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...
Related questions
Question
I need help answering question 1.

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.

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**
Expert Solution

This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps

Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Recommended textbooks for you

Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning

Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education

Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning

Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning

Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education

Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning

Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education

Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning

Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY