Law Of Constant Composition Lab: Magnesium And Oxygen

1445 words - 6 pages

Purpose: To determine the percent magnesium by mass in magnesium oxide and to observe if the percentage composition is constant by comparing class results.Hypothesis/Prediction: The percent composition by mass of magnesium in magnesium oxide will not change significantly with each group that conducted the experiment. The composition of each substance should stay the same and any differences must be due to some error.Materials:Magnesium stripCrucibleCrucible coverClay triangleIron ringRetort standTongsBalanceBunsen burnerProcedure:1.obtained a strip of magnesium between 30-40 cm long2.coiled magnesium strip into a tight roll3.measured the mass of the crucible and cover4.Added the magnesium strip to the crucible and measured the magnesium, crucible and cover together.5.Partially covered the crucible with the cover and heated it using a Bunsen burner until the magnesium ignited.6.Turned off Bunsen burner.7.waited for combustion to proceed8.when the reaction appeared completed, heated the crucible again for another five minutes9.allowed crucible to cool for ten minutes10.measured the mass of the crucible, cover and magnesium oxideObservations:When ignited, the magnesium strip gave off a bright light.There was a colour change on the magnesium.It started out as silver and turned into a white colour.The combustion gave off a distinct odour.The end result was a white powder but some magnesium had been left in its original shape.Individual Group ResultsTrial No.Mass of Crucible and CoverMass of Crucible, cover and MgMass of Crucible, Cover and MgO133.8834.7735.12233.8834.7735.12333.9134.8035.15Class ResultsTrial No.Mass of Crucible and CoverMass of Crucible, cover and MgMass of Crucible, Cover and MgO436.6137.3934.83533.9134.6634.92633.5734.3434.28733.7934.5235.12832.8034.6134.83935.6136.3936.631032.8033.5734.37Analysis and Interpretation:Calculations1.Calculate the mass of the magnesium used.Mass = Mass of Crucible, cover and Mg – Mass of Crucible and CoverTrial No. 1 Mass = 34.77 – 33.88= 0.89Trial No. 2 Mass = 34.77 – 33.88= 0.89Trial No. 3 Mass = 34.80 – 33.91= 0.89Trial No. 4 Mass = 37.39 – 36.61= 0.78Trial No. 5 Mass = 34.66 – 33.91= 0.75Trial No. 6 Mass = 34.34 – 33.57= 0.77Trial No. 7 Mass = 34.52 – 33.79= 0.73Trial No. 8 Mass = 34.61 – 32.80= 1.81Trial No. 9 Mass = 36.39 – 35.61= 0.78Trial No. 10 Mass = 33.57 – 32.80= 0.772.Calculate the mass of the magnesium oxide.Mass = Mass of Crucible, cover and MgO – mass of Crucible and CoverTrial No. 1 Mass = 35.12 – 33.88= 1.24Trial No. 2 Mass = 35.12 – 33.88= 1.24Trial No. 3 Mass = 35.15 – 33.91= 1.24Trial No. 4 Mass = 34.83 – 36.61= -1.78Trial No. 5 Mass = 34.92 – 33.91= 1.01Trial No. 6 Mass = 34.28 – 33.57= 0.71Trial No. 7 Mass = 35.12 – 33.79= 1.33Trial No. 8 Mass = 34.83 – 32.80= 2.03Trial No. 9 Mass = 36.63 – 35.61= 1.02Trial No. 10 Mass = 34.37 – 32.80= 1.573.calculate the percentage by...

Find Another Essay On Law of Constant Composition Lab: Magnesium and Oxygen

Literature Review: Prediction of Henry’s Law Constant

3676 words - 15 pages particular solute-solvent pair. A common mistake is to use the vapour-phase fugacity instead of the liquid-phase one, and simply to take the HLC as the ratio of the vapour-phase fugacity to liquid phase composition. This is incorrect as it assumes that the activity coefficients are equal to one, and the HLC is the reference fugacity (Carroll, 1991). The most common form of Henry’s Law used assumes that the vapour is at a pressure low enough such that it

Lab Report Using a Chemical Titration to Measure Rate of Conversion of Hydrogen Peroxide to Water and Oxygen

2711 words - 11 pages Lab Report Using a Chemical Titration to Measure Rate of Conversion of Hydrogen Peroxide to Water and Oxygen Overview: In this laboratory you will use a chemical titration to measure and then calculate the rate of conversion of hydrogen peroxide (HO) to water and oxygen using the enzyme catalase. Objectives: Before doing this exercise, you should understand: Ø the general functions and activities of enzymes Ø the relationship between

This is a physics lab report on finding the spring constant (k). It includes many tables and charts of data.

