Problem 135 - Chemistry An Atoms First Approach

Question

"Lithium" is often prescribed as a mood-stabilizing drug. Do you think the "lithium" prescribed is in the elemental form? What is the more likely form of lithium to be prescribed as a drug?

Step-by-Step Solution

Answer

The "lithium" prescribed as a mood-stabilizing drug is not in its elemental form, due to its reactivity. Instead, it is more likely to be prescribed in the form of lithium salts, such as lithium carbonate (Li2CO3) or lithium citrate (Li3C6H5O7), as they are more stable, soluble, and bioavailable for therapeutic use.

Step 1: Understand the properties of elemental lithium

Elemental lithium is a soft, silvery-white alkali metal. It is highly reactive and does not occur freely in nature. Due to its reactivity, it is typically not found in its elemental form in biological systems.

Step 2: Consider the properties of lithium compounds

Lithium can form various compounds, such as lithium salts, which are more stable and less reactive than elemental lithium. These compounds can be soluble in water and more easily absorbed by the body.

Step 3: Identify the likely form of lithium prescribed as a drug

The more likely form of lithium to be prescribed as a drug is lithium salts, such as lithium carbonate (Li2CO3) or lithium citrate (Li3C6H5O7). These compounds are more stable, soluble, and bioavailable than elemental lithium, making them suitable for therapeutic use. In conclusion, the "lithium" prescribed as a mood-stabilizing drug is not in its elemental form, but rather in the form of lithium salts like lithium carbonate or lithium citrate.