What Is the PH of a Buffer That Results When $\times$

question 52

Multiple Choice

What is the pH of a buffer that results when 0.50 mole of H₃PO₄ is mixed with 0.75 mole of NaOH and diluted with water to 1.00 L? (The acid dissociation constants of phosphoric acid are K_a1 = 7.5 $\times$ 10^-3,K_a2 = 6.2 $\times$ 10^-8,and K_a3 = 3.6 $\times$ 10^-13)

• A) 1.82
• B) 2.12
• C) 6.91
• D) 7.21
• E) 12.44

---

Definitions:

Harry Stack Sullivan

An American psychiatrist known for his theory of interpersonal relationships and his contributions to the development of psychoanalytic and psychodynamic theories of personality.

Research

Systematic investigation to establish facts and reach new conclusions.

Friendships

Relationships between two or more individuals based on mutual affection, trust, support, and interests.

Physical Support

The act of providing assistance or reinforcement that is physical in nature, often essential for health and wellbeing.