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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How does Potassium Hexfluoronickelate(IV) exist in a stable state?
Nickel generally does not exist in a $+4$ Oxidation state. Wikipedia has the following to say regarding Nickel(IV):
Ni(IV) is present in the mixed oxide $\ce{BaNiO3}$. ....... Ni(IV) remains a rare ...
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Is there any proven effect of spraying aerosol on evaporation of water?
Yesterday I was performing extraction of sodium chloride from its saturated solution in water by placing a bowl containing the solution under the hot sun. There wasn't much change in the volume of ...
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Indicator for H2S [closed]
In there an indicator for sulfur compounds like H2S (also organic)?
Or some straight forward way to measure if the H2S concentration in the air is higher than usual? Or is the concentration too low ...
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What is the mutltiplicity of each carbon in Methyl propyl ether? [closed]
For 1H NMR
CH3-O-CH2-CH2-CH3
I think from left to right:
CH3 - singlet
CH2 - triplet
CH2 - sextet
CH3 - triplet
I am unsure if this is correct?
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Synthesis anhydrous AlCl3 [closed]
It is said that $\ce{[Al(H2O)6]Cl3}$ can be dehydrated to AlCl3 by heating while passing over dry hydrogen chloride gas.
My question is- can this be done with 100% $\ce{[Al(H2O)6]Cl3}$, or does some ...
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Finding the partial pressure
So I saw this problem but can't seem to figure out how to get the answer. I got a test tomorrow lol.
41) $\ce{SO2Cl2}$ decomposes in the gas phase by the following reaction:
$$\ce{SO2Cl2 -> SO2(g)...
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Energy from liquid to solid [closed]
Compute the energy released as heat at 1 atm when 25.0 grams of liquid mercury at 300.0°C is converted to solid mercury at –60.0°C. Take the heat capacity of Hg(s) to be 28.3 J/mol^-1K-1.
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Coordination number of chromium(III) oxalate complex
The coordination number refers to the number of binders that interact with the central metal ion. So, in the complex $\ce{[Cr(C2O4)3]^3-}$ chromium is bound to three oxalate ions.
Why its ...
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What gas is evolved when using vinegar, hydrogen peroxide, and salt to etch copper, and why?
The question of how vinegar + hydrogen peroxide + table salt can be used to etch copper has been asked before (Full equation when using vinegar, hydrogen peroxide, and salt to etch copper). However, ...
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Colour of VO3^-?
To aquire the yellow colour of vanadium ion, it must be present in a 5+ oxdiation state.
This can be acheived (according to my textbook) by adding dilute sulfuric acid to $\ce{NH4VO3}$, then followed ...
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Se+P White or red P?
I read this in an old chemistry book. It says:
When selenium is dropped into melted phosphorus, it dissolves rapidly, and the compound sinks through the liquid phosphorus in red streaks.
My ...
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Controversy of acidic character of acetylene [duplicate]
Bond between carbon and hydrogen in acetylene is sp-s bond, it has very good overlap (and thus high bond strength) as compared to sp2-s or sp3-s C-H bond in ethylene or ethane. But Acetylene is more ...
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Violation of Fajans' rule
According to Fajans' rules, greater charge in an ionic compound results in more covalent character. But why is it that sodium oxide is more covalent than magnesium oxide? Google says boiling point of ...
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How is the bonding in the [Au6C(PPh3)6]2+ cluster explained?
How can carbon form six bonds in such a compound as $\ce{[Au6C(PPh3)6]^2+}?$ I understand how carbon with five bonds can be formed $(\ce{CH5+},$ for instance), but it shouldn't have enough electrons ...
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Understanding sodium hydroxide drain cleaner's exothermic dissolution of aluminum; does the aluminum need to be oxidized before it dissolves?
I'm not a chemist but I remember that the standard HF/nitric silicon etch used in micro-fabrication supposedly worked in two steps; the HF would dissolve the thin SiO2 oxide layer on the silicon ...
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Is there a name, or any specific jargon for a precipitation equilibrium involving a solid reactant?
Let's say you have some ions in solution, for example Na+(aq) and OH-(aq), and some partially dissolved solid, MgCO3(s), Mg+2(aq) and CO3-2(aq), which precipitates Mg(OH)2(s) until equilibrium.
