1. If a more concentrated solution of NaOH were used, how do you think this would alter the initial conductivity value? Explain. 2. If a student mistakenly used a larger volume for the equivalence point from the graph, how would this effect the molarity of the NaOH? Explain. 3. A solution of Ca(NO3)2, 0.25 M, is mixed with 25.00 mL of a Na2CO3 solution of unknown molarity. It requires 25.00 mL of Ca(NO3)2 to reach the equivalence point when the conductance is measured vs. the volume. Write the net ionic equation for the reaction. What is the concentration of the unknown Na2CO3 solution?
1. If a more concentrated solution of NaOH were used, how do you think this would alter the initial conductivity value? Explain. 2. If a student mistakenly used a larger volume for the equivalence point from the graph, how would this effect the molarity of the NaOH? Explain. 3. A solution of Ca(NO3)2, 0.25 M, is mixed with 25.00 mL of a Na2CO3 solution of unknown molarity. It requires 25.00 mL of Ca(NO3)2 to reach the equivalence point when the conductance is measured vs. the volume. Write the net ionic equation for the reaction. What is the concentration of the unknown Na2CO3 solution?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Experiment 7
Conductometric Titration lab
Transcribed Image Text:Post-lab Questions:
1. If a more concentrated solution of NAOH were used, how do vou think this would alter
the initial conductivity value? Explain.
2. If a student mistakenly used a larger volume for the equivalence point from the graph,
how would this effect the molarity of the NaOH? Explain.
3. A solution of Ca(NO3)2, 0.25 M, is mixed with 25.00 mL of a Na2CO3 solution of unknown
molarity. It requires 25.00 mL of Ca(NO3)2 to reach the equivalence point when the
conductance is measured vs. the volume. Write the net ionic equation for the reaction.
What is the concentration of the unknown Na2CO3 solution?
4. A Na2SO4 solution is commonly used to treat flowback waters that are produced from
"fracking" (unconventional hydraulic fracturing is used to access natural gas deposits in
shale geological formations in the ground). Flowback waters are wastewaters that have
many contaminants. In this question, we are going to focus on the removal of Sr2+ from
the flowback waters. Write a net ionic equation of how Na2SO4 can remove Sr2+ from
solution. If 5.00 kg of the solid was precipitated from 30.0 L of the flowback waters,
what is the concentration of Sr2+ in the flowback waters?
40
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