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Hardness ( EDTA ) mgCaC O 3 L = A N 5 0 , 0 0 0 ( m L ) s a m p
Hardness EDTA mgCaC
Where:
EDTA titrant
normality of EDTA titrant
tap water sample.
EDTA used in the titration.
a Calculate the moles of EDTA used.
b Calculate the molarity of metal ion present in the tap water sample Remember: EDTA binds to metal ions on a : molar ratio
c Find the ppm calcium ion concentration in the sample based
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