984 words - 4 pages Lab: Finding the Spring Constant (k)I.Question/PurposeWhat is Hooke's Law, and what does it have to do with k?Objectives: Determine the spring constant of a spring, Calculate the elastic potential energy, Calculate gravitational potential energy, Determine whether mechanical energy is conserved in an oscillating spring.II.Materials ListMeterstick, Set of masses, and Support stand and clampIII.HypothesisIn order to estimate the spring constant (k

Adaptations of the Placenta and Foetus to Improve Oxygen Availability

1278 words - 5 pages form of oxygen, glucose and other substances whilst excreting waste products such as carbon dioxide. The placenta and foetus feature many adaptations to ensure the most efficient gas exchange and to ensure high oxygen availability to the foetus . Gas exchange across the placental blood-blood barrier is dependent on many factors such as interhaemal barrier thickness, the surface area of exchange and the concentration gradient of the gases, among

The Kathmandu Valley and the Constant Terror of Earthquakes

1349 words - 5 pages The Kathmandu Valley and the Constant Terror of Earthquakes One important climatic feature that plagues the South Asian region of the Kathmandu Valley is earthquakes. A few severe earthquakes have taken place in the country's history and caused many deaths and nearly irreparable damage to impoverished Nepal. The residents of the Kathmandu Valley experience small tremors nearly every day, whether they can feel

The structure and composition of the atmosphere

528 words - 2 pages are the prime components and are only present at extremely low densities.The air we breathe is actually a combination of several gases. Within the first 80 km or so in altitude, the composition is quite constant. This portion is known as the homosphere. Higher in elevation, the concentrations of each gas vary considerably. The gases found within the 80 km are: 78% Nitrogen (N2), 21% Oxygen (O2) and the other 1% is divided within three other gases, argon (A), water (H2O) and Carbon Dioxide (CO2).

The Determinants and Consequences of Friendship Composition

595 words - 3 pages The purpose of this study is to examine the friendship composition among high school teenagers and analyze the demographic patterns of the friendship links. Furthermore, the authors estimate if friendship composition have an effect on educational outcomes. The authors intend to close some gaps in the teenage friendship literature by focusing on the effects of the peer composition rather than the cohort quality of the teenager. They use survey

COMPOSITION AND THE PRINCIPLES OF DESIGN

938 words - 4 pages COMPOSITION AND THE PRINCIPLES OF DESIGN You will apply principles of design and visual organisation to your designs using a combination of balance, scale, unity and proportion, rhythm, symmetry and positive and negative space. By utilising the elements of line, tone, texture, shape, and emphasis, you will achieve visual harmony in your composition and layout. As you develop a working knowledge of the properties of colour, you will apply

The Transformation of Music: Radio and Composition

1440 words - 6 pages in economic prosperity. Subsequently, radio’s emergence altered the way music was heard and, meanwhile, the composition of music was modified to reflect society’s general mood. The invention and widespread use of radios allowed citizens to experience music differently than they had before. Previously, one would have to venture outside the home to listen to music. One might travel to concerts, or into town to listen to a jukebox, or they

Experiment to investigate factors affecting the rate of reaction between magnesium ribbon and hydrochloric acid

2245 words - 9 pages hydrochloric acid. The apparatus and chemicals used for my experiment will be as follows:- · 2 large beakers. · 5 conical flasks · a large measuring cylinder (that holds up to 25cm3 of liquid) · supply of 2M concentration hydrochloric acid · roll of magnesium ribbon · supply of distilled water · stop-clock · ruler Safety Throughout all experiments I will be cautious when handling chemicals and wear the following safety items at all times:- · lab

Investigating the effect of varying concentration on the reaction between magnesium ribbon and hydrochloric acid

1903 words - 8 pages beginning, the volume of acid, the surface area of the magnesium strip, the length of the magnesium strip and if the magnesium strip is cleaned or not. The magnesium strips were cleaned and cut correctly by the lab technician and I measured and inspected the strip each time I started the experiment to make sure it was ok for the experiment. Most of these variables for this experiment (except the surface area of the magnesium strip, if it is cleaned

Similar Essays

Percentage Composition By Mass Of Magnesium Oxide

1494 words - 6 pages Abstract:The purpose of this lab was to test the law of definite proportions for the synthesis reaction of combusting magnesium. In this lab, the polished magnesium ribbon was placed in covered crucible and was heated in order for it to react with Oxygen presented in air and in water provided. The result showed that Magnesium oxide formed through chemical reaction was made up of 60.19% magnesium and 39.81% oxygen, which is approximate proportion

Explanations Of The Major Elements: Oxygen, Carbon, Hydrogen, Nitrogen, Calcium, Phosphorus, Magnesium, Potassium, Sulfur, Sodium, Chlorine, Iron And Zinc.

1424 words - 6 pages Oxygen (O)Human beings obtain this element from the air. It enters a person's bloodstream through the lungs. The blood carries oxygen to the cells of the body. In the cells, oxygen combines with chemicals obtained from food. Energy produced during this process makes it possible for each cell to perform its function in the body. Also, oxygen atoms are present in water and water is essential to all life. It is present in many organic compounds

This Is Lab Report About The Synthesis And Determination Of Empirical Formula For Magnesium Oxide.

517 words - 2 pages for magnesium oxide, our calculated empirical formula Mg1.37±0.1O1.00±0.1 suggests an imbalance ratio with less than one oxygen atom for every magnesium atom. This confidence about the proportion of Mg instead of O is due to the certainty of the mass of Mg (a 15 cm magnesium ribbon), and uncertainties of the mass of O whose value may change because of some sources of error during the reaction with Mg (with and without adding water

Colorimetric Determination For The Composition And Equilibrium Constant For The Formation Of A Metal Complex Ion

1571 words - 6 pages Colorimetric Determination for the Composition and Equilibrium Constant For the Formation of a Metal Complex Ion Abstract The object of this experiment was to determine properties for the formation of a metal complex ion, ferrothiocyanate by observing its colorimetric characteristics. The reaction was done for differing amounts of Fe+3 and SCN-, and the absorbance was measured using a spectrophotometer. The absorbance showed that