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1. Remember that all solutions used in this experiment contain 0.50 M HNO;. What happens to the HNO3 concentration if two 10.0-mL solutions of 0.50 M HNO; are combined together? In preparing solution number 1 (see experimental procedure), a student measures 5.0 mL of 2.00 x 10* M Fe(NO3)3, 2.0 mL of 2.00 x 10* M HSCN, and 3.0 mL of 0.50 M HNO3. (The solvent for the Fe(NO3)3 and HSCN solutions is 0.50 M HNO;). After combining these, what are the concentrations of Fe", HSCN, and H* in the resulting solution? Show all work. 2. 3. If, at equilibrium, the solution prepared in Problem #1 has an absorbance of 0.36, what is the Fe(SCN)** concentration, assuming that the absorptivity of Fe(SCN)?* is 5150 L mol' cm' for 447-nm light? 4. Use the information and your answer from Problem #2, construct an equilibrium table (ICE table) and determine the equilibrium concentrations of Fe", HSCN, and H*. Then determine the equilibrium constant for the system.

1. Remember that all solutions used in this experiment contain 0.50 M HNO;. What happens to the HNO3 concentration if two 10.0-mL solutions of 0.50 M HNO; are combined together? In preparing solution number 1 (see experimental procedure), a student measures 5.0 mL of 2.00 x 10* M Fe(NO3)3, 2.0 mL of 2.00 x 10* M HSCN, and 3.0 mL of 0.50 M HNO3. (The solvent for the Fe(NO3)3 and HSCN solutions is 0.50 M HNO;). After combining these, what are the concentrations of Fe", HSCN, and H* in the resulting solution? Show all work. 2. 3. If, at equilibrium, the solution prepared in Problem #1 has an absorbance of 0.36, what is the Fe(SCN)** concentration, assuming that the absorptivity of Fe(SCN)?* is 5150 L mol' cm' for 447-nm light? 4. Use the information and your answer from Problem #2, construct an equilibrium table (ICE table) and determine the equilibrium concentrations of Fe", HSCN, and H*. Then determine the equilibrium constant for the system.

Introductory Chemistry: A Foundation
Introductory Chemistry: A Foundation
9th Edition
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter7: Reactions In Aqueous Solutions
Section: Chapter Questions
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1. Remember that all solutions used in this experiment contain 0.50 M HNO;. What happens to the HNO3 concentration if two 10.0-mL solutions of 0.50 M HNO; are combined together? In preparing solution number 1 (see experimental procedure), a student measures 5.0 mL of 2.00 x 10* M Fe(NO3)3, 2.0 mL of 2.00 x 10* M HSCN, and 3.0 mL of 0.50 M HNO3. (The solvent for the Fe(NO3)3 and HSCN solutions is 0.50 M HNO;). After combining these, what are the concentrations of Fe", HSCN, and H* in the resulting solution? Show all work. 2. 3. If, at equilibrium, the solution prepared in Problem #1 has an absorbance of 0.36, what is the Fe(SCN)** concentration, assuming that the absorptivity of Fe(SCN)?* is 5150 L mol' cm' for 447-nm light? 4. Use the information and your answer from Problem #2, construct an equilibrium table (ICE table) and determine the equilibrium concentrations of Fe", HSCN, and H*. Then determine the equilibrium constant for the system.
Transcribed Image Text:1. Remember that all solutions used in this experiment contain 0.50 M HNO;. What happens to the HNO3 concentration if two 10.0-mL solutions of 0.50 M HNO; are combined together? In preparing solution number 1 (see experimental procedure), a student measures 5.0 mL of 2.00 x 10* M Fe(NO3)3, 2.0 mL of 2.00 x 10* M HSCN, and 3.0 mL of 0.50 M HNO3. (The solvent for the Fe(NO3)3 and HSCN solutions is 0.50 M HNO;). After combining these, what are the concentrations of Fe", HSCN, and H* in the resulting solution? Show all work. 2. 3. If, at equilibrium, the solution prepared in Problem #1 has an absorbance of 0.36, what is the Fe(SCN)** concentration, assuming that the absorptivity of Fe(SCN)?* is 5150 L mol' cm' for 447-nm light? 4. Use the information and your answer from Problem #2, construct an equilibrium table (ICE table) and determine the equilibrium concentrations of Fe", HSCN, and H*. Then determine the equilibrium constant for the system.
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