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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Ionic Compounds

I need help on my Chemistry homework, here's the question. Copper and Zinc are next to each other on the periodic table. When Copper and Bromine are combined, two different ionic compounds form. When ...
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Why do we add copper when testing a salt for nitrate ion?

In our chemistry curriculum we are doing these lab experiments where we are supposed to test salts for certain anions,cations and other stuff. I was told that if I dissolved the salt in concentrated ...
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34 views

How actually do we decide acidity and basicity order?

In a book, I read two quite contradictory statements.: $\ce{HIO > HBrO > HClO}$ wrt acidity while $\ce{HF > HCl > HBr}$. Aren't they contradictory? If not can anyone please ...
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1answer
33 views

Why is Cr²⁺ is a good reducing agent but Mn³⁺ is a good oxidising agent?

The question is the same as the title states. In my text book,the following is written $\ce{Cr^{2+}}$ gets converted to $\ce{Cr^{3+}}$ as the +3 oxidation state hase half filled $\mathrm{t_2g}$ ...
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2answers
52 views

Why would this reaction occur? Won't it be unfavourable? [duplicate]

I was just reading about how Nitrogen and Oxygen combine to form Nitric oxide. My question is, why would this reaction even occur? Isn't the valency of Nitrogen 3- and Oxygen 2-, and therefore this ...
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1answer
48 views

Ksp of calcium hydroxide

What would the Ksp of calcium hydroxide be at around room temp (66 Fahrenheit) and 1 atm of pressure? I know the Ksp value varies with temperature, but is there a notable difference from 20 degrees C ...
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1answer
30 views

Finding molarities of individual reagents given the chemical equation and total concentration in a container

I am given a table that gives me the different total pressures at certain times. The decomposition of phosphine is the reaction: $$\ce{4 PH3(g) <=> P4(g) + 6 H2(g)}$$ The time/pressure ...
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11 views

Chemistry of sodium dihydrogen phosphate [on hold]

How much sodium dihydrogen phosphate/monobasic sodium phosphate $\ce{Na2HPO4.3H2O}$ needs to be added to 1 litre of pH 9.5 water to lower the pH to 8.5?
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2answers
29 views

condensation of tellurium on inside of ampoule?

After heating an ampoule of tellurium around its melting point in a furnace for about a day, I've noticed drops of the element on the upper inside surface of the ampoule, as if it condensed there. ...
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Why is snow white?

I know that this is a rather ambiguous question; but my question is, whenever we take water and freeze it in the freezer, it still tends to stay clear. Since snow is just frozen water, why is it ...
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1answer
29 views

Henderson Hasselbach Equation

So will the hasselbach equation be able to calculate the pH when you have an acidic solution and you add a basic solution? Will that be possible or should you must add only add an acid to calculate ...
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1answer
38 views

Aluminum deoxidation gas

I am new to chemistry. I am looking for a gas that would de-oxidise aluminium. Which gases would work for that and at what temperature? Details: I need to sinter aluminium powder. But because the ...
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1answer
44 views

Could PNP (Silicon) transistor be toxic when exposed to air\light?

The story goes as follow: While I was in the electronic room I got bored and crushed a PNP transistor (Model CDIL 2N2907) using a rotating pipe jaws just like in the picture bellow. Now, it took me ...
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0answers
19 views

How do you calculate a unit cell's dimensions from an XRD spectra?

My Inorganic lab had us do an XRD measurement, but I've never been explained how to interpret the data. Question Calculate the unit cell dimensions a,b, and c, for $\ce{YBa2Cu3O7}$ from the ...
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1answer
19 views

Salt analysis: Position of lead ion

Why is $\ce{Pb^2+}$ present both in Group I and II of the basic radicals? Is it related to the solubity product of its salts?
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1answer
44 views

What is the chemical composition of the grignard reagent?

What is the actual chemical composition of the grignard reagent and what is the method of preparation? Can it be prepared in college laboratories?
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1answer
52 views

Safe yet strong exothermic reaction?

I'm studying chemical engineering at uni (Belgium), and this year (my 2nd) we have to develop and build a stirling engine. It has to be powered by a relatively safe exothermic reaction (not dangerous ...
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0answers
17 views

What's the reason for the static cling of alkaline earth metal pieces?

