The Yucca Mountain Repository in Nevada, Which Is Intended for the Long-Term

question 114

Multiple Choice

The Yucca Mountain repository in Nevada, which is intended for the long-term storage of nuclear waste, has long been mired in controversy. One ongoing concern is whether the stainless steel alloy containers could be corroded by salts such as calcium fluoride. If the calcium ion concentration in water inside Yucca Mountain is 1.25 *10^-3 M, what is the maximum possible concentration of fluoride ion in this water? Assume calcium fluoride K_sp = 2.2 * 10^-10 at the temperatures inside the nuclear waste depository.

• A) 1.3 *10^-3 M
• B) 2.5*10^-3 M
• C) 1.8 *10^-7 M
• D) 4.2 *10^-4 M
• E) 2.1 *10^-4 M

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Definitions:

Psychosexual Development

In Freudian theory, an unvarying sequence of stages of childhood personality development in which gratification shifts from the mouth to the anus and then to the genitals.

Latency Stage

A phase in Freudian psychosexual development occurring approximately between the ages of 5 and puberty, characterized by dormant sexual feelings.

Middle Childhood

A period in child development, typically from ages 6 to 12, characterized by the development of logical thinking, independence, and peer relationships.

Developmental Issue

Pertains to problems or delays in the physical, emotional, behavioral, or cognitive areas of growth experienced during the stages of human development.