A 2.02.0 mL aliquot of 0.001 M NaSCNNaSCN is diluted to 30.030.0 mL with 0.2 M Fe(NO3)3Fe(NO3)3 and 0.1 M HNO3.HNO3. How many moles of SCN−SCN− are present? If all the SCN−SCN− is complexed with Fe3+Fe3+ to form FeSCN2+,FeSCN2+, what is the molar concentration of FeSCN2+?

A 2.02.0 mL aliquot of 0.001 M NaSCNNaSCN is diluted to 30.030.0 mL with 0.2 M Fe(NO3)3Fe(NO3)3 and 0.1 M HNO3.HNO3. How many moles of SCN−SCN− are present? If all the SCN−SCN− is complexed with Fe3+Fe3+ to form FeSCN2+,FeSCN2+, what is the molar concentration of FeSCN2+?

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter16: Applications Of Neutralization Titrations

Section: Chapter Questions

Problem 16.20QAP

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Concept explainers

Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.

Question

A 2.02.0 mL aliquot of 0.001 M NaSCNNaSCN is diluted to 30.030.0 mL with 0.2 M Fe(NO3)3Fe(NO3)3 and 0.1 M HNO3.HNO3. How many moles of SCN−SCN− are present?

If all the SCN−SCN− is complexed with Fe3+Fe3+ to form FeSCN2+,FeSCN2+, what is the molar concentration of FeSCN2+?

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