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Werner's Coordination Theory

The complex s...

Question

The complex studied by Werner had a composition corresponding to the formula $P t {C l}_{4} .2 K C l$ . From electrical conductance measurements, he determined that each formula unit contained three ions. He also found that silver nitrate did not give a precipitate of $A g C l$ with this complex. Write a formula for this complex that agrees with this information.

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Solution

Since $A g C l$ precipitate is not formed with this complex, this implies that $C l^{-}$ ions are not free and are inside the coordination sphere.
Also, it contains $3$ ions. Therefore, the possible formula of this complex is $K_{2} [P t C l_{6}]$ .

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