equivalent weight

In a volumetric determination of an analyte A, the data obtained and
their standard deviations are as follows:

Initial buret reading 0.23 mL 0.02 mL

Final buret reading 8.76 mL 0.03 mL

Sample weight 50.0 mg 0.2 mg



From the data, find the coefficient of variation of the final result for
the % A that is obtained by using the equation below (the equivalent
weight can be treated as having no uncertainty).

% A = tritrant volume x equivalent weight x 100/sample weight