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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Glass resistance to temperature

In my work on modifying glass surface, I need to rise the temperature to about 500°C. Does it have any effects on glass structure?
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479 views

Why is sand, sand; and why is glass, glass; While both mainly contain Silicon Dioxide?

I know that there is the famous process of heating material and converting them to glass; but what I don't know is, what is the chemical process of the creation of glass? Is it crystallization? How ...
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30 views

Which is the most basic oxide among group oxides? [closed]

How to determine the order of increasing basic nature for oxides and hydrides of any group? Is there any trend along the group?
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3answers
290 views

Is there a simple and inexpensive way to generate nitrogen gas?

It's fairly easy to generate a significant yield of hydrogen gas simply by reacting zinc metal with $\ce{HCl}$ or aluminum with $\ce{NaOH}$ solution. But is there a simple and inexpensive chemical ...
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0answers
7 views

What distinguishes a Lewis Complex from an Adduct or are they synonymous?

I cannot think of a distinction - the terms seem to be used interchangeably when talking about products of Lewis acid-base reactions. However, I am concerned that I may have overlooked a subtlety. ...
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18 views

Chemical Thermodynamics

In this pic, you can see the report for lab work. I did the labwork, and it is asking -to find delta H pr -? -delta H (theor)-? -error ? Please help me to find those
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22 views

Why is Cu2HgI4 filtered while it is hot?

Why is it required that the solution of copper (I) tetraiodomercurate (II), which has a thermochromic property, be filtered while it is hot?
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2answers
58 views

Why does N2 react with O2 to Form NO at high temperatures?

This also raises questions that I have about the Haber Process which produces ammonia ($\ce{NH3}$) from molecular nitrogen ($\ce{N2}$) and hydrogen ($\ce{H2}$). I have heard multiple times that bond ...
2
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1answer
26 views

Identifying Compound from the given information

A white solid is either $\ce{Na2O}$ or $\ce{Na2O2}$. A piece of red litmus paper turns white when it is dipped into a freshly made aqueous solution of white solid. Identify the ...
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1answer
28 views

Why doesn't Boron form Diborane with water?

Why is it that Boron does not form Diborane with water rather than $\ce{B2O3}$?
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1answer
21 views

Etching around corners

In etching of mono silicon, why does the etching process around the corners differ from the etching process around the flat edges? What brings about this difference and is there some way that MEMS ...
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1answer
24 views

The toxicity of carbon monoxide in terms of its interaction with haemoglobin

On the basis of its interaction with haemoglobin, explain the toxicity of carbon monoxide. I understand that ligand substitution is involved and carboxyhaemoglobin is formed meaning that the haem ...
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1answer
40 views

Tin (IV) iodide

In the reaction of tin(IV)iodide in acetone and water, the solution turns a urine yellow. Is this simply due to the hydrolysis of tin (IV) iodide: $$\ce{SnI4 + 2H2O -> SnO2 + 4HI}$$ why is the ...
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15 views

Where does the energy in the exothermic reaction of CaCl2 with water come from?

Today I created $1~\mathrm{M}$ aqueous solution of $\ce{CaCl2}$ and realized that the water before the mixture had a temperature of 23.4 Celsius degrees. Then I added the $\ce{CaCl2}$ and the ...
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1answer
24 views

Determine which orbitals will form hybrids with one another

I've been teaching myself chemistry, so any help is greatly appreciated. I've been reading an online tutorial that claims the two orbitals that merge in Aluminum trihydride are 1 orbital of 2s and 2 ...
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2answers
26 views

Thermochemistry problems?

