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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1answer
315 views

What is 'equality' of chemical bonds?

Why are all the $\ce{C-O}$ bonds in $\ce{CO_3^2-}$ equal but not those in $\ce{H2CO3}$?
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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 ...
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1answer
150 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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1answer
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How to recrystallize boric acid into flakes?

I am putting 100 g of boric acid, 400 g 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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125 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
236 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
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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. We wanted to taste them to see whether they are salty are not. The ...
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1answer
154 views

How to efficiently reduce of ilmenite to pure titanium?

I am looking for a process in which reduces ilmenite to pure titanium with the highest yield possible. We are to use a process of our choice or one that we have created in conjunction with FactSage to ...
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1answer
643 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
65 views

A chemical compound with these conditions? [closed]

I am searching for a chemical compound which meets these five conditions: slightly soluble in water layered strutcture ionic conductor thermochromism lead must be a part of it.
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2answers
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Difference between baking soda and baking powder

I learnt that the chemical symbol for baking soda and baking powder is NaHCO3. However, when I do a simple experiment which is put vinegar into both substances. I can get different observations. ...
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3answers
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Does silicon dioxide react with alkalis?

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 not 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: $$\ce{...
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453 views

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 right, ...
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1answer
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Why does potassium permanganate turn colourless when reacted with sulfur dioxide?

I learnt at school that when sulfur dioxide gas, $\ce{SO2}$, is combined with potassium permanganate, $\ce{KMnO4}$, the purple solution will become colourless. What happens in the solution to cause ...
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1answer
145 views

Coloured compounds on reacting with oxygen

In the reaction of chlorine gas with water, Hydrogen chloride and nascent oxygen is produced.The reaction of any coloured substance with this nascent oxygen makes it colourless. Is it true?if yes, ...
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How can I balance the redox reaction of sulfur dioxide with oxygen?

How do I balance this reaction using half-redox equations? $$\ce{2SO2 + O2->2SO3}$$ My work is: Oxidation: $\ce{SO2 + H2O -> SO3 + 2e- + 2H+}$ Reduction: $\ce{H2O + 2e- + O2 -> SO3 + 2H+}$...
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2answers
11k views

What is the oxidation number of the oxygen in BaO2

According to the book for a binary compound, first we assign the element with greater electronegativity its oxidation number (oxygen always -2 except in peroxides). So, we have -2 x2 =-2. So, each ...
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1answer
5k views

What is the difference between organosilyl, alkoxysilane and silane compounds?

What is difference between organosilyl, alkoxysilane and silanes? How do these groups make a surface hydrophobic?
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1answer
177 views

General methods of Analysis for FTIR Results

What can we say about a molecule from the position and number of bands in FTIR spectrum. I know that the more symmetric a molecule is, the less number of bands it has. What else can we say, for ...
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0answers
204 views

Hexafluorosilicid acid attacks glass?

When HF meets glass, Hexafluorosilic acid is formed (assuming some water is present). It appears that Hexafluorosilic acid and further attack glass? How is this so, considering that all F atoms are "...
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0answers
340 views

Mechanism for reaction between aluminium and iodine [closed]

What should be a suitable mechanism for the reaction between aluminium and iodine, catalysed by water? In my initial approaches, I had first thought of repeated attacks of the lone pairs of oxygen in ...
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1answer
1k views

How do I isolate calcium from calcium carbonate?

I have the ability to use many kinds of reactions, and the use of most common acids/bases.
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1answer
594 views

Make a silver zinc battery

I have a shaver that runs off a rechargeable battery that is dying. Would it be feasible to make a silver zinc battery and use it to replace the existing battery? Cost is not an object, anything less ...
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what is the acceptable percentage for food grade ethanol?Is 95% ethanol plus 5% water consider as food grade ethanol?

Is 95% ethanol plus 5% water consider as food grade ethanol?
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0answers
488 views

How to predict the type of intrinsic defect? [closed]

Intrinsic defects occur when a pure material crystal shows either vacancy or interstitialcy. When an ionic compound has vacancy, the imbalance in charge has to be compensated with another defect. When ...
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1answer
584 views

Factors to consider to predict EPR

What are the factors to consider when predicting the EPR spectrum of $\ce{Cu(Ox)P(CH3)3}$ where $\ce{OX}$ is the oxalate ion? I understand that there are several factors to consider for EPR (Electron ...
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1answer
850 views

How does the radial distribution function of Vanadium differ from that of Calcium and how does this affect the ionic electron configurations?

When Vanadium is ionised it loses the 4s electron first, meaning that it's 3+ ion has a different electron configuration to Calcium despite it being isoelectronic. Can it be explained in terms of ...
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36 views

Using knowledge of radial distribution functions, how is it possible to explain the different electron configurations of V3+ and Calcium [duplicate]

I recognize that the 3d orbital decreases in energy to lower than the 4s once it becomes occupied (even if I don't completely understand why?!). However, how is the difference in electron ...
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1answer
419 views

Devitrification vs glass transition temperature

This graph comes from a so-called "differential thermal analysis". It is studying the effects of temperature on glass. I don't understand what the difference between "glass transition" and "...
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2answers
9k views

Why are all the orbitals that have the same principal number in Hydrogen degenerate?

