Percentage composition by mass of Magnesium oxide

Abstract:

        The purpose of this laboratory was to test the law of definite resemblances for the tax write-off reception of combusting milligram. In this lab, the polished magnesium ribbon was rigid in covered crucible and was heated in society for it to react with Oxygen presented in air and in water supply provided. The topic showed that Magnesium oxide formed through chemical reaction was made up of 60.19% magnesium and 39.81% oxygen, which is approximate equalizer of both particles in every(prenominal) Magnesium oxide compound. From this lab it can be concluded that the law of definite proportion stating that the constituents in a pure compound combine in definite proportion to each other is factual.

Introduction:

        The law of definite proportion states that every chemical compound contains definite and constant proportion (by weight) of its fraction elements. The purpose of this lab was to test for law of definite proportion through determining percentage composition of each element in Magnesium oxide. I hypothesized that the composition mass of magnesium will be more than oxygen and this would be the result for other groups as well. My null hypothesis was that if the experiment is do accurately, the percentage composition of magnesium shouldnt exceed 65%.

Material:

        -Refer to lab manual on page 180 in Nelson interpersonal chemistry 11.

        -The following revisions were made:

                 -Nickel crucible and lid was used kinda of porcelain crucible and lid

                 -Tripod was used instead of retort behave, ring stand and clamp

Procedure:

1.         The nickel crucible and lid were cleaned and dried.

2.         The observations about appearance of magnesium ribbon were made.

3.         The magnesium ribbon was polished and rolled victimization pen in order to fit it in crucible.

4.         As directed the mass of the crucible, magnesium ribbon and lid was measured. The totality mass of all tree...

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