Question

A 1.4581 g sample of powdered milk was dissolved in 100 mL. Then, 25 mL aliquots were titrated to endpoint with an average of 13.8 mL of 0.0109 M EDTA. Calculate the %w/w of calcium in the sample.

A. 24.6 %w/w

B. 16.5%w/w

C. 0.41% w/w

D. 1.65%w/w