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SAT Chemistry

Category - Multiple Choice

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Which of the following is not true about complex ions?

Complex ions are formed with a metal as the central atom
The other molecules that bond to the metal are called ligands
Ligands act as Lewis Acids
The coordination number of a complex ion refers to the number of bonds the center atom forms
All of the above are true

Explanation

Answer: C. Ligands, the compounds that bind to the central metal atom, always act as Lewis Bases. Lewis Bases donate lone pairs of electrons to the Lewis Acid (the metal ion). All other statements are true.

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