What Is the Approximate Concentration of Free Ni²⁺ Remaining at Equilibrium

question 87

Multiple Choice

What is the approximate concentration of free Ni²⁺ remaining at equilibrium in a solution prepared by mixing 5.0 mL of 0.10 M NiCl₂ with 5.0 mL of 2.00 M ethylenediamine? [The net formation constant for the tris(ethylenediaminenickel(II) ion is 2.1 × 10¹⁸.]

• A) 0.050 M
• B) 1.4 × 10^-19 M
• C) 4.8 × 10^-19 M
• D) 3.9 × 10^-20 M
• E) 2.8 × 10^-20 M

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Definitions:

Manchuria

A historical region in Northeast Asia, rich in resources and strategically important, often contested and occupied by various powers such as China, Russia, and Japan throughout history.

Diplomatic Isolation

A foreign policy strategy where a country or government is purposely excluded from international diplomacy and activities.

Aggressor States

Nations that initiate hostilities or war against other countries without provocation.

Appeasement Policy

A diplomatic strategy of making concessions to an aggressive power in order to avoid conflict, most notoriously associated with British policy toward Nazi Germany in the 1930s.