All Questions
Tagged with aqueous-solution coordination-compounds
23
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Nature of Bisphosphonates Binding onto Hydroxyapatite in the Aqueous Phase
In many studies I've read, bisphosphonates (first image) are said to bind remarkably onto bone hydroxyapatite (second image) crystals. It was reported by J. Roelofs et al., (2008) that this mechanism ...
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1
answer
151
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Do coordination complexes with stronger ligands form more stable complexes?
I read that chelate complexes generally are more stable than monodentate complexes. However, I noticed that in the case of $\ce{[Fe(CN)6]^3-}$ and $\ce{[Fe(en)3]^3+}$, this is not observed as the ...
- 173
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Equilibrium of zinc ion with ammonia
In my chemistry lab, we are testing the amphoteric properties of this metal. I understand zink can react with an acid or a base to form different compounds in solution based on pH. In one part of the ...
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4
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1
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Why is hydrated beryllium ion acidic?
The beryllium ion, $\ce{Be^{2+}}$, forms the aquo complex $\ce{[Be(H2O)4]^{2+}}$. According to LibreTexts, this complex is acidic in solution: $$\ce{[Be(H2O)4]^{2+} + H2O -> [Be(H2O)3OH]+ + H3O+}$$
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Molar conductivity of coordination compound [duplicate]
The compound is $\ce{[Cr(H2O)6]Cl3}$. Which isomer has least molar conductivity ?
Correct answer : $\ce{[Cr(H2O)4Cl2]Cl.2H2O}$
My answer : $\ce{[Cr(H2O)3Cl3].3H2O}$
Molar conductivity is directly ...
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2
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2
answers
416
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Do all metal salts in aqueous solution contain metal aquo complexes?
I know that nickel nitrate in aqueous solution contains the metal aquo complex ion $\ce{[Ni(H2O)6]^2+}$. But do all metal salts in aqueous solution contain such complex ions? If not, on what factors ...
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2
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1
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Can o-phenanthroline be used as a complexing agent for lead(II)?
I’ve been trying to find a method to perform a spectrophotometric analysis to determine lead concentration (on the ppm level). This would require some chelator capable of forming a coloured complex ...
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1
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295
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Formation of green precipitation whilst adding potassium fluoride to aqueous solution of copper(II) sulfate [closed]
Aqueous copper sulfate solution (blue) gives a green precipitation with aqueous potassium fluoride. Explain these experimental results.
I've read answers like, $\ce{H2O}$ is a weak ligand and ...
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1
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1
answer
3k
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Products of the reaction between chromium(III) chloride, zinc and sulfuric acid
The aim of my experiment was to make a Cr(II) aquacomplex in situ, and for that I have the reaction:
$$\ce{CrCl3·6H2O + Zn}$$
and I add concentrated sulfuric acid to it. I know that chromium(III) ...
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1
answer
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Why is copper(II) sulfate added drop by drop during the Biuret test?
The Biuret test is a test for proteins. The procedure is to add a strong base, such as NaOH, to dissolve the protein. After that, copper(II) sulfate is added drop by drop into this until a (violet) ...
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4
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2
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Is Fe(OH)2 soluble in alkalis?
I have just started inorganic chemistry in school and I have just learnt about metal aqua ions and how they react in water. I learnt that $\ce{[Fe(H2O)6]^2+}$ reacts in water by losing a $\ce{H+}$ ...
- 95
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1
answer
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How can I get create complex metal ion solution such that the majority of the central metal ions only have one specific ligand?
I'm looking for a way to have the ligand, Chloride ion, datively bond with Copper Sulphate.
I understand it is as simple as creating a solution of Hydrochloric Acid and dissolving Copper Sulphate ...
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3
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1
answer
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Why are different colors, according to sugar concentration observed in Benedict's test?
Colors range from green yellow orange to red. How does the sugar concentration and Cu2O concentration cause this?
I know Cu2O is red. Why is there a green or yellow color instead of just red or some ...
- 33
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votes
1
answer
999
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Formation of MnO2 vs [Mn(H2O)6]4+ in aqueous solution
I am looking for reasons why $\ce{Mn(IV)}$ wouldn't be stable as a hydrate. I know that from standard reduction potentials it exists as a ppt of $\ce{MnO2}$, but what is stopping it from being a ...
- 1,120
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Does addition of HCl favour, or disfavour, formation of tetraamminecopper(II)? [closed]
Which way does the equilibrium
$$\ce{[Cu(H2O)4]^2+(aq) + 4 NH3(aq) <=> [Cu(NH3)4]^2+ (aq) + 4 H2O (l)}$$
shift if HCl is added to the system?
When I did this experiment, I found that the ...
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