So ...
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Comparison of I-F, Br-F, and Cl-F bond strengths
From Chemistry of the Elements by Greenwood and Earnshaw [1, p. 833]:
Figure 17.9 Mean bond energies of halogen fluorides.
This shows the mean bond energy for $\ce{X-F}$, where $\ce{X}$ is a ...
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The second Ionisation energy of the Zn, Cd, and Hg follows the order?
It is observed that the order of second ionisation energy of these three elements is Zn > Cd < Hg.
Why is there an anomaly in the observation?
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Explanation for differences between lattice enthalpy for MgF2 calculated theoretically and experimentally [closed]
Theoretically higher energy is released (−2915 kJ/mol) while experimentally less energy is released (−2908 kJ/mol). What is the explanation for it?
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Will NaF + CaCO3 precipitate much CaF2?
If I mix sodium fluoride, calcium carbonate powder, and water, under what conditions (if any) would there be an equilibrium?
I.e. assume we start out with fully dissociated $\ce{Na+(aq) + F-(aq)}$, ...
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SQUARE PYRAMIDAL GEOMETRY
I had this question on a test as to what would be the bond angles in square pyramidal geometry ?
According to me lp-bp repulsion being greater than bp-bp repulsion the angles would deviate from ...
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How can AuCl3 exist?
The reduction potential for $\ce{Au^3+ + 3e- -> Au}$ is $1.503 \text{ V}$. The reduction potential of $\ce{Cl2 + 2e- -> 2Cl-}$ is $1.36 \text{ V}$. So, the $E^o$ for $\ce{2Au^3+ + 6Cl- -> 2Au ...
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Finding spin using valence bond theory [closed]
Why is $[\ce{Fe(CN)6}]^{3−}$ a low spin complex even though it has a free electron?
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2 step synthesis of potassium sulfate [closed]
I am trying to synthesize potassium sulfate from potassium bicarbonate using a 2 step process. During the first run I first react a small solotion of the potassium bicarbonate (85% pure) with a ...
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What is the difference between cyanato, cyanido and cyano? When should i use which? [closed]
I understand that cyanido is the newly adopted naming in place of cyano but what is cyanato? Can anyone please give examples to illustrate the difference?
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Why does SiH4 have unusually large bond angles?
The bond angles of $n > 2$ hydrides are usually around $90^\circ$, such as $\ce{PH3, H2S},$ $\ce{H2Se},$ $\ce{H2Te}.$ I understand that this is from increased $\mathrm{p}$ character in the bonding ...
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Carbonyl chloride from stabilized chloroform treated with hydrogen peroxide
In our lab, chloroform contains 0.5–1% ethanol to prevent it from producing carbonyl chloride when exposed to UV light.
Will the following reaction occur using such chloroform?
$$\ce{CHCl3 + H2O2 -&...
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How can sulfur dioxide and nitric oxide be filtered out from a waste incinerator's smokestacks? [closed]
How can sulphur dioxide and nitric oxide be filtered out from a waste incinerator's smokestacks?
I also want to know what it looks like after it is filtered out.
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What is the yellow compound formed in electrolysis of brine?
Last week, I tried to conduct electrolysis of brine in my house using copper electrodes and 6V battery. After sometime, the entire solution turned orange/yellow. The yellow substance formed a kind of ...
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What happens and what do we observe during this qualitative analysis of bronze? [closed]
What is the observation when we add $\ce{HNO3}$ to bronze followed by addition of dilute HCl and bubbling of $\ce{H2S}$ gas through it.
Please tell the inferences as well.
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How to calculate the energy to dissociate a bond into neutral atoms?
I am self studying chemistry through MiT ocw 5.111 . On practice exam 2 problem 2 there is a question which states the following
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Ideal characterization technique to study behavior of heated metal nitrates
I have 3-4 metal nitrates as precursors for my coprecipitation reaction. I need to study the behavior of each individual nitrate and also of various combinations at 60 degrees Celsius, which is my ...
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Why is iron pentacarbonyl known, but iron(III) hexacarbonyl is not?
Why is the neutral complex $\ce{[Fe(CO)5]}$ known, but the cationic carbonyl complex $\ce{[Fe(CO)6]^3+}$ is not known?
