Coordination compound

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Dhamnekar Winod
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Coordination compound

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Which is a Double salt?
a)K2SO4Al2(SO4)3.24H2O
b)NaCl
c)K4[Fe(CN)6]
d)KCl
Last edited by Dhamnekar Winod on Tue Apr 13, 2021 9:23 am, edited 1 time in total.
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Re: Coordination compound

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Only a. Explain why please?
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Re: Coordination compound

Post by Dhamnekar Winod »

Two molecules of sulfate anions are attached to cations of potassium and aluminum. That's why it is called double salt.
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Re: Coordination compound

Post by ChenBeier »

Yes. Also can explain in this way. If compound is dissolved in water you can find potassium, aluminium and sulfat ions.
What is difference to K4[Fe(CN)6]. What will you find.
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Re: Coordination compound

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In potassium ferrocyanide, there are five molecules of iron and potash cations and only six molecules of cyanide anion.
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Re: Coordination compound

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No that is not the item we looking for. What happens if you dissolve the pottasiumferrocyanide in comparison of the potassiumaluminiumsulfate.
Think to the headline.
Write the equation in ionic form.
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Re: Coordination compound

Post by Dhamnekar Winod »

Coordination compound means a compound in which a molecule or ion formed by the bonding of metal atom or ion to two or more ligands by coordinate covalent bonds
Coordinate covalent bond means a bond formed when one atom provides both electrons in a shared pair.

Ligand means an ion or neutral molecule attached to a central metal ion in coordination compound.

2 K4Fe(CN)6 + 2 H2O = 2 K3Fe(CN)6 + 2 KOH + H2 📖

Chemical structure of K3Fe(CN)6 (Potassium Hexacyanoferrate(Ⅲ)) In the following structure, how many coordinate covalent bonds are present?

Image
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Re: Coordination compound

Post by ChenBeier »

Sorry you have realy no idea.

KAl(SO4)2 => K+ + Al 3+ + 2 SO4 2-

We have two cathion and one type of anion. Means double salt.

K4[Fe(CN)6] => 4 K+ + [Fe(CN)6] 4-

We have only 1 type cathion and one type anion.
It is similar NaCl => Na+ + Cl- so no double salt.

Additional the complex what you have shown is K3[Fe(CN)6] is not the same what was asked in the original question.

The chemical equation is again nonsense. K4[Fe(CN)6] is very stable in water. There will be no hydrogen development.
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