When Metal a Is Placed in a Solution of Metal

question 40

Multiple Choice

When metal A is placed in a solution of metal ions B²⁺, a reaction occurs between A and B²⁺, and metal ions A²⁺ appear in the solution. When metal B is placed in acid solution, gas bubbles form on its surface. When metal A is placed in a solution of metal ions C²⁺, no reaction occurs. Which of the following reactions would not occur spontaneously?

• A) C(s) + 2H⁺(aq)  H₂(g) + C²⁺(aq)
• B) C(s) + A²⁺(aq)  A(s) + C²⁺(aq)
• C) B(s) + C²⁺(aq)  C(s) + B²⁺(aq)
• D) A(s) + 2H⁺(aq)  H₂(g) + A²⁺(aq)
• E) B(s) + 2H⁺(aq)  H₂(g) + B²⁺(aq)

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Definitions:

Membrane Potential

The voltage difference across a cell's plasma membrane, crucial for the conduction of electrical impulses in nerve, muscle cells, and for cellular homeostasis.

Ion Concentrations

The measure of the amount of specific ions in a solution, crucial for processes such as nerve impulse transmission and muscle contraction.

Electrical Charge

A fundamental property of matter that causes it to experience a force when placed in an electromagnetic field, typically described as positive or negative.

Cholesterol

A waxy type of lipid that is essential for the formation of cell membranes, certain hormones, and is involved in other biological functions, but high levels may lead to heart disease.