A Solution Is Prepared by Mixing 50

question 44

Multiple Choice

A solution is prepared by mixing 50.0 mL of 0.50 M Cu(NO₃) ₂ with 50.0 mL of 0.50 M Co(NO₃) ₂. Sodium hydroxide is added to the mixture. Which hydroxide precipitates first and what concentration of hydroxide ions present in solution will accomplish the separation? K_sp = 2.2 *10¯²⁰ for Cu(OH) ₂, K_sp = 1.3 *10¯¹⁵ for Co(OH) ₂

• A) Co(OH)₂; [OH¯] = 6.9 * 10¯⁶ M
• B) Co(OH)₂; [OH¯] = 2.6 * 10¯⁷ M
• C) Cu(OH)₂; [OH¯] = 1.8 * 10¯⁷ M
• D) Cu(OH)₂; [OH¯] = 1.1 * 10¯⁹ M
• E) Cu(OH)₂; [OH¯] = 1.0 * 10¯¹⁷ M

---

Definitions:

Educational Programs

Organized and structured content and activities designed to impart knowledge or skills to participants.

Sensorineural

Pertaining to or involving a sensory organ and its neural connections, often related to hearing loss.

Hearing Loss

The partial or total inability to hear sounds in one or both ears, which can be due to genetic causes, aging, exposure to noise, or other health conditions.

Distortion of Sound

A change in the tone or clarity of sound that results in it becoming unrecognizable or altered from its original quality.