New answers tagged inorganic-chemistry
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Why does concept of degree of unsaturation not work for fullerene molecule?
An alkane with 60 carbon atoms has the formula $\ce{C60H122}$. To get the degree of unsaturation of fullerene, you have to successively add dihydrogen to it until you have an alkane. For each double ...
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Iodine solution concentration
$\ce{I2}$ has a molar mass of $254$ g/mol. $\ce{KI}$ has a molar mass of $39 + 127 = 166$ g/mol.
Then $1.3$ g $\ce{I2}$ is $\frac{1.3}{254} = 5.12$ millimole $\ce{I2}$.
Also $2$ g $\ce{KI}$ is $\frac{...
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Why potassium carbonate breaks glass when heated?
If the beakers are not made of borosilicate glass, it will react with the metal carbonate and break the glassware:
Fusion with an alkali metal carbonate, usually anhydrous sodium or potassium ...
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What's the formal definition of a ceramic in chemistry?
A keramics is an opaque substance made from different amounts of different oxides in non stoichiometric amounts and homogenized by heating to a high temperature. The temperature must be high enough to ...
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"Fireblob" in KO₂ and PCl₅ reaction
Here's my best guess at the play-by-play.
$\ce{PCl5}$ is a solid with a relatively low melting point (160 °C) and high volatility (sublimes at 167 °C). When the solid $\ce{KO2}$ gets dropped on the $\...
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Structure of AgNO2 and AgONO
The reference[1] mentioned in the comments shows that the reaction of silver nitrite with alkyl halides produces predominantly the nitro compound, $\ce{R–NO2}$ with over $80$% yield. This suggests ...
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Structure of AgNO2 and AgONO
The crystal structure of silver nitrite has been published at least three times, with different silver nitrogen bond lengths leading to different conclusions:
In the 1981 paper (Structure of silver (I)...
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Structure of AgNO2 and AgONO
I will attempt to answer what I think is an underlying question, "How is charge distributed in the nitrite ion?". If this question is answered, then which is the correct structure for silver ...
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Why do most sulphate salts have water of crystallization in them?
Sulfates commonly do have water of hydration, but so do many other salts such as chlorides. For instance, iron chlorides used in laboratory experiments at my job are commonly bought as $\ce{FeCl2•4H2O}...
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NaCl Unit Cell - Chloride Ions on the edges or corners?
NaCl crystallizes in the Fm-3m space group (where the underlying lattice is F, namely face-centered).
Na atoms are usually located (in the structural description) at the 4a Wyckoff site (coordinates: ...
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NaCl Unit Cell - Chloride Ions on the edges or corners?
The commonly accepted unit cell is a face center cubic (FCC) chloride structure with all octahedral sites filled with sodium cations. Typically, we construct the framework of the unit cell with the ...
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why are there no pictures or experiments on solid ozone?
The color of liquid ozone is documented in sciencemadness.org:
Liquid diatomic oxygen, for comparison:
The color difference is similar to what we see between aquo and ammine complexes of copper, and ...
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Which of the following might turn NaNO2 into N2?
To get N2 from NaNO2, NaNO2 must be reduced right, So we need a reducing agent which oxidizes itself and would reduce NaNO2
Now look at the options
Let's see HNO3, the oxidation state of Nitrogen is ...
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Does CsBr have BCC lattice or cubic?
Lattice and crystal structure are two different objects. A lattice exists in the geometrical space and is formed by lattice points characterized by having the same geometrical properties; on these ...
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Calculating the pH after adding hydrochloric acid to the potassium hydrogen phosphate solution
I got pH of 7.34, but the answer sheet says 6.97. What did I do wrong?
I'm showing here where you make the mistake as an answer to your above question (If you have already compared your answer to ...
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Mulliken Labels: How do I tell apart E, doubly degenerate, symmetry apart from T, triply degenerate, symmetry for a molecular orbital?
First of all — it should be noted that this is not a unique representation of the $\mathrm{e_g}$ set. You can take any two linear combinations of these two orbitals (i.e. add and subtract them), and ...
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Calculating the pH after adding hydrochloric acid to the potassium hydrogen phosphate solution
There is initially $\pu{0.02 L} \cdot \pu{0.2 mol/L} = \pu{0.004 mol}\ \ce{HPO4^2-}$
There is added $\pu{0.01 L} \cdot \pu{0.25 mol/L} = \pu{0.0025 mol}\ \ce{H+}$
This leads to approximately $\pu{0....
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Non-octet structures of stable nitrogen compounds
Your comparison of the nitrogen oxides with phosphorus pentachloride is not apt. The former have unpaired electrons whereas the latter has multicener bonding with all electrons paired. These represent ...
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Mulliken Labels: How do I tell apart E, doubly degenerate, symmetry apart from T, triply degenerate, symmetry for a molecular orbital?
In point groups with three fold or higher axis of symmetry ($C_n$ where $n>2$) there is the possibility of degeneracy, in other words rotation about a horizontal axis and about a vertical one have ...
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Separation of sulfur dioxide and sulfur trioxide in the contact process
When gases leave the catalytic reactor The hot gas mixture is then passed through concentrated sulfuric acid , Sulfur trioxide readily reacts with concentrated sulfuric acid to form oleum but other ...
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Why is there a yellow solution formed upon reaction of silicon tetrachloride with water?
The yellow color is indeed due to an impurity. According to Wikipedia:
Silicon tetrachloride is prepared by the chlorination of various silicon compounds such as ferrosilicon, silicon carbide, or ...
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