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1. In part one if you allow your titration to go affect will that have on your calculated mo than/lower than/the same as the actual mol mc

1. In part one if you allow your titration to go affect will that have on your calculated mo than/lower than/the same as the actual mol mc

Chemistry
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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**Question 1: Understanding Titration Endpoint** In part one, if you allow your titration to go beyond a faint pink endpoint and it ends up dark pink, what effect will that have on your calculated molarity of NaOH? Would you calculate a molarity that is higher than/lower than the same as the actual molarity? Explain your reasoning. --- **Explanation:** This question explores the impact of surpassing the intended endpoint during a titration process on the determination of a solution's molarity. In particular, it refers to a situation where sodium hydroxide (NaOH) is used, and the endpoint is determined by a color change.
Transcribed Image Text:**Question 1: Understanding Titration Endpoint** In part one, if you allow your titration to go beyond a faint pink endpoint and it ends up dark pink, what effect will that have on your calculated molarity of NaOH? Would you calculate a molarity that is higher than/lower than the same as the actual molarity? Explain your reasoning. --- **Explanation:** This question explores the impact of surpassing the intended endpoint during a titration process on the determination of a solution's molarity. In particular, it refers to a situation where sodium hydroxide (NaOH) is used, and the endpoint is determined by a color change.
**Introduction to Titrations** **Objective:** In this simple titration, you will learn the procedure and calculations involved in titrations. You will react a solution of NaOH with a standard acid KHP. You will then use the calculated (standardized) concentration of NaOH to calculate the concentration of an HCl solution. **Concepts:** - Titrations --- **Introduction to Titrations Data Sheet** **Data Table: Titration** **Part 1:** - Use the molar mass of KHP to calculate moles of KHP reacted. - Use stoichiometry to determine moles of NaOH reacted. - Divide moles NaOH by volume used to get molarity (mol/L). - Average the molarity for all trials. | Data | Trial 1 | Trial 2 | Trial 3 | Trial 4 | Trial 5 | |------------------------|----------|----------|----------|----------|----------| | Mass of KHP | 0.49 | 0.37 | 0.45 | 0.31 | 0.44 | | Initial Burette Reading| 0.88 | 0.92 | 16.25 | 19.72 | 1.15 | | Final Burette Reading | 21.25 | 16.25 | 34.38 | 35.7 | 19.72 | | Net Volume NaOH | 20.37 | 15.33 | 18.13 | 15.98 | 18.57 | | Moles KHP Used | 0.0024 | 0.0018 | 0.0022 | 0.0015 | 0.0022 | | Moles NaOH Used | 0.0024 | 0.0018 | 0.0022 | 0.0015 | 0.0022 | | Molarity NaOH | 0.1178 | 0.1171 | 0.1217 | 0.0938 | 0.1185 | **Average Molarity of NaOH = 0.1137 mol/L**
Transcribed Image Text:**Introduction to Titrations** **Objective:** In this simple titration, you will learn the procedure and calculations involved in titrations. You will react a solution of NaOH with a standard acid KHP. You will then use the calculated (standardized) concentration of NaOH to calculate the concentration of an HCl solution. **Concepts:** - Titrations --- **Introduction to Titrations Data Sheet** **Data Table: Titration** **Part 1:** - Use the molar mass of KHP to calculate moles of KHP reacted. - Use stoichiometry to determine moles of NaOH reacted. - Divide moles NaOH by volume used to get molarity (mol/L). - Average the molarity for all trials. | Data | Trial 1 | Trial 2 | Trial 3 | Trial 4 | Trial 5 | |------------------------|----------|----------|----------|----------|----------| | Mass of KHP | 0.49 | 0.37 | 0.45 | 0.31 | 0.44 | | Initial Burette Reading| 0.88 | 0.92 | 16.25 | 19.72 | 1.15 | | Final Burette Reading | 21.25 | 16.25 | 34.38 | 35.7 | 19.72 | | Net Volume NaOH | 20.37 | 15.33 | 18.13 | 15.98 | 18.57 | | Moles KHP Used | 0.0024 | 0.0018 | 0.0022 | 0.0015 | 0.0022 | | Moles NaOH Used | 0.0024 | 0.0018 | 0.0022 | 0.0015 | 0.0022 | | Molarity NaOH | 0.1178 | 0.1171 | 0.1217 | 0.0938 | 0.1185 | **Average Molarity of NaOH = 0.1137 mol/L**
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