Questions tagged [transition-metals]
For questions about the characteristic physical properties, chemical reactions, etc. of d-block elements, group 3-12, or their compounds. Do not use this tag if your questions is about general properties of metals, use [metal] instead. Also see [rare-earth-elements].
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Why is nickel anticorrosive?
I've been looking into corrosion and common ways to prevent it. Pure nickel seems to be the main anticorrosive material to use, but I can't find a decent answer as to what it has/does that other ...
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Why does berkelium have two electronic configurations?
J.D. Lee Concise Inorganic Chemistry, Appendix E: Electronic Structures of the Elements [1, p. 601] provides two electronic configurations for berkelium:
$$
\ce{Bk}\quad
\begin{cases}
[\ce{Rn}]~\...
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How many multivalent elements are there?
According to this video there are 20 multivalent elements, and from the periodic table, I see 20, but according to multiple websites, including this, it says there are only 5. What am I not ...
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Store Palladium Chloride in Solution
I have one gram of palladium chloride ($\ce{PdCl2}$) and I want to use very small quantities of it, in milligrams somewhere. It is not possible for me to get my hands on a scale that can measure that ...
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How do we know the ionic charge of iron or elements such as iron on the periodic table?
How do we find iron's ionic charge? I was taught that we use roman numerals but I don't see any on the basic periodic table of elements (I'm using this one). So how do we find iron's charge of Fe 2+ ...
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Why do elements turn into ions [duplicate]
i am studying the d block and fblock of the modern periodic table. But i don't understand why transition metals have variable oxidation states.
I ve been told that they will form ions only for joining ...
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How long does it take for zinc oxide powder and heinz vinegar to fully react into zinc acetate at a 1:2 ratio of zinc:heinz vinegar? [closed]
How long should I leave a solution of zinc oxide powder and heinz vinegar in order for it to react as completely as possible? The solution is 1(zinc oxide powder):2(heinz vinegar) in a glass flask. ...
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Can you oxidize gold using only oxygen?
I keep reading that gold does not react with oxygen, but I also see information about gold Oxides (ie: aurous oxide, Au2O and auric oxide, Au2O3)
Knowing that there is a way of getting gold oxide ...
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Why is AgOH brown when silver(I) ions are colorless?
As Wikipedia states, $\ce{Ag+}$ ions are colorless in solution: https://en.wikipedia.org/wiki/Color_of_chemicals
Compounds that I know of containing $\ce{OH-}$ are also colorless or white (such as $\...
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Is hydrochloric acid or sulfuric acid more corrosive to titanium?
Which acid is more corrosive to titanium at 20 to 30 °C and similar concentrations: hydrochloric acid $\ce{HCl}$ or sulfuric acid $\ce{H2SO4}$?
I found some info on AZoMaterials — Titanium - Corrosion ...
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Does chromium(III) oxide react with or dissolve in liquid sulfur dioxide?
Liquid $\ce{SO2}$ (b.p. −10 °C) is known as a versatile solvent (yet not particularly pleasant to work with) for a wide range of organic and inorganic compounds having limited solubility in ...
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How to safely alloy magnesium castings into aluminum?
I want to dissolve previously sand cast magnesium to molten aluminum to create an aluminum magnesium alloy. Of course I want to do this as safely, and inexpensively, as possible. I have an electric (...
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Is hydroxylamine monodentate or ambidentate ligand?
What is the total number of geometric isomers of the complex $\ce{[Pt(Cl)(py)(NH3)(NH2OH)]+}$?
If $\ce{NH2OH}$ acts as an ambidentate ligand, then there should be six geometric isomers. Or is it ...
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Can proton NMR be used to study transition metal complexes?
I prepared metal complexes with a Schiff base ligand L using cobalt(II) chloride hexahydrate, iron(III) chloride hexahydrate, and nickel(II) nitrate hexahydrate. I used 1H NMR to study the difference ...
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What are oxidation numbers of each element in CuH?
My chemistry teacher said hydrogen when bonded with metals has oxidation number (O.N.) of −1 except CuH: in CuH the hydrogen has O.N. +1 and the copper has O.N. −1.
But on the internet it is ...
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Evaporation of zinc oxide
My question involves the evaporation of silicate material (e.g., rocks, minerals, geologic material), specifically I am trying to work the number of electrons (n) that are involved in the evaporation ...
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Does solid manganese reacts with atmospheric air when heated?
As discussed in my answer, manganese is not particularly reactive to air. The surface of manganese lumps oxidize to a minor extent but when it is finely divided, it becomes pyrophoric and burns in air....