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Murexide or eriochrome black T for EDTA titration with milk
Should I use Murexide or eriochrome black T for EDTA titration with milk? I am heating the milk to different temperatures and trying to find how the amount of calcium differs (or doesn't).
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Predicting colors of aqueous solutions
While going through my AP chem prep book again, I came across questions asking about the color of certain aqueous solutions. For example:
Which of the following substances will produce a colorless ...
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Can Ca and K exist as an ionic compound?
Recently in the Chemistry.SE chatroom a user posted this to celebrate the New Year:
Can Ca and K exist as an ionic compound? If not, why is it impossible?
Ca with atomic number 20, K 19
so 2019 -...
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Neutralizing a sulfuric acid spill
From my AP Chem Prep Book:
What should you do if you spill sulfuric acid on the countertop?
A) Neutralize the acid with vinegar.
B) Sprinkle solid NaOH on the spill.
C) Neutralize the acid ...
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Chemical balance problem
The ammonium chloride dissociates at 317 ° C according to the reaction:
$$\ce{NH4Cl (s) -> HCl (g) + NH3 (g)}$$
reaching a total pressure of 500 mm Hg in equilibrium in a closed container. What ...
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Lattice enthalpy and ionic charater
As we move down in sulphates of group 2 their solubility decreases because there is a drastic decrease in hydration enthalpy as compared to decrease in lattice enthalpy.
Does the decrease in lattice ...
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pH responsive polymer which is immiscible in water?
Can anyone suggest a pH-responsive polymer, which is immiscible in water (polar solvent) but miscible in oil (e.g vegetable oil)?
I want to study the change in the density of such polymers when they ...
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Does a halonium ion for astatine exist?
I've just begun reading about halonium ions and I noted that only the first four halogens are acknowledged to be able to form halonium ions, but hydrogen astatide can be formed.
I can't seem to find ...
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Can you dissolve iodine without potassium iodide? [closed]
I don't have a sufficient amount of potassium iodide, so I wanted to know if there is other way which I can use to dissolve iodine without using potassium iodide.
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Some special cases of inner orbital complexes
Following statements are for $\ce{[Co(CN)6]^{4-}}:$
$\ce{[Co(CN)6]^{4-}}$ has the configuration $\mathrm{t_{2g}^6 e_g^0}$ but is paramagnetic because the last electron resides in $\mathrm{5s}$ ...
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Definition of t2g orbitals in CFT
My textbook defines $\mathrm{t_{2g}}$ orbitals as
$\mathrm{t_{2g}}$ stands for a set of three orbitals which are asymmetric with respect to $C_2$ axes, perpendicular to the highest $C_n$ axes, but ...
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Emulsification and liquid liquid surface reaction [closed]
What will happen if I skip the addition of surfactant?
will the reaction happen only at the surface of the parent liquids?
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Compounds with aluminum and nitrogen atoms directly bonded to each other as part of an aromatic ring?
Just hours ago, I asked a question about whether aromatic organoaluminum compounds with aluminum and carbon bonded together as part of an aromatic ring would be stable in water. The answer seemed to ...
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Do tetrachloroaluminate salts hydrolyse?
Tetrafluoroborate salts, such as lithium tetrafluoroborate, are reasonably stable in aqueous solutions. Does the same hold for sodium tetrachloroaluminate as well or does it end up as $$\ce{NaAlCl4 + ...
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Synthesis of the tetrachloroaluminate(III) anion
Looking for random chemicals, I found a reference on the anion and thought that it could be synthesised from common laboratory reagents:
$$
\begin{align}
\ce{2 Al + 2 NaOH + 2 H2O &-> 2 NaAlO2 ...
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when Al2O3 melts which bonds are broken?
Previously, I was trying to understand why $\ce{Al2O3}$ has a lower melting point than MgO. An answer on quora said
Do not confuse the character of the bond between the metal and oxygen with the ...
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2answers
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What is the relation between solubility and thermal stability? [closed]
The thermal stability of alkaline earth metals increases down the group for hydroxides i-e., Be(OH)2 is less stable than Ba(OH)2.
The solubility also increases down the group for these compounds i-e., ...
