Hydroxyapatite, Which Is a Component of Tooth Enamel, Is Very

question 76

Short Answer

Hydroxyapatite, which is a component of tooth enamel, is very insoluble in water. For the following reaction, K_sp  2.3  10^59. What is the molar concentration of Ca₅(PO₄)₃^ when the pH of the mouth is 4.0?

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Definitions:

Insomniacs

People who suffer from insomnia, a sleep disorder that makes it difficult for them to fall asleep, stay asleep, or causes them to wake up too early and not be able to go back to sleep.

Narcolepsy

A long-term neurological disorder that affects the brain's ability to control sleep-wake cycles, leading to excessive daytime sleepiness and sudden sleep attacks.

Irrepressible Need to Sleep

An overwhelming urge to sleep that cannot be easily controlled or suppressed.

Melatonin

A hormone produced by the pineal gland in the brain, regulating sleep and wakefulness cycles.