Answer to Question #192814 in Organic Chemistry for Maria

Question #192814

A water sample was tested for water hardness. A 50.00 mL sample, prepared and buffered

to pH 10, required 23.55 mL of 0.0250 M EDTA. A second 50.00 mL aliquot, prepared with

NaOH, was titrated with 14.53 mL of the same EDTA solution.

a. Calculate the total hardness of the water sample, express in ppm CaCO3

b. Calculate the concentration of CaCO3 in the sample in ppm

c. Calculate the concentration of MgCO3 in the sample in ppm


1
Expert's answer
2021-05-13T07:21:37-0400

Calculate ppm in standard solution:



Now Calculate concentration EDTA in mg per mL EDTA:




Now calculate the mg in the water sample:



Now calculate ppm in the water sample:


ppm


We have to use experiment data as it is

There is no proof of those experimental values.


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Comments

Assignment Expert
14.05.21, 12:58

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Babushka
13.05.21, 21:08

Wonderful!

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