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A 200mg sample of pure calcium carbonate was acidified and...

A 200mg sample of pure calcium carbonate was acidified and dissolved in 500mL solution. A 50mL sample required 25mL of Disodium Ethylene Diaminetetra acetate (EDTA) solution for titration. Find the molarity of the EDTA solution.

 

1. How many milligrams of CaCO3 was used in the assay?

2. What is the molarity of the EDTA solution?
 

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