Interpretation:
The independent and dependent variable needs to be determined and the factor that held constant in the experiment needs to be determined.
Concept introduction:
Laboratory or lab is a place that is especially equipped for experimental study in science or for testing and analysis. Various experiments are performed in the lab but with safety measures such as goggles, gloves, apron, etc.
Answer to Problem 42A
The amount of sugar is a dependent variable and temperature is an independent variable and the amount of water is constant.
Explanation of Solution
A variable is a quantity or condition that may have one or more value. There are two types of variables, independent and dependent variable. An independent variable can be changed by the performer whereas dependent variable changes in response to a change in independent variable.
Temperature is the independent variable as it is not changing with the amount of sugar that is being dissolved. Amount of sugar is a dependent variable as it is changing with the change in temperature. The more is the temperature, the more sugar can be dissolved easily. And amount of water is constant.
The independent variable is temperature, the dependent variable is sugar and water is held constant.
Chapter 1 Solutions
Chemistry: Matter and Change
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