A compound with formula RuCl3?5H2O is dissolved in water, forming a solution tha

Question

A compound with formula RuCl3?5H2O is dissolved in water, forming a solution that is approximately the same color as the solid. Immediately after forming the solution, the addition of excess AgNO3(aq) forms 2 mol of solid AgCl per mole of complex.

Part A: Write the formula for the compound, showing which ligands are likely to be present in the coordination sphere.

Part B: After a solution of RuCl3?5H2O has stood for about a year, addition of AgNO3(aq) precipitates 3 mol of AgCl per mole of complex. Write the chemical formula of the new compound that is now present one year.

Thanks

Explanation / Answer

Part A : Since AgNO3 is forming 2 moles of AgCl, then it proves that there are 2 Cl- ions present outside coordination sphere. Considering the coordination number of 6 ( Most stable of Ru), the compound will be [Ru(H2O)5Cl]Cl2

Part B : Following above logic, the new compound will be [Ru(H2O)6]Cl3.


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