Questions tagged [inorganic-chemistry]
Inorganic compounds generally do not have C-H bonds, while organic compounds do have such bonds. The distinction between inorganic and organic chemistry, however, is far from absolute.
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Why is copper(II) used a catalyst here instead of as an intermediate?
Photochromic glass, used for sunglasses darkens when exposed to bright light and becomes more transparent again when the light is less bright. The depth of color of the glass is related to the ...
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problems with solving ph [closed]
[a]An aqueous solution has a pH of 4.0. (i) What is the hydrogen ion concentration of the solution? (ii) What effect will the solution in [ai] above have on a litmus paper?
b Which of the following ...
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Why isn't chlorine reduced or nitrogen oxidised in the reaction between ammonium perchlorate and aluminium?
A space shuttle’s upward thrust came from the following reaction between aluminium and ammonium perchlorate.
$$\ce{10 Al + 6 NH4ClO4 → 4 Al2O3 + 2 AlCl3 + 12 H2O + 3 N2}$$
Which statements about this ...
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Why did my synthesis of calcium peroxide fail?
I dissolved calcium acetate in about $\pu{80 mL}$ of water and added $\pu{30 mL}$ of 60% peroxide. I should have obtained calcium peroxide which is insoluble in water, but i saw no precipitate. I read ...
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Do solid insoluble ions react with soluble ions in aqueous solution?
Do solid and insoluble ions (like aluminium phosphate) react with soluble ions in aqueous solution (like potassium sulfate)? When would a solid ion react with an ion in aqueous solution in general?
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Adding a base and a salt to a hydrated complex
The question goes like this:
$\ce{Fe(NO3)3}$ V= $\pu{1 liter}$ and $\ce{[Fe(NO3)3]} =\pu{0.1 moles/liter}$.
Calculate the $\mathrm{pH}$ of this solution using the values of $K$ given.
We add a solid ...
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Has mercury(II) cyanate ever isolated as a free compound?
Recently, I have answered a question "Comparing explosive properties of mercury(II) cyanate and mercury(II) fulminate" where stability of cyanate vs fulminate was discussed. While I was ...
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Could an extremely strong reducing/oxidising agent attack nitrogen molecules?
Could a very strong reducing agent like lithium aluminium hydride or a very strong oxidizing agent like manganese heptoxide react with $\ce{N2}$? Usually when people talk about reactive substances ...
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What surface treatment can turn nickel black?
Questions:
The detailed surface treatment to turn nickel plated steel black.
The reaction mechanism of the process.
Methods:
(preferred) Anodizing, oxidizing : The only black nickel oxide is $\ce{...
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What Chemical could this be? [duplicate]
I am trying to work out if this is a chemical and if so what chemical it could be? If not what else could it be?
I did a previous post but my drawing was not correct as was highlighted by someone else ...
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Backbonding in phosphorous pentoxide
I read this today in a book that $\ce{P=O}$ in $\ce{P4O10}$ consists of a coordinate bond and pπ-dπ backbonding, but why does this happen?
Can't phosphorus share its lone pair with one of the lone ...
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i need help for this question [closed]
Consider the decomposition of hydrogen peroxide reaction. If the rate of decomposition of hydrogen peroxide at a particular temperature is determined to be 0.098 mil/(L•s), what are the rates of ...
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What Chemical Could This Represent [closed]
Update
I found someone else who has been trying to solve the same problem and they said that my drawing was not correct. We had a discussion and I conceded that his monochrome picture is more square ...
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How can I make hydrochloric acid from hypochlorus acid and hydrogen peroxide [closed]
Can I make $\ce{HCl}$(aq) by reacting $\ce{HOCl}$(aq) and $3$% aq. $\ce{H2O2}$ to form $\ce{HCl}$(aq) and $\ce{O2}$(g)?
Would storing it for week in a closed bottle work? If not, then what should I ...
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How can I bring down the pH of corrosive substance leaving its physical properties intact [closed]
I am developing geopolymers with with kaolinite clay, calcium hydroxide activated with sodium carbonate solution. The alkalinity of the mix is too high to handle.. what can i do to bring it down
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Reaction of copper with nitric acid [closed]
$\ce{Cu}$ reacts with $\ce{HNO3}$ though $\ce{Cu}$ cannot replace $\ce{H}$ due to its less reactivity. Then, why does it react with $\ce{HNO3}$?
