The K_sp of Calcium Phosphate Is 1 × 10−³³

question 48

Multiple Choice

The K_sp of calcium phosphate is 1 × 10−³³.What is the concentration of Ca²⁺ in equilibrium with Ca₃(PO₄) ₂(s) if [PO₄³⁻] = 1 × 10−⁵ M?

• A) 1 × 10−²⁸ M
• B) 1 × 10−²³ M
• C) 1 × 10−¹¹ M
• D) 5 × 10−¹⁰ M
• E) 2 × 10−⁸ M

---

Definitions:

Pregnancy

The period during which a fetus develops inside a woman's womb or uterus, usually lasting about 40 weeks from the last menstrual period to childbirth.

Embryo Implants

The process by which a fertilized embryo attaches itself to the wall of the uterus, beginning the stages of pregnancy.

Endometrium

The inner lining of the uterus, which thickens during the menstrual cycle in preparation for possible implantation of an embryo.

PDE-5 Enzyme

An enzyme that breaks down cyclic GMP, regulating blood flow in the penis and thus playing a crucial role in erectile function.