A Solution Contains the Ions Ag⁺, Pb²⁺, and Ni²⁺

question 8

Multiple Choice

A solution contains the ions Ag⁺, Pb²⁺, and Ni²⁺. Dilute solutions of NaCl, Na₂SO₄, and Na₂S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order?

• A) Na₂S, NaCl, Na₂SO₄
• B) Na₂SO₄, NaCl, Na₂S
• C) Na₂SO₄, Na₂S, NaCl
• D) NaCl, Na₂S, Na₂SO₄
• E) NaCl, Na₂SO₄, Na₂S

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Definitions:

Diels-Alder Reaction

A chemical reaction between a conjugated diene and a substituted alkene (dienophile) to form a cyclohexene derivative, often used in the synthesis of complex natural products.

Cyclization

A chemical reaction that transforms a linear molecule into a cyclic one by forming a ring structure.

Thermal Conditions

Refers to the temperature and heat-related circumstances affecting or controlling a process or reaction.

Symmetry-Allowed

In quantum chemistry, a process or transition is symmetry-allowed if it does not violate symmetry rules governing molecular transformations.