What Is the [H₃O⁺] in a Buffer That Consists of 0.30

question 58

Multiple Choice

What is the [H₃O⁺] in a buffer that consists of 0.30 M HCOOH and 0.20 M HCOONa? [K_a(HCOOH) = 1.7 × 10^-4]

• A) 1.1 × 10^{-4 M}
• B) 2.6 × 10^{-4 M}
• C) 4.3 × 10^{-4 M}
• D) 6.7 × 10^{-5 M}
• E) 1.7 × 10^{-4 M}

---

Definitions:

Endometriosis

A painful disorder in which tissue similar to the lining inside the uterus grows outside of it.

Ovarian Cancer

A malignant tumor in the ovary, marked by symptoms that may include abdominal bloating, pain, and changes in menstrual patterns.

HPV Vaccines

Vaccines designed to prevent infection by the human papillomavirus, which can lead to cervical and other types of cancers.

Gynecological Cancers

Cancers that originate in the female reproductive system, including cervical, ovarian, uterine, vaginal, and vulvar cancers.