I've noticed when dealing with small strontium pieces in air (~1-10mg pieces, I think) that they seem to get charged and tend to jump around a lot when you're trying to move them from a polyethylene ...
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1answer
87 views

What is the actual reason behind PCl₅ existing as an ionic solid?

Why does $\ce{PCl_5}$ exists in the solid state as $\ce{[PCl_6]^{-}[PCl_4]^{+}}$? What is the problem with it that it doesn't exist in its original form in solid state? Like why isn't it just ...
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1answer
24 views

Basicity of Group 15 hydrides [duplicate]

Why does the basicity of Group 16 hydrides ($\ce{NH_3,~ PH_3,~ etc}$) decrease down the group ? I know that its Lewis Base nature due to the lone pair but wouldnt the more EN element be less ...
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2answers
106 views

Is s-p mixing referring to hybridization or is it the mixing of one atoms s orbital with the other's p orbital?

According to molecular orbital theory s and p orbitals can mix if they are close enough in energy to each other. For period 2 diatomics, this occurs for $\ce{Li, ~Be, ~B,~ C}$ and $\ce{N}$ - in the ...
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1answer
44 views

How to calculate the oxidation state and the number of equivalents oxidized with YBa₂Cu₃O₇

I've hit some trouble with these calculations and need help sorting out confusion. In the lab we synthesized $\ce{YBa2Cu3O7}$, per the lab manual $\ce{Y, Ba, O}$ have the usual charges of +3, +2, and ...
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1answer
45 views

Why do people assume 28 oxygens in chlorite mineral formula?

I have been trying to calculate chlorite mineral formulas from microprobe data. However, all of the mineral formula spreadsheets on the internet, including those from the Open University assume 28 ...
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1answer
62 views

In molecular orbital theory, why does s-p mixing in the dinitrogen molecule not effect the 1σᵤ orbital?

s-p mixing in $\ce{N2}$ causes the $1\sigma _g$ orbital to decrease in energy, the $2 \sigma _g$ orbital to increase in energy (to higher than the $1 \pi _u$) yet the $1 \sigma _u$ is left unchanged ...
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1answer
26 views

Why do electrons not get paired up in [Fe(H2O)5NO]2+?

The magnetic moment of [Fe(H2O)5NO]2+ is 3.87 Bohr magneton, which implies there are 3 unpaired electrons. Since iron is in +1 oxidation state (due to charge transfer with nitrosyl group), it's ...
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pKa vs range in choice of an indicator

When choosing the ideal indicator during a titration, there are two considerations to keep in mind: The pH = pKa of the equivalence point The indicator has a small range (<±1) over which it can ...
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1answer
28 views

Trihalide of Nitrogen

Which is the least stable trihlide of nitrogen and why ? I have two conflicting theories , one is that Fluorine-fluorine electron repulsion will make NF3 least stable and another is steric reasons of ...
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1answer
40 views

Exsistence of the compound KFO3

As the compound Potassium perchlorate exists , is there something as $\ce{KFO3}$ ? All the other perhaltes are mentioned somewhere on the web but what about this ? If no , then why?
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1answer
116 views

What does delta letter mean in some ceramics chemical material formula?

Here is a given chemical formula for ceramic material: La0.6Sr0.4Fe0.8Ni0.2O3-δ There is a letter δ. What does it stand for? I guess it is something about oxygen vacancies in crystal lattice.
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1answer
43 views

What does Pb(NO₃)₂ + KI form?

What do $\ce{Pb(NO3)2 + KI}$ form together?
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1answer
22 views

Is it possible to separate out (MgxCu1-x)2(CO3)(OH)2 into simply (MgxCu1-x)(CO3)?

Good afternoon, Here is the problem I am stuck with, in particular just the first part of it. I have calculated the moles (4.492 x 10-3 mol) and I am quizzed with regards to the equation that occurs. ...
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1answer
27 views

Carbonate + acid reactions - How to recognize these type of reactions?

So I've got $$\ce{CaCO_3 + HCl \rightarrow CO_2 + H_2 O + CaCl_2}$$ I'm wondering how I can recognize these types of reactions? I know that when I mix an acid and a base I get salt and water but in ...
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2answers
88 views

Fluorine reacts with Ammonia

What are the products of the reaction between fluorine and ammonia ? Is it the same as with chlorine and ammonia , which depend upon which reactant is taken in excess ?
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1answer
28 views

How to convert sodium aluminate back to sodium hydroxide?

