A Solution Contains [Ba²⁺] = 5

question 33

Multiple Choice

A solution contains [Ba²⁺] = 5.0 × 10^-5 M, [Ag⁺] = 3.0 × 10^-5 M, and [Zn²⁺] = 2.0 × 10^-7 M. Sodium oxalate is slowly added so that [C₂O₄^2-] increases.
What is the concentration of the first cation to precipitate when the second cation just begins to precipitate?

• A) 1.3 × 10^-6
• B) 2.2 × 10^-6
• C) 5.0 × 10^-5
• D) 1.35 × 10^-9
• E) 1.1 × 10^-11

---

Definitions:

Annual Leave

Paid time off granted by employers to employees to be used for personal reasons throughout the year.

Commuter Marriages

Marriages in which the spouses live apart in different geographical locations due to their work commitments, leading to periodic commuting.

Resent

To feel bitterness or indignation due to a perceived wrong or injustice.

Isolated

Describes a state of being separated from others, either physically, emotionally, or both, resulting in limited social interactions.