Calculate the PH of a Buffer Solution Prepared by Dissolving

question 96

Multiple Choice

Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of sodium cyanate (NaCNO) and 1.0 mole of cyanic acid (HCNO) in enough water to make 1.0 liter of solution.[K_a(HCNO) = 2.0 * 10^-4]

• A)0
• B)3.0
• C)3.7
• D)4.4
• E)5.0

---

Definitions:

Sulfur

A nonmetallic chemical element with the symbol S and atomic number 16, known for its yellow crystalline appearance and importance in organic molecules.

Oxygen

A chemical element with symbol O and atomic number 8, critical for respiration in living organisms and combustion processes.

Gallium

A soft, silvery metal used in electronic circuits, and in the production of low-melting alloys.