Question

An impure sample of sodium carbonate, Na2CO3, is titrated with 0.113 M HCl according to the reaction below.
2 HCl(aq) + Na2CO3(aq) CO2(g) + H2O() + 2 NaCl(aq)
What is the percent of Na2CO3 in a 0.613 g sample if the titration requires 26.14 mL of HCl? The molar mass of Na2CO3 is 106.0 g/mol.
A.0.295%
B.15.7%
C.25.5%
D.51.1%
E.67.9%

Answer

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