Question 1: A compound A reacts according to the following hypothetical equation and has a molecular weight of 48.36 g/mol. 3 A (s) +B (aq) ––> 2 C (aq) ∆H° = ? A sample of A, weighing 0.152 g ...
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1answer
50 views

Coordination numbers of ionic and intermetallic compunds

If $\ce{NaCl}$ crystallizes in an fcc lattice, its coordination number should be 12. Then why do we say that $\ce{NaCl}$ has a coordination number of 6? Also, if $\ce{CsCl}$ crystallizes in a simple ...
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1answer
16 views

Reducing agent in preparation of CpRuCl(PPh3)2

Synthesis of cyclopentadienyl-bis-triphenylphosphine-ruthenium chloride $\ce{RuCl(PPh3)2(\eta^5-C5H5)})$: Dissolved $\ce{PPh3}$, $\ce{RuCl.3H2O}$ and cyclopentadiene in ethanol and heated under ...
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1answer
55 views

Phase diagrams (weird region)

On the left, there is a region for $\ce{MgO(ss)}$. I've been told such regions exist because stuff are not miscible. However, does that mean the composition axis on the bottom is a lie? Namely, ...
2
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2answers
39 views

Sunscreen or sunblock

When I went to the supermarket, I noticed that some of the product say sunscreen and some of them say sunblock. My question split into two part. 1) What are the different chemical substances use in ...
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1answer
33 views

Do we need to standardize 10M of NaOH?

I made $10~\mathrm{M}$ of $\ce{NaOH}$ solution by diluting $40~\mathrm{g}$ of its pellets in distilled water. I'm not sure if it's really $10~\mathrm{M}$ or at least close enough, but I don't think ...
2
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1answer
60 views

Why is the +3 oxidation state of Cerium more stable than +4?

For the 4f inner transition metals, +3 is the most common oxidation state (OS). Why is the +3 OS of cerium considered more stable than +4, at which it attains noble gas configuration?
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1answer
34 views

Where can I find the infrared band positions for phosphorus compounds?

I am trying to interpret an IR spectrum where I have $\ce{(NPCl2)3}$ I have $\ce{P-N}$, $\ce{P=N}$ and $\ce{P-Cl}$ bonds and it is cyclic. Where can I find or does anyone know what the general ...
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1answer
35 views

What is the role of POCl3 in this reaction?

I did a reaction to form $\ce{(NPCL2)3}$ The reagents I used were: Phosphorus Pentachloride $\ce{PCl5}$ ammonium chloride $\ce{NH4Cl}$ Chlorobenzene - the solvent Phosphorus oxychloride $\ce{POCl3}$ ...
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1answer
37 views

What happens in reaction of Lead and concentrated Nitric Acid?

I have two oppsing information, one that it forms a protective layer of $\ce{PbO}$ and doesn't reacts,other that it forms lead nitrate.Can someone clarify. NB the acid is cc.
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1answer
16 views

A dehydrating agent acting as an hydrating agent?

We know that $\ce{P4O10}$ is a dehydrating reagent and I might list on 100's of reaction of it's dehydrating nature, mainly orgainc elimination reaction and few inorganic oxoacid dehydrations, but it ...
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20 views

Missing reaction mechanism link?

The following reaction scheme can be easily explained by the help of mechanisms but one link is missing, so I wish if someone would help by proposing one or by providing an already proposed ...
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1answer
67 views

Why don't unstable odd electron species dimerize so that they become stable?

Why doesn't unstable odd electron compound $\ce{NO}$ dimerize to $\ce{N2O4}$? Why doesn't this structure of ozonide dimerize? But why then does $\ce{BH3}$ dimerizes to $\ce{B2H6}$, and $\ce{AlCl3}$ to ...
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1answer
13 views

Controversy over products of iodate and bisulfite?

We know that when we are trying to recognize iodate, we use sodium bisulphite to the solution and with the help of starch paper recognize the evolved $\ce{I2}$.But when I studied the books I found ...
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1answer
42 views

What is the structure of Cl₂O₆?

I couldn't find which of these is correct and even someone I asked said there's no general covincement on it, but I'm unsure whether he's correct? I reproduced the second structure a little wrong ...
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1answer
39 views

Irony? Sulphur, Is +6 really the stablest form?

I think everyone might be aware that +6 is considered the stablest form of sulphur.But I think why this reaction happens very slowly and at such a high temperature and even the help of a catalyst is ...
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1answer
31 views

Elasticity of latex

Latex is a natural resources and the elasticity can be increased by heating it with sulphur. My question is why they are different elasticity of latex? I mean like rubber gloves have a good elasticity ...
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Is hydrated calcium silicate a good anticaking agent?

