The Total Hardness of a water sample can be determined volumetrically using ethylenediamine tetraacetate (EDTA), which...

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The Total Hardness of a water sample can be determined volumetrically using ethylenediamine tetraacetate (EDTA), which forms a 1:1 complex with Ca²+ and other divalent metal cations. Calculate the Total Hardness and express as ppm CaCO3, if a 50.00+ 0.05 mL water sample required 3.22 ± 0.03 mL of a (1.330 ± 0.005) x 10³ M EDTA titrant to reach a Calmagite end-point. Estimate the uncertainty in your answer by propagation of the reported errors, given that only one analytical determination was made. The Total Hardness of a water sample can be determined volumetrically using ethylenediamine tetraacetate (EDTA), which forms a 1:1 complex with Ca²+ and other divalent metal cations. Calculate the Total Hardness and express as ppm CaCO3, if a 50.00+ 0.05 mL water sample required 3.22 ± 0.03 mL of a (1.330 ± 0.005) x 10³ M EDTA titrant to reach a Calmagite end-point. Estimate the uncertainty in your answer by propagation of the reported errors, given that only one analytical determination was made.

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