In Demonstrations of Strong and Weak Electrolytes and Nonelectrolytes,a Lightbulb

question 29

Multiple Choice

In demonstrations of strong and weak electrolytes and nonelectrolytes,a lightbulb apparatus that shows how much a solution conducts electricity by the brightness of the light is often used.When pure water is tested,the bulb does not light.Which one of the following aqueous solutions causes the bulb to burn the brightest?

• A)formic acid,HCOOH
• B)ammonia,NH₃
• C)table sugar,C₁₂H₂₂O₁₁
• D)a calcium salt,CaCl₂
• E)methanol,CH₃OH

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Definitions:

Non-Experimental

Research methods that do not involve manipulating variables to determine effects but instead observe naturally occurring relationships.

Experimental

Pertaining to a method of research that involves the manipulation of variables to establish cause and effect relationships.

Correlational

Relating to a statistical relationship between two or more variables, where changes in one variable are associated with changes in another, without implying causation.

Confounding Results

Outcomes in research that cannot be accurately attributed to the variables under examination because of the influence of extraneous variables.