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How do you determine the charge of the metal ion in a single replacement reaction? [closed]
Say we have a simple single replacement reaction between a salt and a metal
$$\ce{2 AgNO3 + Cu -> Cu(NO3)2 + 2 Ag}$$
We know in normal circumstances, silver always has a $+1$ charge, and in normal ...
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Electrolysis when E_cell = 0
I'm a bit confused by the electroplating of Zinc onto Copper, with Zinc (anode) and Copper (cathode) electrodes in a Zn(NO3)2 solution.
The reduction reaction is: Zn2+ + 2e- ---> Zn (s) (E_rxn = -0....
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Displacement Reaction [closed]
In a displacement reaction I understand that the more reactive metal essentially takes the place of the less reactive metal. But I can't seem to understand how this more reactive metal can break the ...
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Relative stability of $\ce{V^2+}$ and $\ce{V^3+}$ and their Standard Electrode Potential
My book - NCERT Chemistry for Class XII -Page 218 Contains the following paragraph:
Initially they mention that the Low value for Standard Electrode Potential of $\ce{Sc^3+/Sc^2+}$ is due to the ...
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Determining iron(III) content in mixture of iron(II) and iron(III) [closed]
Problem
Outline a plan of an experiment to determine the percentage of iron present as iron(III) in a solution containing $\ce{Fe^3+(aq)}$ and $\ce{Fe^2+(aq)}$ ions. You are provided with zinc, a ...
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Melting and boiling point of transition-metals, primarily for the groups of Cr and Mn [duplicate]
The NCERT Chemistry book for Grade 12 writes
The high melting points of these metals are attributed to the involvement of greater number of electrons from $(n-1)d$ in addition to the ns electrons in ...
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Which d block elements in their unipositive ion state show reorganisation and transference of electrons from 4s to 3d?
This question serves as elaboration of another previously asked question.
The irregular trend in ionization enthalpy of 3d elements
I'll be breaking down the cited phenomenon into steps, according to ...
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Why does low spin character predominate in hexafluoronickelate(IV)?
According to my book there are no unpaired electrons in $\ce{NiF6^2-}$. However, that should not be the case since fluoride is a weak field ligand. Why does hexafluoronickelate(IV) behave as a low ...
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Atomic Radius of Manganese and Chromium
It is clearly a general trend that the atomic radii of the 3d elements in ascending order of atomic weight, leads to the following trend as in the graph below.
But, it was pointed out to me that, Mn ...
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Permitted composition of lithium oxometallate in lithium-ion battery and its influence on ion transfer
The following scheme describes the overall reaction that takes place in a Li-ion battery:
$$
\begin{align}
\ce{Li_{$y$}C6 &-> $y$ Li+ + $y$ e- + C6} &\quad &\text{(anode)} \tag{R1}\\
\...
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Is boiling aqueous solution of copper(II) sulfate safe?
I want to create saturated coper(II) sulfate solution in order to grow crystals. Is boiling a solution of copper sulfate at home safe? Are there any risks? Is the vapour pure water?
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Can a carbon that has 5 bonds be explained by saying that one of its bonds is a coordination bond?
In my organometallic chemistry class at the university, the doctor told us that compound μ³-CO-[Fe₄(CO)₁₂]²⁻ had the structure that appears in the image. As you can see, there is a pentavalent carbon.
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How to promote oxidation of copper(I) chloride to copper(II) chloride with oxygen in solution?
I recently discovered that copper(I) chloride in hydrochloric acid can react at about 80 °C with bubbled-in oxygen gas and oxidize into copper(II) chloride. I found almost no documentation on the web, ...
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Exceptional electronic configuration of Chromium
I understand that the reason for the exceptional electronic configuration of Cr is the increased stability of half filled set of orbitals
But here's an excerpt from my textbook
…consider the case of ...
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Ionic radii of transition metal ions in the presence of weak field and strong field ligands
In the graph given in this image, I was told by my teacher that whenever we start filling the eg orbitals there is an increase in the radius because these orbitals face the ligand directly ...
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Is triazanido(methyl)iron(IV) low-spin?
I was messing around on WebMO when I suddenly remembered that tetrakis(4-norbonyl)iron(IV) was diamagnetic, despite its tetrahedral coordination.
Knowing that late metal complexes in extremely high ...
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Which ion is more stable in aqueous solution; Co2+, or Co3+? [closed]
We know $\ce{Co^{3+}}$ is more stable in complex compounds than $\ce{Co^{2+}}$ is in the same. I am told that for aqueous solution, $\ce{Co^{2+}}$ is more stable than $\ce{Co^{3+}}$, however in ...
