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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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Molecular orbital diagram for terminal metal-oxo complex with dative bonds

I am interested in terminal metal-oxo complexes and their electronic structure, specifically those with coordination numbers of 6, including the oxo ligand. I know that Fe(IV)-oxo complexes tend to ...
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169 views

Why is antimony pentafluoride a stronger Lewis acid than phosphorus pentafluoride or arsenic pentafluoride?

How can these relative reactivities as a Lewis acids be rationalized: $$\ce{SbF5 > AsF5 > PF5}$$ One simple argument could be the size of the $\ce{Sb}$-center: Because it is bigger than for ...
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1answer
627 views

Comparing Acidic Strength of H3PO4 and H3AsO4

The $pKa$ values for H3AsO4 and H3PO4 are $2.30$ and $2.12$ which indicate that H3PO4 is a stronger acid compared to H3AsO4. I looked up their electronegativity values to find that they are almost the ...
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1answer
846 views

Is there a compound that contains water as a subcomponent? [closed]

Is there a molecule that contains water chemically bonded to another molecule/element? Could someone provide an example or two?
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105 views

Order of lewis acidity for BBr3, BCl3, BMe3, BH3, BPh3?

In case of $\ce{BCl_3}$ vs $\ce{BH3}$, which one is the controlling factor? 1) Is it p-pi p-pi interaction in $\ce{BCl_3}$ that makes it weaker than $\ce{BH3}$? 2) Or is it the -I effect of $\ce{Cl}...
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1answer
561 views

Bond dissociation energy order for C-C,N-N,O-O & F-F single bond

I couldn't understand the trend of bond dissociation energy of various single bonds. Why C-C>N-N>F-F>O-O. I had mugged up the trend the now, and according to me BDE should continuously increasing ...
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1answer
214 views

Is there any difference between negative electron gain enthalpy and electron affinity?

According to electron affinity,it is the amount of energy "released" during the addition of an electron in the valence shell of an isolated gaseous atom, and its sign convention is opposite to that of ...
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1answer
144 views

Do milk and orange juice contain H2O molecules?

I'm asking as there is this woman who claims she's severely allergic to (you guessed it) water (H2O molecules). She says just a drop of water in her mouth sends her into anaphylactic shock and only ...
7
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1answer
108 views

Non-conventional polymers

IUPAC defines a monomer as, A molecule which can undergo polymerisation thereby contributing constitutional units to the essential structure of a macromolecule. Bearing this in mind, I thought ...
7
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1answer
500 views

How long does it take for nitric oxide to turn into dinitrogen and dioxygen?

I'm new to chemistry and am studying nitric oxide as a combustion accelerant. Nitric oxide is said to be a free radical. People say that nitric oxide, by itself, is pretty stable. But I saw that $$\...
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4answers
114 views

A simple equilibrium problem

Take the following simple equilibrium: $$\ce{CH3COOH + H2O <=> H3O+ + CH3COO-}$$ Ethanoic acid will act as a typical Brønsted-Lowry acid and donate a proton to water, forming a conjugate acid-...
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176 views

Mechanism of sodium hypochlorite and hydrochloric acid

The overall reaction for the reaction between NaClO and HCl is: $\ce{NaClO + 2HCl -> NaCl + Cl2 + H2O}$ To try and understand how this reaction occurs, I've thought of a simple mechanism for it. ...
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2answers
63 views

Specifically how dangerous is a 10g chemical sample of pure arsenic and how do you properly dispose of it?

I'm not a chemist. I'm an electrical engineering student and I recently purchased an element collection. The collection came with a 10g arsenic sample. I assumed it wasn't much of a thing because ...
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31 views

Comparison of Ionic Character

I read somewhere that in d block compounds, higher the oxidation state, higher is the tendency to form covalent bonds. Which also implies that the element will form the most ionic compounds in it's ...
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63 views

Why does lithium aluminium hydride appear grey?