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Xe compounds - without O or F
I may be wrong, because this is purely based on observation-Is it true that Xe does not form compounds without O or F?
If yes, could you please elaborate the reason behind it?
(I have a basic ...
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Why doesn't PH5 exist? [duplicate]
I have a basic understanding of VBT, hybridisation and VSEPR. However, I still can't come up with a reason as to why $\ce{PH5}$ doesn't exist while $\ce{PH3}$ and $\ce{PCl5}$ do.
Can anyone please ...
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Order of stability of allotropes of phosphorus
I want to know the stability order of allotropes of phosphorus. Upon searching I realised that two types of stabilities are defined in their case
kinetic
thermodynamic
But I am somewhat confused (...
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How to get or understand a sample in chemistry without knowing its chemical name or compound or formula [closed]
How to get or understand a sample in chemistry without knowing its chemical name or compound or formula? I was thinking about whether there is a way to understand what the chemical compound sample ...
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Why cupric ion oxidises iodide to iodine
I have learnt in the qualitative analysis of cupric ions that upon treating its aqueous solution with excess $\ce{KI}$, triiodide ions are formed which can be further tested using starch.
The ...
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Parallel between polarisability of donor atom and crystal field split strength
Observing the strength of crystal field splitting by different ligands, I drew up the following:
Most of the members in the series are ligands where the donor atom is nitrogen, oxygen or carbon.
If ...
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2answers
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The color of the most sulfides of p- and d-block elements
My teacher said that many of the sulfides of d-block and p-block are black. Why?
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Formation of Goethite
Probably a simple question: When you're mixing potassium hydroxide ($\ce{KOH}$) with iron nitrate ($\ce{(FeNO3)3}$) to form ferrihydrate, does the temperature have to be below $\pu{60 ^\circ C}$?
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Hydrolysis of magnesium boride
Does magnesium boride react with water to form boranes?
My attempt:
Magnesium nitride reacts with water to form ammonia and magnesium hydroxide.
Similarly, does magnesium boride also react with water ...
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How to find the stoichiometric amount of nitric acid reacting with tin?
To find the amount of $\ce{HNO3}$ behaving like an acid in the reaction
$$\ce{Sn + HNO3 -> Sn(NO3)2 + NH4NO3 + H2O},$$
I first balanced the reaction using oxidation number method which gave me
$$\...
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Conducting cyclic voltammetry in an air sensitive manner
Does anyone have suggestions on ways to conduct cyclic voltammetry on an air sensitive material without shipping the entire set up into a glovebox?
This is for redox active organometallic compounds.
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Inorganic chemistry - please suggest! [duplicate]
Can any one suggest a book of inorganic chemistry that has a lot of problems? Both Mcqs and subjective questions should be there. And the textbook should also be useful for chapters about reactions ...
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Electronic Configuration of Lanthanum [duplicate]
Lanthanum has electronic configuration [Xe] 4f0 5d1 6s2. Why is the 4f sub-shell not filled even though we know that 4f is filled before 5d subshell?
I know that for some elements energy level of 4f&...
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Why is phosphorous pentoxide a dehydrating agent?
$$\ce{HNO3 + P2O5 -> 2HPO3 + N2O5}$$
In this reaction, both nitrogen and phosphorus have the same oxidation number before and after the product is formed. Since the $+5$ oxidation of nitrogen is ...
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Separating sodium sulfate from chromium trioxide solution
I was looking at the industrial process for the production of chromium trioxide by treating sodium chromate or the corresponding sodium dichromate with sulfuric acid. This results in the formation of ...
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Can you turn lead dioxide into lead?
I've read that you can reduce lead oxide to lead by heating it with carbon. Does this also work with lead dioxide?
I took apart an old lead-acid car battery and realised then, that there are almost ...
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Catalysts and activation energy
Do catalysts increase rate of reaction only by decreasing activation energy? Or can they affect the Arrhenius factor or reaction orders? Like if one catalyst is more effective at increasing rate of ...
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Can the unshared electrons present in D block metals can be considered as lone pairs?
Having doubt,how to decide whether an unshared pair of electrons is lone pair or not..
Another doubt I have is that VSEPR theory states that the lone pairs influence shape of compounds..do the same ...
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Why does an mercury ore exist as HgS?
Cinnabar($\ce{HgS}$) is one of the most common ores of mercury.
Why does it not exist at $\ce{HgO}$ or some other such compound?