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Electronic states of VO vanadium oxide in $C_{2v}$ point group
The electron configuration of $V^{2+}$: ... 3$d^{3}$ with 3 d electrons in 3 d orbitals. In $C_{\infty v}$, $d_{xz}$ and $d_{yz}$ have $\Pi$ IRREP; $d_{z}^{2}$ has $\Sigma^{+}$ IRREP; $d_{x^{2}-y^{2}}$...
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Is tetraoxidocobaltate(V) low-spin
After hearing that hexaamminecobalt(III) and hexafluoridonickelate(IV) are both low-spin due to the central metals' high oxidation states(even though both bear pi-donor ligands), I began to wonder if ...
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The higher energy to transform Cu(s)/Cu^2+(aq) is not balanced by its hydration enthalpy
The book says that "the higher energy to transform Cu(s)/Cu^2+(aq) is not balanced by its hydration enthalpy". I also read that when we add energy of sublimation and ionization energy , ...
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Contribution, and the way thereof, of the core 6p orbitals of compounds of plutonium(VIII)
According to the NIST database, the ground-state configuration of plutonium(VIII) is [Hg]5f³6p³, when intuitively it should be the same as neutral radon([Hg]6p⁶). Since plutonium(VIII) compounds are ...
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Is Co(2+) easily oxidised to Co(3+)? [closed]
I think this question lacks some required informations but that's exactly what was given on my question paper. I thought of explaining this in descriptions of crystal field theory but I couldn't solve ...
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What exactly is oxidation number with regards to [Fe(CN)6]-4 [closed]
I read that $\ce{Fe}$ has an oxidation state of $+2$ in $\ce{[Fe(CN)6]^{4-}}$. Does that mean $\ce{Fe}$ gives away $2$ electrons? Doesn't $\ce{(CN)6}$ form coordination bonds with $\ce{Fe}$ meaning $\...
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How to predict colour of precipitate? [duplicate]
I am currently preparing for Junior science competitions and I am coming across many questions where colour of precipitate plays important role... Like
When compound $\ce{Hg2(NO3)2}$ reacts with $\ce{...
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Why is copper a better conductor of electricity than calcium?
How would we compare the electrical conductivity between copper and calcium? I understand that electrical conductivity of a metal is dependent on the number of delocalized electrons for that metal. ...
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What determines the kind of Bravais lattice structure (body-centred cubic, hexagonal, etc) a transition metal shows?
With the exception of Zn, Hg, Cd and Mn transition metals most transition metals have only one kind of lattice structure at room temperature. Another trend I noticed was that Groups 3 and 4 have ...
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Why is it that not all metals produce hydroxides when reacting with water? [duplicate]
I was taught, as a rule, that:
metals + water $\rightarrow$ metal hydroxide + hydrogen gas
$$\text{Na} + \text{H}_2\text{O} \rightarrow \text{NaOH} + \text{H}_2$$
However:
$$3\text{Fe} + 4\text{H}...
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Exchange energy of d6 configuration
In NCERT Chemistry book, it is given as:
Exchange energy is responsible for the stabilization of energy state. Exchange energy is approximately proportional to the total number of possible pairs of ...
user112344
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How can we predict the formula of a coordination compound by just knowing the ligand and central metal? [closed]
Question:
On complete reaction of $\ce{FeCl3}$ with oxalic acid in aqueous solution
containing $\ce{KOH}$, resulted in the formation of product A. The secondary valency of $\ce{Fe}$ in the product A ...
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Does concerted oxidative addition follow first-order kinetics?
So my professor for organometallic chemistry described the different mechanisms for oxidative addition and in talking about the concerted mechanism he said that it had first order kinetics. I find ...
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How to compare magnetic moment of chromium(III) and cobalt(II) ions?
Is there any way of comparing the magnetic moments of $\ce{Co^2+}$ and $\ce{Cr^3+}$ gas phase ions by just going through their electronic configuration?Or is it just experimental data?
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Why is it advised to use neutral ferric chloride solution while performing confirmatory test for acetate ions? [duplicate]
The reaction of $\ce{FeCl3}$ with $\ce{CH3COO-}$ is
$$\ce{3Fe^{+3} +6CH3COO- +H2O<=> [Fe3(OH)2(CH3COO)6]^{+} +2H^{+}}$$
Recently I read that a solution of $\ce{FeCl3}$ hydrolyses very quickly to ...
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Is tetrachloridocuprate(II) formed when dilute hydrochloric acid is added to a solution containing tetraamminecopper(II)?
As observed in the lab, when concentrated $\ce{HCl}$ is added to a solution of deep blue $\ce{[Cu(NH3)4]^2+}$ a green color appears indicating the partial formation of the yellow colored $\ce{[CuCl4]^...
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