Question
A student analyzed a CaCO3 antacid tablet by neutralizing the base with an excess of .60 M HCL and back-titrating the excess with .50M NaOH.
A student analyzed a CaCO3 antacid tablet by neutralizing the base with an excess of .60 M HCL and back-titrating the excess with .50M NaOH.
He recorded the following data:
mass of tablet = 1.3g
amount of active ingredient CaCO3 per label = 500 mg
volume of HCl added: 25 mL
initial buret reading : 34 mL
final buret reading : 47.4 mL
If the concentration of the provided HCl is actually higher than .60M, would the determined mass of CaCO3 in the antacid tablet be too high or too low?
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Biochemistry
Authors: Mary K. Campbell, Shawn O. Farrell
8th edition
9781305176621, 1285429109, 1305176626, 978-1285429106
