Calcium in powdered milk is determined by ashing a XXXXXXXXXXg sample and then titrating thecalcium...

Question

Calcium in powdered milk is determined by ashing a XXXXXXXXXXg sample and then titrating thecalcium with EDTA solution, 12.13 mL being required. The EDTA was standardized bytitrating 10.00 mL of a zinc solution prepared by dissolving XXXXXXXXXXg zinc metal in acid anddilution to 1L in a volumetric flask (i.e XXXXXXXXXXL). For the standardization titration, 10.82mL of EDTA was required. What is the weight % Ca in the powdered milk sample?Notes on procedure:1. Ashing burns off the organic matter in a sample, leaving just the mineral residue,which can then be dissolved for analysis.2. The stoichiometry of the complexation reactions between EDTA and calcium andEDTA and zinc is 1:1 in both cases.

Robert · Accepted Answer

Given:
A powdered milk solution of Calcium is estimated using titration with EDTA solution. 
Amount of EDTA used for estimating calcium = 12.13 ml
Concentration of zinc solution used for estimating EDTA
= given number of grams of Zn/molar mass 
  Volume of solution in litres
= 0.5941/65.39 
       1
= 0.00908 M
Volume of zinc solution used for estimating zinc = 10 ml
EDTA consumed while titrating with zinc solution = 10.82 ml
Note given: The stoichiometry of the complexation reactions between EDTA and calcium 
andEDTA and zinc is 1:1 in both cases.

Calcium in powdered milk is determined by ashing a XXXXXXXXXXg sample and then titrating thecalcium with EDTA solution, 12.13 mL being required. The EDTA was standardized bytitrating 10.00 mL of a...

Solution

Answer To This Question Is Available To Download

Related Questions & Answers

Submit New Assignment