3.
Do not touch the crucible, lid, triangle, ring, or stand during or after they have been heated. Do not breathe the fumes generated. This video is of an experiment which gives data you can use to calculate the percent composition of MgO. Measur ed the ma ss of t he cruci ble and t he lid- after cleani ng and dry ing it. 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.
Seawater is a rich source of magnesium in the form of salt. The controlled variable… 1206 Words 5 Pages In this experiment, we burned magnesium metal to produce magnesium oxide. This was then measured again and turned out to be slightly heavier than the measurement before. This method works well to convert the magnesium to magnesium oxide, but once again, while the lid is off the crucible some of the fine-powdery magnesium oxide tends be lost. Discussion of Theory The purpose of this lab was to find the percent composition and empirical formula of magnesium oxide. Introduction Synthesis and the determination of empirical formulas are two extremely important parts of chemistry.
This will undo the reaction so… Empirical Formula Abstract: In this lab our main objective is to find the empirical formula of MgO, magnesium oxide. Experiment to Determining the Empirical Formula of Magnesium Oxide In this experiment we will be using a piece of apparatus known as a crucible. The empirical formula of a compound is the simplest method of expressing a chemical formula in whole-number ratios of the…. The formula for Magnesium… Abstract: In this lab our main objective is to find the empirical formula of MgO, magnesium oxide. The ratio of atoms is the same as the ratio of moles.
This should ensure that no soot attaches to the bottom of the crucible. Here is a video that illustrates how to determine an empirical formula. A blinding white flame will burn as the reaction occurs. This is done to prevent contaminants from the air, especially water, from entering the crucible while it is cooling. Never place anything hot on a balance.
Materials:Magnesium stripCrucibleCrucible coverClay triangleIron ringRetort standTongsBalanceBunsen… 1444 Words 6 Pages law of definite proportions for the synthesis reaction of combusting magnesium. Obtai ned and got out equ ipment ready before o btaini ng the m agnesi um ribb on 2. Measure and record the lengths of the magnesium. The empirical formula for magnesium oxide is MgO. Usually requires both the moles of magnesium and the moles of oxygen to be divided by whichever is the lowest number. However, they are ceramic and can break.