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:

Sensory Memory

The briefest memory phase that enables people to maintain sensory information impressions even after the initial stimuli are no longer present.

Working Memory

The part of short-term memory that is concerned with immediate, conscious perceptual and linguistic processing.

Implicit Memory

Refers to the type of memory that enables individuals to perform tasks without conscious awareness of these previous experiences.

Working Memory

A cognitive construct with a maximum capacity designed for the quick storage of information pending processing.