A Solution Was Prepared Such That the Initial Concentrations of Cu²⁺(aq)

question 93

Multiple Choice

A solution was prepared such that the initial concentrations of Cu²⁺(aq) and CN^-(aq) were 0.0120 M and 0.0400 M, respectively. These ions react according to the following chemical equation:
Cu²⁺(aq) + 4CN^-(aq)
Kc= 1.0 x 10²⁵ ⇌ Cu(CN) ₄^2-(aq)
What will be the concentration of Cu²⁺(aq) at equilibrium

• A) 0.0020 M
• B) 0.0040 M
• C) 0.0060 M
• D) 0.0080 M
• E) None of the above

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Definitions:

Elton Mayo

A pioneering researcher in industrial human relations who led the Hawthorne Studies, which highlighted the importance of social factors in the workplace such as employee morale and productivity.

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A situation where an economy or firm produces goods or services at the lowest possible cost, often achieved by fully utilizing all available resources.

Pareto Analysis

A statistical technique used in decision making that is based on the principle that 80% of effects come from 20% of causes, often used to prioritize tasks.

80/20 Rule

A principle stating that 80% of effects come from 20% of causes, often used to highlight the importance of focusing on the most productive inputs.