Investigating The Amount Of Calcium On The Calcium Oxide Through The Processes Of Vacuum Filtration And Acid Base Titration Essay
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The purpose of this lab was to calculate the amount of calcium in Kirkland Signature’s Calcium 600mg +D3 through the processes of vacuum filtration and acid-base titration. These two methods were effective in determining the amount of calcium in the calcium supplement with an error of +/- 0.05 g; the amount of calcium stated on the label was 600 mg. The reactions that occurred during the process of vacuum filtration were:
CaCO3 (s) + 2HCl(aq) → CaCl2 (aq) +CO2 (g) + H2O(l)
CaCl2(aq) + Na2CO3(aq) → CaCO3(s) +2NaCl(aq)
The amounts of calcium calculated from the two trials of vacuum filtration were 0.554 g and 0.573 g respectively. The calculations from the trials are shown in Equation 2 and Equation 3. The results from the vacuum filtration were very close to the amount stated on the bottle. The small deviation from the original could be the result of inadequately removing all of the ground powder from the mortar and pestle. This caused the original mass of the supplement to be less than what was expected, hence the smaller final amount. There was a small difference in the procedures between the two trials of vacuum filtration. During the second trial, more care and attention was given to make sure that the entire calcium supplement was transferred from the mortar and pestle to the 250 mL Erlenmeyer flask. Because more care was given, the calculated amount of calcium increased by 0.019 g.
The other method used in this lab was an acid-base titration. The