Answered: AlF3 is insoluble in liquid HF but…

AlF3 is insoluble in liquid HF but dissolves if NaF is present. When BF3 is added to the solution, AlF3 precipitates. Explain.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter21: Transition Metals And Coordination Chemistry

Section: Chapter Questions

Problem 73AE

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Concept explainers

Coordination Chemistry

It is a part of chemistry, in which the study of compounds that have central atoms surrounded by molecules or ions, known as ligand, is known as coordination chemistry.

Question

AlF3 is insoluble in liquid HF but dissolves if NaF is present. When BF3 is added to the solution, AlF3 precipitates. Explain.

Expert Solution

Step 1

Well, we have to consider the formation of complex to predict whether it will dissolve or precipitates out. We know ionic compounds dissociate completely to ions and hence they are capable of providing enough cation or anion.

Apart from this we have to know, BF₃ has more tendency to form complex with fluoride ion than aluminum so it can replace aluminum easily in the aluminum fluorine complex.

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