Consider how each of the situations described below would affect the experimenta
ID: 560129 • Letter: C
Question
Consider how each of the situations described below would affect the experimental value determined for mass of calcium carbonate in the antacid tablet. Explain why the experimental mass would be too large, too small, or unaffected because of the situation described. a. An air bubble is in the tip of the buret at the beginning of the titration to standardize the 2. sodium hydroxide The student did not weigh the tablet before and after it is crushed and just assumed the entire tablet was added to the HC b.Explanation / Answer
The presence of air bubble at the tip of the burette will decrease the measured volume of burette from its exact value. So it will decrease the concentration or normality of NaOH during standardization.
To get the exact weight of the calcium carbonate present in the tablet, you need to weigh the tablet before and after crushing. Then only you will get the complete composition of tablet, whether it contain only calcium carbonate or anything else. How much amount HCl neutralized the CaCO3 present in tablet. The concentration of HCl depends on the concentration of the solution of CaCO3 containing antacid. Otherwise the exact concentration of the antacid tablet in terms of normality will not obtain.
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