I had dissolved a bunch of aluminium foil in an aqeous solution of sodium hydroxide. The resulting solution consists mainly of sodium aluminate with very little excess sodium hydroxide. What I want to ...
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0answers
17 views

Interpreting X-ray diffraction data

So I've got my data for some x-ray crystals of small molecules of Ag, Cu,... I was curios to know what the best way to determine what type of lattice each of these atoms may have?
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1answer
47 views

Why is Ag+ a soft acid?

A soft species is typically large, polarizable and has a low charge (magnitude). The silver cation is not highly charged (this supports softness) however, it is anomalously small due to high nuclear ...
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2answers
30 views

Rate constant and Michaelis Menten

Please consider the following figure of a concentration over time (msec) diagram with variables for an enzyme, a substrate bound enzyme and a product. Recall that $\ce{E + S \leftrightharpoons ES ...
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2answers
83 views

Can artificial sea water be prepared by mixing sea salt with water?

I am looking for ways to easily prepare artificial sea water. The chemical composition doesn't have to exactly match that of natural sea water. On-line I can find recipes to prepare sea water. But I ...
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1answer
30 views

MO scheme for coordination complexes (tetrahedral) - Heteroligand vs. homoligand

How is the MO diagram drawn for a tetrahedral complex with heteroligands (e.g. $\ce{[NiCl2(PPh3)2]}$) different from a tetrahedral complex with the same type of ligand? Do we consider the same "a1 and ...
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63 views

Why is copper (II) coordination number so big?

Consider tetraaminecopper (II) ion. $\ce{[Cu(NH3)4]++}$ or $\ce{[Cu(NH3)4(H2O)2]++}$ Copper (II) ion has electron configuration $\ce{[Ar] 3d^9}$. How do the 4 electron pairs from ammonia atoms form ...
2
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0answers
39 views

What are examples of group 14 elements forming dπ - pπ bonding?

While studying the Group 14 elements, I came across the anomalous behaviour of carbon. In that there was a point: Carbon forms only p$\pi$-p$\pi$ type bonding while other elements in the group ...
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1answer
32 views

LiAlH4 / H2O reaction energy

I'm dealing with a free-energy scam on another forum. It is well-known that $\ce{LiAlH4}$ reacts explosively with water. My chemistry days are long behind me, so I thought I'd come here to ask: ...
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14 views

How do I obtain PDF/ICDD/JCPDS?

I'm having trouble finding JCPDS of a material. I'm specifically looking for Na-titanate.
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1answer
36 views

Why is electronegativity increasing with oxidation state increase?

I may be a rudimentary fact or something really "not-that-hard-to-figure-out", but In inorganic chemistry it is common to consider a single value of the electronegativity to be valid for most ...
4
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2answers
178 views

Why does SnCl2 occur despite the octet rule?

Shouldn't reaching an octet be any atom's "goal"? However, I've recently learned about cases that are either expanding octets, or have lesser than "enough" electrons for an octet abiding. e.g.: S in ...
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1answer
33 views

In ionic solids such as NaCl, do the cations fill interstital holes in the cation's cubic close pack structure? [duplicate]

Are binary ionic solids like $\ce{NaCl}$ comprised of a cubic close packed structure of the anions with the cations filling interstital holes or do the cations and the anions contribute to the cubic ...
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1answer
107 views

Can magnetic fields affect a chemical reaction?

This question was asked recently in an interview and I just said that "Yeah, like if the reaction involves ions or paramagnetic species". But the interviewer went on and asked me to elaborate on HOW ...
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1answer
38 views

Nomenclature of inorganic compounds

As depicted in books, $\ce{NO3-}$ and $\ce{NO2-}$ are called as nitrate and nitrite respectively. Where (-ate) suffix is used for higher oxidation state and (-ite) suffix is used for lower oxidation ...
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1answer
34 views

what's the oxidation state of Nitrogen in nitrate ion? And it's structure? [duplicate]

What's the oxidation state of Nitrogen in $\ce{NO3-}$ ion. Simple calculation depicts that it's +5 . But 2nd period elements never show variable oxidation states. And it's structure is so confusing. ...
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How do I make a dysprosium chloride solution from dysprosium oxide?

I know that dysprosium oxide is insoluble in water. I was told that I need to add concentrated $\ce{HCl}$ to the compound and then evaporate the $\ce{HCl}$ off. From looking at the reaction equation, ...