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:

Sample Standard Deviation

A measure of the dispersion or spread of data points in a sample from its mean.

Hypotheses

Testable statements or predictions, often derived from a theoretical framework, that can be tested through empirical research.

Sample Mean

The average of a subset of a larger population, used to estimate the population mean.

Sample Data

Data collected or selected from a larger population, used in statistical analysis to make inferences about the population.