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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Melting and boiling point [on hold]

At 39 C iron is solid, lauric is a soft solid, ethonal is a liquid, and butane is a gas order the substance in increasing order of melting point. I don't see a a gas melting ):
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7 views

Factors determining reducing strength [on hold]

How do heat of vaporization, ionization enthalpies and heat of hydration of their ions affect reducing strength (reduction potential) of an element? What are the reasons for these effects?
5
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1answer
63 views

What is the chemistry behind black colour of platinum black? [on hold]

Platinum is a silvery white metal and is highly unreactive then why it's powdered form "platinum black" is black in colour?
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18 views

Do anions help to fulfill both primary and secondary valencies when they complex with a metal ion?

When an anion bonds with a metal ion to form a complex ion, does it contribute toward fulfilling both the metal's primary and secondary valencies together? If so, how does this process occur at the ...
2
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2answers
39 views

When are the prefixes bis, tris etc. used in nomenclature of complexs?

Are the prefixes bis-, tris- etc. used only for ligands that are bidentate in complex nomenclature?
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0answers
27 views

Does Mercury (I) Chloride react with HCl?

If solid $\ce{Hg2Cl2}$ is placed in concentrated $\ce{HCl}$, will it react? If so are the products $\ce{Hg2^2+}$, $\ce{H2}$, and $\ce{Cl2}$ ? $$\ce{Hg2Cl2(s) + 2HCl(aq) -> Hg2^2+ + 2Cl2(g) + ...
0
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0answers
18 views

Absorption Extinction Coefficient [on hold]

What affect would hydrogen peroxide have on the absorption extinction coefficient of the UV/Vis spectrum of a nanocluster (like {Mo$_{154}$})? I think it may have something to do with catalysis but ...
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0answers
21 views

What are primary and secondary valancies at atomic level? [on hold]

Is Primary valency the combining capacity of metal ion in complexes by which it fulfills its octet and Secondary valency the combining power of metal ions in complexes by which it combines with other ...
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0answers
30 views

LiCl is soluble in pyridine while other halides are not

LiCl is soluble in pyridine, while other Li halides are not, why is this? I know that LiCl is deliquescent Like MgCl and Li halides are covalent and are soluble in organic solvents, then, why is it ...
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0answers
31 views

Displacement of chlorine by fluorine [on hold]

The electronegativity of fluorine is highest and chlorine has the greatest electron affinity. So, can Fluorine gas displace the Cl radical from a KCl solution? Is displacement dependant on electron ...
0
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0answers
58 views

What is the IUPAC name of [Cr(H2O)5Cl]Cl2.H2O [on hold]

Without water it should be pentaaquachlorochromium(III) chloride but how is the complex named with water of crystallisation?
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41 views

Calculate the Concentration of HCO3^- and CO3^2- [closed]

Surface water in an open area of the Indian Ocean adjacent to Kenya has an alkalinity of $2320~\mathrm{\mu equiv/L}$ and a DIC concentration of $2.03 \cdot 10^{–3}~\mathrm{mol/L}$. Calculate: ...
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0answers
23 views

Isomers of the Keggin Unit [on hold]

How many isomers of the Keggin unit are possible? Explain with the aid of simple diagrnas and point out their molecular symmetries in point groups. I think there are 4/5 isomers and one of the ...
0
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0answers
18 views

Gram-Equivalents of Surface Area [on hold]

A typical small football pitch is 90 x 120 $m^2$. How many gram-equivalents of HKUST-1 would be required to achieve the same surface area? I found out that the BET surface area is 1500-2100 $m^2$/g ...
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0answers
32 views

Is it the water molecules water of crystallisation? [on hold]

In $\ce{[Cr(H2O)5Cl]Cl.H2O}$ is the water outside the coordination sphere a water of crystallisation?
2
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2answers
67 views

Confusion about the oxidation state of copper in copper cyanide redissolved with excess cyanide

$\ce{CuSO4}$ when reacts with $\ce{KCN}$ forms $\ce{CuCN}$ while it is insoluble in $\ce{H2O}$. It is soluble in excess of $\ce{KCN}$ due to the formation of the following complex: a) ...
0
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1answer
27 views

Explain the difference in stability of permanganate ions in acidic/ alkaline solutions?

