Part of a buret measuring in mL is shown below. Read the volume to the proper number ofsignificant digits.4546VolumemL4748492. Suppose it takes 33.69 mL of 0.005123 M EDTA to titrate 25.00 mL of a hard water solution.a) How many moles of EDTA were required to titrate to the endpoint?b) How many moles of hard water ions, expressed as moles of Ca?+, are present in the hardwater solution?c) What is the concentration, expressed as molarity of Ca2+, of hard water ions in the solution?d) If the metal ions in the hard water all came from CaCO3, how many grams of CaCO3 wouldbe in 1.000 L of the solution (in other words, determine g CaCO3/L)?e) Convert g CaCO3/L calculated in (d) to mg CaCO3/L. (This is equivalent to ppm.)

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Part of a buret measuring in mL is shown below. Read the volume to the proper number of significant digits.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter17: Complexation And Precipitation Reactions And Titrations

Section: Chapter Questions

Problem 17.33QAP

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Question

Part of a buret measuring in mL is shown below. Read the volume to the proper number of
significant digits.
45
46
Volume
mL
47
48
49
2. Suppose it takes 33.69 mL of 0.005123 M EDTA to titrate 25.00 mL of a hard water solution.
a) How many moles of EDTA were required to titrate to the endpoint?
b) How many moles of hard water ions, expressed as moles of Ca?+, are present in the hard
water solution?
c) What is the concentration, expressed as molarity of Ca2+, of hard water ions in the solution?
d) If the metal ions in the hard water all came from CaCO3, how many grams of CaCO3 would
be in 1.000 L of the solution (in other words, determine g CaCO3/L)?
e) Convert g CaCO3/L calculated in (d) to mg CaCO3/L. (This is equivalent to ppm.)

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