Commercial lithium aluminium hydride is a grey compound, which loses a lot of reactivity the darker it is. Luckily you can clean it up to get the reactive white compound and the separated grey ...
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45 views

Why Chlorine has the highest electron affinity? [duplicate]

Since electron affinity is inversely proportional to the size of the atom, then why Chlorine has the highest electron affinity in the periodic table?
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0answers
29 views

Effect of Electronegativity on Bond Angles in NH3 and NF3 [duplicate]

I am reading a book: Concise Inorganic Chemistry by J.D.Lee (Fifth Edition) In the chapter-The Covalent Bond, the author says: $\ce{NF3}$ and $\ce{NH3}$ both have structures based on a tetrahedron ...
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1answer
77 views

Separating specific components of a PUREX raffinate

The PUREX extraction in nuclear fuel reprocessing leaves behind a nitric acid raffinate full of (mainly) 'fission products', which are a diverse set of elements produced by fission in a nuclear ...
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16 views

EQPt pH of a Monoprotic Acid-Base Titration: Product of Molarites Over Their Sum

Context The Henderson-Hasselbalch equation is as follows. $$pH=-\log\big(K_a\big)+\log\bigg(\frac{[A^-]}{[HA]}\bigg)$$ One may follow its derivation in order to understand how it came to be, yet ...
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1answer
70 views

Why potassium chromate can be used as indicator in Mohr method?

Both silver chloride and silver chromate are insoluble, so why is that silver chromate is precipitated before silver chromate? Why wouldn't both red silver chromate and white silver chloride form at ...
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1answer
26 views

Difference in bonding between water and hydroxides [duplicate]

As we know, water is a covalently bonded molecule. However, the hydroxides - such as sodium hydroxide - are ionic compounds. Both of these are similar, although the difference between both is a sodium ...
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1answer
169 views

After boiling water in an electric kettle, should I empty it?

(I'm reposting my question from Physics SE where it got closed for being off-topic, but chat tells me that it might be on topic here.) In the office I'm working in, there's an electric kettle for ...
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1answer
75 views

What is the correct reaction of sulfur dioxide with chlorine?

I'm confused in reaction of $\ce{SO2}$ with $\ce{Cl2}$. Some source states the given reaction (1), while others state the reaction (2): $$\begin{align} \ce{SO2 + Cl2 &-> SOCl2 + Cl2O \tag{1}}\\...
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66 views

Reaction between Ag2O and PCC

What type of reaction might take place or what product might be produced when silver(I) oxide stays in close proximity with pyridinium chlorochromate at 70 degrees C for a very long period of time, ...
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2answers
49 views

Is there a piece of software that can help me see the (hkl) planes in a crystal lattice?

I am doing research with calcium carbonate structures. I need a way in which I can familiarize myself with the lattice structure of calcium carbonate polymorphs, especially calcite. I really struggle ...
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1answer
92 views

Why doesn't graphite dissolve in organic solvent?

The graphene layers are held by weak van der Waals' force, this should be comparable to the force holding solvent particles. Why doesn't graphite dissolve in organic solvent and separate into graphene ...
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1answer
33 views

Anyone know if this kind of Polyethylene is safe to use? [closed]

I'm planning to make a weighted blanket and I've looked around the internet and most people use poly pellets or glass beads for the weight. Glass beads is kinda hard to find in where I live, so I ...
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2answers
234 views

Obtaining calcium iodide from calcium and iodine

According to: https://www.webelements.com/calcium/chemistry.html Calcium reacts with iodine upon heating as follows: $\text{Ca}_{\,(s)} + \text{I}_{2\,(g)} \to \text{CaI}_{2\,(s)}$ I am ...
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1answer
399 views

What are those… crystals?

I have been trying to make muratic acid from salt and phosphoric acid (didn't know that it's made at 150 °C). After waiting a few days, a third of the time it was sealed by placing a container over it,...
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1answer
45 views

Why don't such ions form if half-filled or full-filled configurations are considered stable?

We all know atoms want to stabilize by having an octet or duplet configuration. But if you see nitrogen which has an electron configuration of $\ce{2p^3}$. It has half filled p orbital, so it is ...
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0answers
420 views

Citric acid rust removal and neutralization

I'm currently removing rust from steel with citric acid dissolved in water. I generally use a wire brush as the final treatment to remove any surface rust that the acid loosened up. The pieces under ...
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1answer
414 views

Group 15… Lewis Acid, Lewis Base or Not At All?

I am a long-time reader of this forum, but this is my first time post. I am a chemistry undergrad with a question about Lewis acidity or basicity of Group 15 compounds. I know Lewis acids act as an ...
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0answers
104 views

What is this golden looking substance?