The question is such: I know that the permanganate ion is more stable in alkaline solution than in acidic solution, as the more positive electrode potential in acidic solution means more negative ...
3
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1answer
32 views

Chemical test for ferrous ions

I have a reference sheet for inorganic analysis which says that the confirmatory test for ferrous ions is as follows: "Make a solution of the given salt (whose cation is to identified) and add ...
1
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1answer
32 views

Preparation of Sodium Peroxoborate- Equations

Write balanced equations for each step, and an overall equaion, for the preparation of sodium peroxoborate hexahydrate from the reagents borax, $\ce{NaOH}$, and $\ce{H2O2}$. Borax was added to a ...
1
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1answer
55 views

What is the IUPAC name of [Co(NH3)5H2O]Cl3?

I am not getting if it is Pentaammineaquo cobalt(III) chloride or Aquopentaammine cobalt (III) chloride-should the prefix be ignored while naming the ligands in alphabetical order? Besides how should ...
0
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0answers
19 views

how concentration affects the kind of product in inorganic chemical change? [duplicate]

I think that in every chemical reaction,the reactants first decomposes and then the change occurs...is this true? if it is, then how come diluting concentration gives different product in a reaction ...
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0answers
25 views

Qualititative inorganic analysis

Why is it that a specific order is followed while performing qualitative inorganic analysis? I mean, why are we told to first test for the anion in the given salt (and there is an order to be followed ...
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0answers
26 views

Assigning IR of [Cu3(btc)2]

I am trying to identify the peaks due to the carboxylate groups in the IR of $\ce{[Cu3(btc)2]}$. I think that the large peaks at $1643.76~\mathrm{cm^{-1}}$ and $1369.19~\mathrm{cm^{-1}}$ are both ...
0
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0answers
15 views

Calculating the surface area of CDMOF

I am trying to use this graph to estimate the surface area of a CDMOF. The graph below is a part of the nitrogen adsorption isotherm on 0.307mg. Would I have to use the BET isotherm to work out ...
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1answer
21 views

aluminum hydroxide as an electrolyte

A friend and I recently produced some aluminum hydroxide, $\cf{Al(OH)3}$ for a project, and we wondered how it functions as an electrolyte. We know it has a low conductivity and solubility, but we ...
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61 views

How to recycle 60 tons/hour of CaCO3?

I hope this is the right place to ask. I'm not a chemist so my question may seems obvious but it's not for me. I work in the egg industry and we produce every hour 60 tons of dried egg shells as ...
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15 views

Calculate the molarity of the solution? [closed]

An aqueous solution x contains 20% x by mass. If the density of the acid is 1.25g/cm3. Calculate the molarity of the solution?
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19 views

Low melting point of Manganeese [duplicate]

Melting point of manganese is lower than that of other 3d series except copper and zinc. Melting point increases from scandium to chromium. The reason given in my book for this trend is the increase ...
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votes
1answer
39 views

How does an air conditioner produce liquid [closed]

I always notice that when an air condition is working and cooling the room it, is heating outside the room and a Liquid is dropping from the other side of the air conditioner. how does this happen and ...
0
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0answers
19 views

Carbon dioxide capture in a Metal-Organic Framework

We have been learning about the adsorption processes: chemisorption and physisorption. What would the reaction mechanism for the chemisorption of carbon dioxide onto a CD-MOF (cyclodextrin ...
0
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0answers
26 views

Hydroxide storage

I am figuring out what chemicals to store with Ammonium hydroxide. At the moment a 2-shelf corrosive resistant fume hood cabinet will be used. I have in mind storing the Ammonium hydroxide with ...
0
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1answer
47 views

Hybridisation of hexaamminecobalt(III) complex [duplicate]

Does $\ce{[Cr(NH3)6]^3+}$ have $sp^3d^2$ or $d^2sp^3$ hybridisation? Oxidation state of $\ce{Cr}$ is $+3$. The electronic configuration is $3d^3$ and the $d$ electrons occupy $t_{2g}$ orbitals. If ...
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23 views

exam question about real pH of pure water [closed]

as in the exam: which of these fact apply for water all the time $\ce{[OH^{−}]=[H+]}$ $\ce[H^+]} = 10^{-7}$ $\ce{[OH^{-}]} = 10^{-7}$ pH = 7 thank you!
0
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1answer
24 views

How do I figure out the amount of water (mL) and amount of Aluminum (g)?

