In a Demonstration of Strong Electrolytes, Weak Electrolytes, and Nonelectrolytes

question 24

Multiple Choice

In a demonstration of strong electrolytes, weak electrolytes, and nonelectrolytes, Professor Popsnorkle used a lightbulb apparatus that showed how much a solution conducted electricity by the brightness of the lightbulb. When pure water was tested, the bulb did not light. When some acetic acid was added to the water, the bulb burned dimly. When more acetic acid was added to the solution, the bulb burned a little more brightly. In his frustration to make the bulb shine brightly with acetic acid, Professor Popsnorkle started over by testing the beaker of the pure acetic acid. What was the result?

• A)The bulb did not light.
• B)The bulb burned dimly.
• C)The bulb burned more than any of the others but still not brightly.
• D)The bulb burned brightly.
• E)Professor Popsnorkle was electrocuted.

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Definitions:

Simple Regression

An analytical approach that employs a linear equation to depict how a dependent variable is influenced by one independent variable.

Stepwise Regression

A method of regression analysis in which the selection of predictive variables is carried out by an automatic procedure, adding or removing predictors based on specific criteria.

Independent Variables

Variables in an experiment that are manipulated or changed to observe their effect on dependent variables.

Regression Model

A mathematical model that estimates the relationship between a dependent variable and one or more independent variables.