5. Repeat the titration at least two additional times recording your data in the data table. Do not forget to refill the buret with KMNO4, place the voltmeter probe in the beaker, and add water each time. The molecular weight of FeClz is 126.75 g/mol. Unknown # O Data Table Trial volume KMNO4 (mL) 33 32 31.64 30.10 31,77 mass FeCl: (g) molarity KMNO4 (mol/L) Q.0815 20815 3.0018 2 1,9775 3 11946 2.0054 4 6. Write a balanced net ionic equation for the reaction in acidic solution of FeCl2 and KMNO, (Fe²* is oxidized to Fe" and MnOi is reduced to Mn*). 7. The moles of MnO, can be calculated by multiplying the volume of MnO, required to reach the endpoint multiplied by the molarity of the MnO, solution. What are the moles of MnOj used in the titration? 8. The moles of FeCl2 can be calculated by using the mole ratio from the balanced equation. How many moles of FeCl; were in the unknown? .
5. Repeat the titration at least two additional times recording your data in the data table. Do not forget to refill the buret with KMNO4, place the voltmeter probe in the beaker, and add water each time. The molecular weight of FeClz is 126.75 g/mol. Unknown # O Data Table Trial volume KMNO4 (mL) 33 32 31.64 30.10 31,77 mass FeCl: (g) molarity KMNO4 (mol/L) Q.0815 20815 3.0018 2 1,9775 3 11946 2.0054 4 6. Write a balanced net ionic equation for the reaction in acidic solution of FeCl2 and KMNO, (Fe²* is oxidized to Fe" and MnOi is reduced to Mn*). 7. The moles of MnO, can be calculated by multiplying the volume of MnO, required to reach the endpoint multiplied by the molarity of the MnO, solution. What are the moles of MnOj used in the titration? 8. The moles of FeCl2 can be calculated by using the mole ratio from the balanced equation. How many moles of FeCl; were in the unknown? .
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter23: Potentiometry
Section: Chapter Questions
Problem 23.14QAP
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