Is there any reason for why it is so prevalent?
Does it react less ...
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Crystal Field Theory
When I learned about crystal field theory I had fallen on a paradox. When K4[Fe(CN)6] is formed then three d orbitals are occupied by electrons of Fe2+ pairly and the rest two d orbitals are occupied ...
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Why is polonium tetrafluoride non-existent?
I learnt that the group 16 elements can form halides, but with the exception that polonium cannot form a tetrahalide with fluorine.
However, I thought that it was possible. This is because the ...
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Why does this ligand form 6-coordinate complexes with Transition elements and 8-coordinate complexes with Inner transition elements? [closed]
What change takes place in the denticity of this ligand if it is an inner-transition metal ion vs a common transition metal?
Primarily, why does the ligand behaves differently with the two situations ...
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How are solutions prepared from hydrated compounds? [duplicate]
Preparation of solutions from hydrated compounds
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What grade of sodium fluoride is needed for preservation of urine for drug and alcohol testing?
We are preparing DUI test kits and the distributor we purchased our sodium fluoride vials from is no longer in service. We are having difficulty finding a new supplier. Would food grade work for ...
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Potassium tetraoxalate preparation [closed]
How is potassium tetraoxalate produced industrially? In fact How I can limit the reaction of $\ce{H2C2O4}$ and $\ce{KOH}$?
Or is there any other route for this purpose?
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Hydrolysis of alkali and alkaline earth metals
Which of the following cations are not hydrolysed in aqueous solution?
1) $\ce{Mg^2+}$ 2) $\ce{Ca^2+}$ 3) $\ce{Na+}$ 4) $\ce{K+}$
I thought nothing would undergo hydrolysis, so all the options would ...
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Covalent character in group 12 chlorides
What is the correct order of covalent character of $\ce {HgCl2}$ , $\ce{CdCl2}$ and $\ce{ZnCl2}$? Different sites seem to give different answers.
My perception is that the covalent character should be ...
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Reducing pressure and calculation of concentrations at equilibrium
For the equilibrium
$$\ce{PCl5(g) <=> PCl3(g) + Cl2(g)}$$
$$ K_c = \pu{4.16E-2 mol dm^{-3}}~\text{at}~\pu{250 °C}$$
$$[\ce{PCl3}] = [\ce{Cl2}] = \pu{0.204 mol dm^{-3}}$$
If the pressure of ...
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Reaction of Silicon Dioxide with Hydrofluoric Acid [duplicate]
I learnt that $\ce{SiO2}$(Silicon dioxide) doesn't react with any acid except $\ce{HF}$. So what is special about $\ce{HF}$?
Why does only $\ce{HF}$ reacts with $\ce{SiO2}$ even though $\ce{HF}$ has a ...
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Comparing explosive properties of mercury(II) cyanate and mercury(II) fulminate
I found this question online on Jiskha Homework Help:
Of the compounds mercury(II) cyanate, $\ce{Hg(OCN)2},$ and mercury(II) fulminate, $\ce{Hg(CNO)2},$ one is highly explosive, the other is not. ...
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How to chemically mix silicon rubber liquid and calcium carbonate
chemically means that will fulfill the requirements of chemical mixture, substance , compound etc. to make a pigment. what basic properties do we need to see when mixing two chemicals for perfect ...
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Disproportionation of silver(I) in aqueous solution
Use the following equations to predict whether or not $\ce{Ag+}$ ions will disproportionate in solution:
$$
\begin{align}
\ce{Ag+(aq) + e- &-> Ag} &\qquad E^\circ = \pu{+0.80 V}\\
\ce{Ag^2+(...
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Is it easier to oxidise iron(II) to iron(III) in acidic or alkaline solution? [closed]
Is it easier to oxidise $\ce{Fe^2+}$ to $\ce{Fe^3+}$ in acidic or alkaline solution?
$$
\begin{align}
\ce{Fe &-> Fe^2+(aq) -> Fe^3+(aq)}\\
\ce{Fe &-> Fe(OH)2 -> Fe(OH)3}
\end{align}...
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What is the chemical formula for the synthesis of Hydroxyapatite (Ca10(PO4)6(OH)2)?
This might be a basic question but I am a little confused.
I have some lecture notes that says calcium phosphate ($\ce{Ca3(PO4)2}$) reacts with calcium hydroxide ($\ce{Ca(OH)2}$) to form ...
