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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how is calcium sulfate made?

I'm doing a chemistry project on ionic compounds found on food labels, and I can't find a clear article on how calcium sulfate is made for edible foods. I know it comes from calcium sulfate dihydrate. ...
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1answer
23 views

Reaction of chlorine with hot/cold solution of hydroxide

When chlorine reacts with cold solution of say potasium hydroxide, the disproportionation goes to lower oxidation states: $\ce{Cl2 + 2 KOH -> KCl + KClO + H2O} $ Whilst with hot solution the ...
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21 views

What gives variations in the color of cadmium sulfide paint pigment?

Oil paint manufacturers sometimes make several "shades" of a color, all of which list the exact same chemical ingredient. For example, look at Gamblin's artist grade oils, in the yellow colors, ...
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1answer
49 views

How should I construct the orbitals of dilithium using only pen and paper?

For a week I have lessons about quantum chemistry and I have a trouble understanding how to arrive at the good answer for the drawing of the orbital $(\ce{III})$ for $\ce{Li2}$ (see the second ...
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12 views

net ionic equations help [on hold]

3 questions A,B and C. A is in regards to chromide and the last two are related to hydroxide. I would really appreciate it. Thank you so much A)Consider the reaction when aqueous solutions of ...
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37 views

19F MAS NMR chemical shift tensor and the crystal structure

$\ce{^{19}F}$ MAS NMR is measured on fluorine-doped $\ce{TiO2}$. $\ce{F}$ is to substitute $\ce{O}$ and the crystal structure is anatase, which has a tetragonal crystal system with a space group ...
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1answer
39 views

What is hybridisation of XeF6 in solid state?

According to the following formula: Type of hybridisation/steric no. = (no. of sigma bonds + no. of lone pairs) it should be sp3d3, however according to my textbook it is sp3d2 in solid state. That ...
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16 views

Confusion regarding coexistence of chemical compounds [on hold]

The pair of compounds that can exist together is: (1) FeCl3, SnCl2 (2) HgCl2, SnCl2 (3) FeCl2, SnCl2 (4) FeCl3, KI I didn't know how to decide this!
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1answer
64 views

Bond length increase when replacing nitrogen with phosphorus for NH3 and NF3

There is an increase in bond length of about $40\rm~pm$ from $\ce{NH3}$ to $\ce{PH3}$, but only by about $20\rm~pm$ from $\ce{NF3}$ to $\ce{PF3}$. I understand that the bond length will increase with ...
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42 views

Mechanism for the Cleavage of Diborane?

The cleavage of diborane was presented in a recent lecture, and it was said that the borane could be cleaved unsymmetrically if sterics allowed, or symmetrically if they did not, as shown in the image ...
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19 views

Unit cell question on determining compound stoichiometry of KCoS?

For 5(a) and 5(c), how are we determining that the answer is K4CoS4? I keep counting it and getting K2CoS2. We know that the K and the S ratio must be 1:1, but how can we count the Cobalt? . ...
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1answer
70 views

Why does NaOH catalyze H2O2 decomposition? [duplicate]

I had a lab practice in which I had to test the effectiveness of different catalysts for the decomposition of $\ce{H2O2}$. Among them, there was: $\ce{KI(aq)}$, $\ce{FeCl3(aq)}$, $\ce{MnO(s)}$, ...
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2answers
31 views

Phosphates Functional Group

In my text book it states that a phosphate group is considered to be $\ce{-OPO3^{2-}}$. However, online it states that phosphate is $\ce{PO4^{3-}}$. Why do these contradict? Am i confusing phosphate ...
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12 views

Standard Enthalpy of Formation for Sulfur Trioxide

Standard enthalpy of formation is, to my understanding, the change in enthalpy when one mole of a compound is produced from its constituent elements in their standard states at STP. How would one ...
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18 views

What is hardness and what factors govern it? [duplicate]

Does hardness of an element implies force needed to compress that element in solid state or something else? And what factors govern it? Taking example of s-block elements, Li and Be are hardest in ...
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1answer
32 views

1H NMR of Acetylferrocene

I'm trying to analyse the proton NMR of this, and there's one singlet for the H on the non-substituted Cp ring and a singlet for the methyl group, as expected. However, while I was expecting to ...
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2answers
187 views

Why do XeO and XeF8 not exist?

