only need answer to question 2 1) A 0.512 g sample of CaCO3 is dissolved in 12 M

Question

only need answer to question 2

1) A 0.512 g sample of CaCO3 is dissolved in 12 M HCL and the mixture is diluted to 250 mL.

2) A small amount of MgCl2 solution is added to a 25 ml aliquot of the solution in problem 1 and the mixture is titrated with EDTA to the Eriachrome Black T end point. The mixed solution requires 28.55 ml of the EDTA solution to reach the end point. A similar amount of MgCl2 solution requires 2.60 ml to reach the endpoint.
a) How many milliliters oe EDTA are needed to titrate the Ca^2+ ion in the sample?
b) How many moles of EDTA are there in the volume calculated for 2 (a)?
c) What is the molarity of the EDTA solution?

Explanation / Answer

c)What is the molarity of the EDTA solution?

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