I am currently messing around with gallium compromising aluminum. I am using a titalium lock which is just a brand of aluminum padlock and I put a gallium-indium euctic alloy on the surface of it. It’...
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0answers
27 views

Formation of double bonds [duplicate]

I know that in $\ce{SO2Cl2}$ the S atom undergoes $sp^3$ hybridization. How, then, are the double bonds of the oxygen atoms formed?
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0answers
28 views

Black & Green Nickel Oxide-Supplemental

A previous question (April 2017) asked about black $\ce{NiO}$ did not supply any answer. Sadly, such a referral only deters colleagues from commenting on the current question. There is a great deal ...
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1answer
64 views

What type of bond would be formed if dyz orbitals overlap along the z axis? [duplicate]

I know that when two $\ce{p_z}$ orbitals overlap in a particular direction - along the z axis - they form a sigma bond. Now, if two $\ce{d_{yz}}$ orbitals overlap in same direction, which type of ...
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1answer
48 views

Making sulfate from elemental sulfur [closed]

I have $\approx\pu{2 g}$ of elemental sulfur that I need to convert to dissolved sulfate in DI water. What's the easiest lab chemistry that will get me there?
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106 views

If Ti(NO3)4 is dissolved in water, what would be the change of pH?

Does this compound exist in nature. I would suppose the salt would dissolve in it's ions (Nitrate and $\ce{Ti+}$). Wouldn't the nitrate react with the hydrogen in the water and give us a acid? And ...
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89 views

Why AlCl3 more acidic than FeBr3?

In compounds with lone pairs or with charge it is easy to predict acidity of compounds but how to describe acidic nature of such ($\ce{FeBr3}$, $\ce{AlCl3}$) transition element compounds ?
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38 views

Black & Green Nickel Oxide

At college I was told that nickel (II) oxide, normally green, can appear to be black, because of contamination by minute quantities of nickel (III) oxide. Recently, on the net, read that there is a ...
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61 views

What is the blue ppt I got from reacting sodium bicarbonate with copper II sulfate?

I planned to synthesise basic copper carbonate but instead obtained a blue ppt. The steps in this synthesis were to pour aqueous sodium bicarbonate into heated aqueous copper II sulfate with constant ...
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1answer
42 views

Is it possible to calculate the Kc for an irreversible reaction? [closed]

Is it possible to calculate the Kc for an irreversible reaction? For instance, can we Calculate the $K_c$ for: $$\ce{NaCl + AgNO3 -> NaNO3 + AgCl}$$
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1answer
284 views

Considering the d-d transition how, does tetracyanidonickelate(II) ion exist as a colored complex?

As I refer on google, the resources indicated that, the d block elements which have unpaired electrons as in their ions, when they are making complexes with ligands, they can absorb different ...
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1answer
672 views

What is the effect of oxygen in welding?

Welders use a shielding gas to avoid oxygen interact with the electrode. I supposed is might be because of ferric oxide formation as the electrode is steel-made. But fusion temperature of ferric oxide ...
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0answers
21 views

Why galvanic corrosion by sulphuric acid has a whitish appearance?

This is a picture of pearlitic cast iron engine liner which was corroded from the presence of sulphuric acid on the combustion products. What is the cause of the whitish appearance?
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1answer
1k views

Why does oxygen have less negative electron gain enthalpy than sulphur? [duplicate]

Oxygen has less negative electron gain enthalpy than sulphur. This statement is given in my book with a short reason: due to compact size of oxygen I'm unable to understand why. I would ...
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1answer
41 views

Oxidation of glucose

By oxidation of 9 g of glucose it is released 150 kJ of heat. Calculate the standard enthalpy of derivation of glucose (in kJ/mol), if the given enthalpies of the reactants are ΔfH (H2O(l)) = -285,8 ...
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1answer
82 views

Maximum possible hypochlorite concentration from electrolysis?

For reference, "electrochlorination" is just the electrolysis of a simple solution of water and table salt (NaCl) followed by reintroducing the chlorine gas produced. But, the Wikipedia article on "...
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1answer
61 views

Chemical equilibrium constant problem

In a equilibrium reaction $\ce{CO {(g)} + H2O {(g)} <=> CO2 {(g)} + H2 {(g)}}$, initial concentrations of $\ce{CO}$ and H2O are equal and are 0.3 mol/dm3. What is the equilibrium constant of ...
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1answer
61 views

Terminology for describing nuclei participating in metallic bonds

I've read many times that in metals (for example sodium metal), what constitutes the crystal lattice is an arrange of atoms, since no electron is given or lost, they are just shared between all the ...