Since Neil Bartlett's 1962 discovery that xenon was capable of forming chemical compounds, a large number of xenon compounds have been discovered and described. Almost all known xenon compounds ...
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15 views

Do all covalent nitrates on heating decompose to give NO2?

Being covalent we can conclude that they will on heating decompose completely, but will they give only NO2 and not any other oxide is the question. It is observed in PbNO3, AgNO3 and also LiNO3(the ...
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12 views

why is rubidium smaller than potassium [closed]

I was just glancing sizes of elements and found rubidium is smaller than potassium. But as rubidium is adding a shell to itself it ought to be bigger. Should't it?
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17 views

How many electrons does boron have on average in B2H6?

The boron interaction with hydrogen gives it one electron I suppose, but then the octet is not complete. So how many electrons does the boron atom have exactly and why?
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67 views

Determination of mass of iron and insoluble filler [closed]

A bottle contained 100 tablets. Most of each tablet was an iron(II) salt. The remainder of the tablet was a filler of calcium sulfate with small amounts of other substances. All the tablets were ...
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36 views

Can I convert elemental nitrogen to nitrous oxide?

Can I convert nitrogen to $\ce{N2O}$, to conduct barking dog reaction, where it's needed as oxidizer?
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2answers
48 views

Why is solid sodium hydride a base and not an acid when reacted with water?

When solid $\ce{NaH}$ is mixed with water, the products are not $\ce{Na-}$ and $\ce{H3O+}$. The reaction yields $\ce{NaOH}$ and $\ce{H2}$ gas. Why does solid $\ce{NaH}$ not act as a Brønsted acid in ...
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1answer
21 views

What makes a species “fluorescence quencher”?

I just came across an article where they said that sodium fluoride is not quencher (in the context of fluorescence). Why is NaF not a quencher but NaBr is one?
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27 views

What is the hybridisation of CF3 free radical?

Having 3 sigma bonds in a similar manner to CH3 free radical it should also have hybridisation sp2. However, if we look at its shape, it is pyramidal and not planar unlike CH3 free radical(which is ...
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2answers
139 views

Why carbon tetrachloride is an organic compound?

Wikipedia says: Carbon tetrachloride […] is an organic compound with the chemical formula $\ce{CCl4}$. From an organic point of view, carbon tetrachloride can be called the tetrachloro ...
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53 views

Metallic and magnetic nature of oxides,transition elements,

Which of the following oxides is both metallic and ferromagnetic? VO2 , CrO2 , MnO2 , TiO2 This is how I went about solving it: Since ferromagnetic materials also show paramagnetism,so the condition ...
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1answer
29 views

Classification of oxides,transition elements

I understand what basic,acidic and amphoteric oxides are. But how do we classify oxides on the basis of metallic nature?Explain how we can deduce if the oxide is metallic or not. For example,what ...
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1answer
330 views

Why does sodium sulfate initially harden instead of dissolving?

I was recently drying a product by passing it through a bed of sodium sulfate in a fritted glass Buchner funnel. Once I had finished up working my reaction, in an ill-advised attempt to clean up, I ...
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11 views

How can one find the maximum number of oxidation states for an element?

How can you find the maximum number of oxidation states for an element (or even just a general estimate for the number of oxidation states)? Finding the oxidation number for an element in a compound ...
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19 views

Method and Tips for Inorganic Qualitative Analysis

In a few weeks time I will be doing a inorganic qualitative analysis test which is very pressed for time (a majority of people don't finish). The form of the test is most likely going to be that there ...
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1answer
69 views

Sulfuric acid's effect on rocks

I am no chemist, nor did I pick up much understanding of chemical reactions in school. But I would like a basic understanding of how "reactive" and "potent" sulfuric acid is on rock; i.e., whether or ...
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1answer
93 views

Why are bromine oxyanions uncommon?

