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Answer to Question #158253 in General Chemistry for Dexther Villanueva

Question #158253

A standard CaCO3 solution is prepared by dissolving 0.4193g in enough dilute HCl to effect solution and then diluted to 500ml solution. A 25.00ml aliquot requires 23.62ml EDTA solution for titration. A 25.00ml water sample determined for total hardness, requires 8.45ml of the EDTA solution using Eirochrome Black T indicator. Calculate the total hardness in the water sample expressed in ppm CaCO3.


1
Expert's answer
2021-01-28T05:04:59-0500

X= 0.05 x 1 x 1000/25 = 2.


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