Answers to Chapter 1 Lab Logics: ...................................................................................... 2

Instructor Manual: Williamson, Macroscale/Microscale Organic Experiments 2024, 9780357851159 8e;

Chapter 1: Getting Started

1 © 2024 Cengage Learning, Inc. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.Instructor Manual Williamson, Macroscale/Microscale Organic Experiments 2024, 9780357851159 8e;

Chapter 1: Getting Started

Table of Contents Purpose and Perspective of the Chapter .......................................................................... 2 Chapter Objectives ............................................................................................................. 2 Answers to Chapter 1 Lab Logics: ...................................................................................... 2 Lab Logics! ................................................................................................................................. 2 Lab Logics! ................................................................................................................................. 3

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Instructor Manual: Williamson, Macroscale/Microscale Organic Experiments 2024, 9780357851159 8e;

Chapter 1: Getting Started

2 © 2024 Cengage Learning, Inc. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.Purpose and Perspective of the Chapter As its title reveals, Chapter 1 is introducing students to the study of organic chemistry in a laboratory setting. It contains content that can be used alongside your course’s syllabus.Chapter Objectives

The sections of this chapter are:

• an introduction to the two types of experiments: technique experiments and

synthetic experiments (1A) • learning goals of the lab course (1B) • the scientific method of organic experiments (1C) • a check-in day checklist (1D) • general lab safety and citizenship (1E) • the lab notebook format (1F) • common calculations used for organic experiments (1F) • broad overview of communicating work (1G) The goal is to give the students a broad overview of the organic lab course and get them ready for their organic lab experience.

Answers to Chapter 1 Lab Logics:

Lab Logics!What is the main physical property that applies to each technique?

Answer:

• The main physical property for recrystallization is solubility.• The main physical property for distillation is boiling point.• The main physical property for extraction is solubility. 2 / 4

Instructor Manual: Williamson, Macroscale/Microscale Organic Experiments 2024, 9780357851159 8e;

Chapter 1: Getting Started

3 © 2024 Cengage Learning, Inc. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.• The main physical property for thin-layer and column chromatography is polarity.Lab Logics!When to calculate % recovery and % yield?

Answer:

% Recovery is used for technique experiments, that is, separating a mixture or purifying a crude sample and then isolating the desired compound. % Recovery is not used for reaction experiments where a new compound is made.% Yield is used for synthetic experiments, that is, when a reactant is transformed into a new compound (product). The limiting reagent is used to determine the theoretical yield of the desired product. 3 / 4

Instructor Manual: Williamson, Macroscale/Microscale Organic Experiments 2024, 9780357851159 8e;

Chapter 2: Experimentation and Lab Safety

1 © 2024 Cengage Learning, Inc. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.Instructor Manual Williamson, Macroscale/Microscale Organic Experiments 2024, 9780357851159 8e;

Chapter 2: Experimentation and Lab Safety

Table of Contents Purpose and Perspective of the Chapter .......................................................................... 2 Answers to Chapter 2 Lab Logics: ..................................................................................... 2 Lab Logics! ................................................................................................................................. 2 Lab Logics! ................................................................................................................................. 3 Lab Logics! ................................................................................................................................. 3

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