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This student written piece of work is one of many that can be found in our International Baccalaureate Chemistry section.
To reach molar ratios, the number of moles of magnesium and oxygen were reached and simplified into the lowest whole number ratios. The empirical formula of magnesium oxide was then decided. During data processing, the percentage uncertainties associated with masses were found so that the percentage uncertainties of the number of moles were concluded.
Limitation There were a few limitations in my laboratory. First of all, as you can see in the volume part, there is no volume difference between no book and with a book which means there was not any pressure between these.
When the temperature is -273?, the volume will be 0. However, gases do not really reach a 0 volume but the spaces between molecules approach 0. We use the unit called Kelvin (K) because absolute zero means the temperature never goes down more than -273?
in trial two, human error does not play a huge role in this lab, because all measurements were taken with a digital instrument. Therefore the errors in this lab are mainly systematic, but could also be due to an incomplete reaction occurring due to impartial combustion.
3.Number of moles of magnesium. = 0.0091 Mole (the number of moles of magnesium = mass / atomic weight . the atomic weight of magnesium is 24.3 g / mole ) 4.Number of moles of oxygen atoms that were used.
error and was as easy to use as a common measuring cylinder or a beaker. 1 × clamp stand To hold the burette while using it to withdraw 15cm3 solutions of 2M HCl. 1 × thermometer (±0.25oC) To measure the changes in temperature of the solution of HCl and Mg.
Record the mass of crucible and lid once it has cooled. Do not handle it with your hands. 4. A magnesium ribbon which was weighted 0.3g using electronic balance was cleansed thoroughly with sandpaper to remove any oxide coating. The ribbon was fitted into the bottom of the crucible.
with oxygen was used to calculate the empirical formulae and to obtain the uncertainties. The tables are arranged in a chronological order of the process of data. With the process of data will produce the empirical formulae which will be used to compare with a theoretical value.
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