What Is the Hydronium Ion Concentration in a Solution Prepared

question 26

Multiple Choice

What is the hydronium ion concentration in a solution prepared by mixing 150.0 mL of 0.10 M HCN with 150.0 mL of 0.050 M NaCN? Assume that the volumes of the solutions are additive and that K_a = 4.9 × 10^-10 for HCN.

• A) 2.4 × 10^-10 M
• B) 4.9 × 10^-10 M
• C) 9.8 × 10^-10 M
• D) 7.0 × 10^-6 M

---

Definitions:

Big Five Personality

A theory describing five broad dimensions of human personality traits: openness, conscientiousness, extraversion, agreeableness, and neuroticism.

Extraversion

A personality dimension referring to an individual's level of sociability, energy, and tendency to seek stimulation in the company of others.

Conscientiousness

A personality trait characterized by organization, dependability, and a strong sense of duty.

Private Employment Agencies

Businesses that help individuals find jobs and assist employers in filling job vacancies.