Chapter 1.2, Problem 1RQ

Interpretation Introduction

Interpretation: The difference between a qualitative observation and a quantitative observation needs to be explained.

Concept Introduction: Observations are essential in the subject chemistry. Chemists use observations to collect as well as record the data. Through observations, researchers develop and test hypotheses & theories. 

Answer to Problem 1RQ

Qualitative observation is generally conducted on a small data sample size. For example: smell, touch, etc. Quantitative observation is carried out on a large data sample size. For example: graduated cylinders, thermometers, etc.

Explanation of Solution

The difference between a qualitative observation and a quantitative observationis mentioned below:

Qualitative observation	Quantitative observation
Qualitative observations use a person’s sense to observe the result.	Quantitative observations are observed with instruments (ruler, beakers, etc.)
Qualitative observations are variable.	Quantitative observations are invariable.
Qualitative observations are not accurate.	Quantitative observations are accurate.
Qualitative observations are not measurable.	Quantitative observations are measurable.
Qualitative observations cannot be noted in expressions of numbers.	Quantitative observations can be noted in expressions of numbers.
For example: Freezing point of is more polar than its boiling point.	For example: The freezing point of is The boiling point of is