Data Given. no Trial 3 information needed Experiment 28Data and Calculations: Determination of the Hardness of WaterMass of beakerplus CaCO,Mass of beakerless sampleMass of CaCO3sampleNumber of moles CaCO3 in sample(Formula mass = 100.1 g/mol)Determination of blank:Initial buretreadingStandardization of EDTA SolutionTitrationInitial buret readingFinal buret readingVolume of EDTAOVolume of EDTA used totitrate blankVolume of EDTA used totitrate Ca2+Molarity of EDTA =moles Ca2+ in aliquot × 1000volume of EDTA required (mL)Mean molarity of EDTA:112.5900.10.4Final buretmL readingI10.535245ggmoles112mLmLmLmi.mLMVolume Ca*solution preparedMolarity of Ca²+Moles Ca²+ in eachaliquot titratedmLII35Volumeof blankO35mLmLmLmL250mLM51IIIM Standard deviation in molarity of EDTA:mLMmolesmLmLmLmLmLmLMM(continued on following page

The hardness of water can be determined by the titration method. In the titration, a known amount of…

Data and Calculations: Determination of the Hardness of Water 112.580 Volume Ca* solution prepared Mass of beaker plus CaCO, Mass of beaker less sample Caco 0.1 A 1 g Molarity of Ca²+ Moles Ca²+ in each 250 ml. M

Data and Calculations: Determination of the Hardness of Water 112.580 Volume Ca* solution prepared Mass of beaker plus CaCO, Mass of beaker less sample Caco 0.1 A 1 g Molarity of Ca²+ Moles Ca²+ in each 250 ml. M

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter31: Introduction To Analytical Separations

Section: Chapter Questions

Problem 31.32QAP

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.

Question

Data Given. no Trial 3 information needed

Experiment 28
Data and Calculations: Determination of the Hardness of Water
Mass of beaker
plus CaCO,
Mass of beaker
less sample
Mass of CaCO3
sample
Number of moles CaCO3 in sample
(Formula mass = 100.1 g/mol)
Determination of blank:
Initial buret
reading
Standardization of EDTA Solution
Titration
Initial buret reading
Final buret reading
Volume of EDTA
O
Volume of EDTA used to
titrate blank
Volume of EDTA used to
titrate Ca2+
Molarity of EDTA =
moles Ca2+ in aliquot × 1000
volume of EDTA required (mL)
Mean molarity of EDTA:
112.590
0.1
0.4
Final buret
mL reading
I
10.5
35
245
g
g
moles
11
2
mL
mL
mL
mi.
mL
M
Volume Ca*
solution prepared
Molarity of Ca²+
Moles Ca²+ in each
aliquot titrated
mL
II
35
Volume
of blank
O
35
mL
mL
mL
mL
250
mL
M
51
III
M Standard deviation in molarity of EDTA:
mL
M
moles
mL
mL
mL
mL
mL
mL
M
M
(continued on following page

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