A 500-ML Sample of 2

question 39

Multiple Choice

A 50.0-mL sample of 2.0  10^-4 M CuNO₃ is added to 50.0 mL of 4.0 M NaCN. Cu⁺ reacts with CN^- to form the complex ion Cu(CN) ₃^2-: What is the concentration of CN^- at equilibrium?

• A) 6.0  10^-4 M
• B) 1.0 M
• C) 4.0 M
• D) 2.0 M
• E) none of these

---

Definitions:

"You" Attitude

A communication style that focuses on the needs, interests, or concerns of the audience rather than the speaker.

Credibility

The quality of being trusted and believed in, often achieved through expertise, reliability, and a sense of integrity.

Believability

The quality of being able to be believed or trusted.

Specific Praise

Positive feedback that is detailed and focused on particular aspects of someone's performance or work.