The Alkali Metals Are Isolated from Non-Aqueous Systems

question 19

Multiple Choice

The alkali metals are isolated from non-aqueous systems. Why is this necessary?

• A)The electrolysis of aqueous solutions of the alkali metals requires more energy than electrolysis of the molten salts.
• B)The dissolved alkali earth halides are too reactive to be electrolyzed.
• C)The aqueous metal ions are more difficult to reduce than water.
• D)The reduction potentials of the alkali metals are more positive than the reduction potential of water.
• E)The aqueous metal ions react violently with water.

Discuss the concept and importance of random assignment in experimental designs.

Recognize the features and implications of within-subjects vs. between-subjects experimental designs.

Identify methods to mitigate weaknesses in posttest-only and pretest-posttest control group designs.

Understand the principles and guidelines for developing reliable and valid scale items.

---

Definitions:

Cocaine

A powerful stimulant drug extracted from the leaves of the coca plant, often used recreationally and known for its potential for addiction.

Heroin

An illegal opioid drug known for its highly addictive properties and potential for abuse.

Sleeper Effects

Teratogenic outcomes or effects that are not visible until many years later.

Teratogens

Agents or factors that can cause malformation of an embryo or fetus during prenatal development.