In hydrogen, all orbitals with the same principal quantum number 'n' (1,2,3...) are degenerate, regardless of the orbital angular momentum quantum number'l' (0,1...n-1 or s,p,d..). However, in atoms ...
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1answer
101 views

Is there a heat capacity of an object when it is melting?

Is there a heat capacity of an object when it is melting? I’m questioning it since the temperature doesn’t change during phase transitions and the unit of heat capacity is joule per kelvin.
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1answer
48 views

Is atom-clean aluminum active enough to react with alkali salts?

Thermally evaportated $\ce{Al}$ under high vacuum is free of oxidized species and highly active. But is it active enough to even substitute the alkali cationic metal in alkali salts, like $\ce{LiOH, ...
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1answer
865 views

How effective is sulfur in detecting mercury vapors

I've read that powdered elemental sulfur will react to the presence of mercury vapor in the air creating red mercury sulfide, and that an open container of sulfur can be used as a means to verify ...
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2answers
7k views

Precautions and tips for Qualitative Inorganic Analysis of Coins

I'm a highschool student and as part of an investigatory project, I have decided to analyse which metals are present in our everyday coins. I chose this because in my previous academic year, I had ...
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1answer
394 views

Confusion with Law of Equivalence

Law of equivalence states that One equivalent of an element combines with one equivalent of the other. Equivalent of $\ce{Na}$ is $22.99$ and that of $\ce{O}$ is $8$. By the law of equivalence, $1$...
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1answer
278 views

Using solubility guidelines to predict a reaction of two ionic, water-soluble salts

Will a reaction occur in the following case? If so, write a net ionic equation for it: $\ce{(NH4)2SO4 (aq) + ZnCl2 (aq) -> ?}$ The book says that all possible combinations of positive and negative ...
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1answer
406 views

Are the rules proposed by slater for the calculation of Z effective right?

Today, I studied Slater's rules for calculating the effective nuclear charge. But, one particular line " The shielding power of the d and f orbital is lesser in comparison to the p and s orbitals" ...
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1answer
268 views

What is the molecular formula of the nitrate of a metal Q that forms a carbonate of the form QCO3?

A metal $\ce{Q}$ forms a carbonate and a nitrate. The molecular formula of the carbonate of $\ce{Q}$ is $\ce{QCO3}$. What is the molecular formula of the nitrate of $\ce{Q}$? The answer says it is $\...
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0answers
145 views

Finding the irreducible representation which an orbital transforms under [duplicate]

I have some major confusion on irreducible representations. An example of a problem I have is Based on the character table for the point group of each of the follwing molecules, which irreducible ...
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1answer
14k views

Cyanide ion non-bonding/lone pair?

Where's the lone pair on the cyanide anion in this MO diagram? In the traditional Lewis picture there are two lone pairs on the cyanide ion. In the MO diagram though there appear to be no non-...
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1answer
730 views

Enclathrated - definition?

When discussing the solvent uptake of a metal-organic framework would the correct term be "solvent molecules were enclathrated into the pores"? Despite searching for a definition online I have drawn a ...
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0answers
86 views

Is it dangerous to live near lead? [duplicate]

Several month ago, I soundproofed the door of my room with two sheets of lead. Can it be dangerous to live with them for many years? Can lead "decay" in some way and be inhaled? (and what happen when ...
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2answers
371 views

How to determine peroxy oxygen?

Which of the following compound doesn't contain peroxy oxygen? $\ce{CrO5}$ $\ce{Cr2O3}$ $\ce{Na2O2}$ $\ce{BaO2}$ I think peroxy oxygen is peroxide, am I right?. I have read in this ...
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1answer
299 views

What are the product(s) of red phosphorous when burned?

A match box lighter strip typically consists of powdered glass and red phosphorous. When this part is burned, it's residue is like a sticky dust that, when applying friction, will release smoke or ...
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0answers
94 views

Does copper react with hydrochloric acid? [duplicate]

In my chemistry lab, we had 18 different reactions involving many different substances. One of the experiments involved placing a piece of copper metal in hydrochloric acid. While observing it for a ...
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2answers
285 views

Can I make Cobalt Violet with these materials?

I'm given $\ce{CoCl2*6H2O}$ as well as $\ce{Na3PO4*12 H2O}$ The chemical formula for Cobalt Violet is $\ce{Co3(PO4)2}$. I haven't done stoichiometry in a long time but I think that's creatable, right?...
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1answer
114 views

How to recover 15g gold from 50 gallons of 30% Acid?

Someone mistakenly poured a solution containing $15\mathrm{g}$ of gold into a nearly full waste drum that is around $30$% $\ce{HCl}$ with a little nitric acid in there as well. Is there a safe way ...
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1answer
2k views

Is there a compound that binds with salt (NaCl) in solution? [closed]

Is there a non-toxic compound that binds with $\ce{NaCl}$ in a water medium?
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7answers
24k views

Is dehydrating copper(II) sulphate pentahydrate a chemical or physical change?

Is removing the waters of hydration from $\ce{CuSO4 * 5H2O}$ a chemical or physical change? Sorry for the trivial question. I get varying answers across the net.

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