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15 Jun 2020

For the complex ion, [Fe(H2O)6]3+, the Ka = 7.7×10−3 at 298K. What is the pH of a 50 mL solution that contains 0.02 mols of Fe(NO3)2?

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Solve problems relating to precipitation
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Related questions

Calculate the pH of 0.050 M Fe(NO3)3 solution. The hydrated Fe3+ ion is [Fe(OH2)6]3+. For [Fe(OH2)6]3+, Ka = 4.0 � 10-3

The acid ionization constant for Fe(H2O)62+(aq) is 3.0×10-6. Calculate the pH of a 0.0248 M solution of Fe(NO3)2. pH =


4. Compare the magnetic properties of [Fe(H2O)6]2+ and[Fe(CN)6]4-.

5. What change in magnetic properties (if any) can be expected whenNO 2-
ligands in an octahedral complex are replaced by Cl- ligands in ad6 complex?

6. Draw the orbital splitting diagram for the following complex andgive its
electron configuration: tetrahedral CoCl42-.

7. The complex ion PdCl42- is diamagnetic. Propose a structure forPdCl42-.

8. Explain the following differences in color:

A. [Cr(H2O)6]Cl3 is violet, whereas [Cr(NH3)6]Cl3 is
yellow.

B. [Co(H2O)6]2+ is pink, whereas tetrahedral
[CoCl4]2- is blue.

C. One of the following solids is yellow, and the other is
green: Fe(NO3)2·6H2O versus K4[Fe(CN)6·3H2O].
Indicate which is which and explain your reasoning.

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