Sodium hypochlorite is used in bleach, calcium hypochlorite is used in public swimming pools, ammonium perchlorate is used in solid rocket fuel. Sodium periodate is used in the cleaving of ...
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1answer
25 views

Space Group names

In space groups, how do know if which axis/planes the glide/mirror/rotations are perpendicular to. For example in Pnma, how do we know that a-glide plane is perp to c-axis, n-glide plane perp to ...
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1answer
41 views

Why triiodide ion does not form ionic bond with cation having +2 charge?

In general, I found that triiodide ion generally forms ionic bond with cations having +1 charge like $\ce{NH4+I3-}$, $\ce{K+I3-}$, $\ce{Tl+I3-}$. But, I have never seen triiodide ion forming ionic ...
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Why -COOH group on the Graphene quantum dots have much more affinity with Hg(II) than other ions?

Could anybody explain why the COOH group around the edge of the GQDs have much more affinity with Hg(II) than others?
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63 views

If d-electrons are such poor shielders, why do trends increase more gradually across the d-block than the s or p-block?

If I understand correctly, the shielding effect of d- (and f-) electrons seems to be much poorer than those of s- and p-electrons, due to the fact that they are less penetrating, have less electron ...
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29 views

How does 2.685424 round to the nearest scientific hundredth?

So, yes, in math, we would round 2.685424 to 2.69 when asked to round to the nearest hundredth. However, my understanding is that we round to the nearest even number when rounding scientifically from ...
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19 views

Looking for solubility kinetics of zinc chloride hydroxide monohydrate

$\ce{Zn5(OH)8Cl2·H2O}$ is a crystalline solid insoluble in water. Often used as nutritional supplement. Preparation and chemistry of zinc chloride hydroxide monohydrate is known. I am looking for some ...
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1answer
39 views

Are labile tetrahedral [Mabcd] complexes optically active?

In the above mentioned complex, there is a chiral centre at the metal, and hence it seems the compound must be optically active. But my course notes say that the ligands keep on changing their their ...
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46 views

Why isn't Thallium TriIodide Stable?

We know that stability of higher oxidation state (+3) decreases and stability of lower oxidation state (+1) increases , So Thallium is most stable in its +1 oxidation state Due to Inert pair effect ...
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33 views

Why are gold-sulfur bonds so stable?

In my analytical chemistry book, I have seen that molecules' electrical conductance has been measured by putting sulfur-containing groups on them and using atomic force microscopy with a gold surface. ...
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40 views

Bond angle order of SF2, OF2, HOF

Arrange the following componds in the increasing order of bond angle. $$\ce{HOF,~OF2,~SF2}$$ I know that bond angle of $\ce{SF2}$ will be less than the bond angle of $\ce{OF2}$ because of ...
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2answers
44 views

How does a group 15 oxide react with water?

Given the following reactants: $\ce{P2O5}$ and $\ce{H2O}$ How does one determine what product the two will form in a reaction? I instantly tried to treat the problem as a double displacement ...
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34 views

How do sulfate and sulfite have the same charge?

I noticed while I was practicing naming compounds with polyatomic ions (I'm only in middle school) that sulfate and sulfite have the same charge. How does this make sense, since sulfate has one more ...
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1answer
37 views

order of solubility of compounds in water

Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent ...
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35 views

Can we make glass by heating Martian Soil

I was puzzled by a very interesting question. Can we heat up Martian sand and produce glass just the way we do here on Earth. (The Basic way) For info, Martian sand consists of the following - ...
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What reactions does this steel cold-bluing solution undergo?

Bluing steel generally refers to the process of forming a protective layer of $\ce{Fe_3O_4}$ ("black iron oxide") that prevents normal rust from forming. The chemistry behind the traditional ...
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28 views

Simplified Chromatography - will this work?

I am interested to separate a sample matrix via a method very similar to chromatography. The reason I am asking about this is because I am planning to integrate this method with my SERS application. ...