I work in a salt production factory and I want to make a purchase for hydrated calcium silicate as an anticaking agent for salt. Is it a good anticaking agent for salt and what is the perfect ...
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Density of Ni vs Cu using unit cell

How might one determine whether Ni is more dense than Cu using only the atomic masses of Ni and Cu, and the fact that Ni has a simple cubic unit cell, and Cu has a face-centered unit cell. You are not ...
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17 views

Thermal stability of barium peroxide and barium oxide

why is barium peroxide more thermally unstable than barium monoxide Do I answer it based on the bonding and structure?
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1answer
45 views

stone which turns to black on exposing to atmosphere?

My mom is using a stone like substance as a dye for hair recommended by a herbalist. That stone becomes black when exposed to air. Do you know which compound is this?
2
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1answer
31 views

Why are square planar coordination compounds with four different ligands optically inactive?

Why square planar co- ordination compounds of type Mabcd do not show optical activity, although they contain 4 different ligands ( i.e. chiral central metal atom)
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Why are only ozonides of heavier elements stable?

Most ozonides which are stable are of Cs, Rb, K but not of Na, Li. Why? Why they have no mention often?
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1answer
38 views

How to obtain a certain mass of lead (II) iodide from lead (II) nitrate? [closed]

I need to get 2 grams of lead (II) iodide precipitate but I don't know how much lead (II) nitrate and potassium iodide I need to get that result. The balanced chemical equation is: $$\ce{Pb(NO3)2 + ...
2
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2answers
57 views

Does dissociation require energy to occur?

I assume spontaneous separation to ions of salt solution (or acid) requires energy to occur, right? Where does that energy come from? Is it from the heat of the solution? Now, if someone devised a ...
3
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1answer
43 views

Why did HF disolve this lightbulb at the surface rather than more submerged points?

I watched this video where a lightbulb is suspended in a solution of HF. The result is that the HF dissolves the glass, but it seems like the part of glass on the surface reacted faster than fully ...
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0answers
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How to recrystallize boric acid into flakes?

I am putting 100g of boric acid, 400g of water and trying to crystallize at low temperature and letting cool slowly, however it recrystallizes as needle like texture. I need soft large crystals like ...
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0answers
26 views

What happens when adding swimming pool salt to a freshwater pool?

Why does adding swimming pool salt to a freshwater swimming pool cause a white sediment to build up and stick to the floor of the pool?
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1answer
38 views

Which group does germanium belong to?

$\mathrm{Z= 32}$ $\mathrm{1s^2\ 2s^2p^6\ 3s^2p^6d^{10}\ 4s^2p^2}$ According to me it belongs the $\mathrm{IV\ B}$ group since it has the $\mathrm{d}$ completed, but it belongs to $\mathrm{IV\ A}$. ...
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6answers
7k views

Do all salts taste salty?

Recently, I am learning the production of soluble and insoluble salts. My friend and I have done this experiment at the school lab. However, we want to taste them to see whether they are salty are ...
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1answer
33 views

How is the crystal direction important for etching silicon surfaces?

I am a student of masters study with a background only in electrical engineering, but I have studied Miller indices and crystallographic planes and directions, personally, to help myself understand ...
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1answer
37 views

A chemical compound with these conditions?

I am searching for a chemical compound wich meets these five conditions! slightly soluble in water layered strutcture ionic conductor thermochromism lead must be a part of it. I hope someone can ...
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2answers
47 views

Do silicon dioxide react with alkaline?

In my science class, I have been taught that silica (silicon dioxide/sand) has three properties, namely It does not react with water. It does not decompose with heat. It does react with acid. ...
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Balancing Ionic and Net Ionic equations

I am currently taking a chemistry course about acids and bases. One of the things I am a bit confused about, is the acid and base neutralization reaction, and how to balance it. For Example: ...
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How to determine an unknown gas in a tube with a massless piston at equilibrium conditions?

There is a massless piston that can move freely in a horizontal tube that is closed at both ends. To the left, there is a sample of helium gas at $300~\mathrm{K}$ and $4~\mathrm{atm}$. To the ...