We have a project where we have to extract copper from copper sulfate. But my group is given a powder version ($5~\mathrm{g}$), so we have to first dilute it with water and then combine it with ...
0
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0answers
17 views

Why is equilibrium constant unitless? [duplicate]

Why is equilibrium constant like kp and kc unitless? It should be unitless when the number of product and reactant molecules are equal but why is it so in other cases?
5
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1answer
362 views

CuCl2 has colour but CuCl does not

$\ce{CuCl2}$ is green in colour while $\ce{CuCl}$ is white. What is the reason for this? Is it because the first compound exists as a complex ion and has d-d transitions?
0
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1answer
37 views

Test for Fe2+ ion in salt using potassium hexacyanidoferrate(III)

It's given in my book that $\ce{Fe^3+}$ ion reacts with potassium hexacyanidoferrate(III) to give brown colour. $$\ce{Fe^3+ + [Fe(CN)6]^3- -> Fe[Fe(CN)6]}$$ Both the reactants have the same ...
0
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0answers
18 views

Does Lead(II) Nitrate satisfactorily answer the brown ring test?

Does Lead(II) Nitrate answer the brown ring test satisfactorily? Shouldn't the precipitation of lead(II) sulfate be more predominant? I tried this in the lab and it seemed to show the ring test quite ...
5
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1answer
72 views

Is trisulfuric acid hypothetical?

In the preparation of sulfuric acid through contact process, Hot sulfur trioxide passes through the heat exchanger and is dissolved in concentrated $\ce{H2SO4}$ in the absorption tower to form ...
0
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0answers
25 views

Do neutral solvents besides water do something like irreversible hydrolysis?

Hydrolysis of some salts is irreversible. But while water is "special," there are plenty of other solvents of medium to low pH. I assume that if they can dissolve a salt, and they have free H ions, ...
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How can I restore the surface of ABS polymer products?

Recently I asked a question about de-yellowing Lego. I have a follow-up question on this. I try to design a setup where I can de-yellow Lego and remove/obscure any scratches from the surface of Lego ...
1
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1answer
50 views

How can rocks absorb CO2?

In the beginning of the earth, there was at a certain point so much $\ce{CO2}$ in the air that most of it was absorbed by rock. The consequence of that was the snowball earth, because the atmosphere ...
0
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0answers
38 views

What factors influence the resultant oxidation state of Fe in 3Ca(OH)2+2FeCL3?

$\ce{3Ca(OH)2 + 2FeCl3 -> 2Fe(OH)3 + 3CaCl2}$ What factors influence the resulting oxidation state in the iron hydroxide molecule in this reaction? Since iron's oxidation state ranges from +2 ...
1
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0answers
40 views

Radiating chemical suggestion?

Given a flat and thin object laying on a table, such as a small piece of silver paper or a small piece of cardboard, I want to find a way to detect which face of it is facing up. The solution should ...
1
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1answer
34 views

Halides of group 15 elements [closed]

Why are the pentahalides of group 15 elements more covalent than the trihalides?
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2answers
139 views

Why do we scratch the walls of test tube in test for Magnesium or Calcium basic radicals?

In test for Calcium ion (Group V) , we add Ammonium Carbonate in presence of Ammonium Hydroxide and then white precipitate (of CaCO3) is formed which is dissolved in Acetic Acid and then reacted with ...
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8 views

Is it possible to determine hydrogen sulfide in sweet gas manually using volumetric analysis?

Is it possible to determine hydrogen sulfide in sweet gas manually by volumetric Analysis?
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1answer
34 views

What is the electronic configuration of Cr(1) ion

I beleive it should be d5 , but i found out that it is d4s1. Is it so? I have not found any explanation for the following. Kindly help. Thanks
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34 views

Comparing IR stretching bands in molybdenum complexes

Why would the infrared stretching frequency of $\ce{CO}$ (which is about $2140~\mathrm{cm^{-1}}$ in gaseous form) be $1982~\mathrm{cm^{-1}}$ in $\ce{[Mo(CO)_6]}$ and even lower in ...
1
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1answer
67 views

What kind of bonds can form between benzene and transition metals in π-complexes?

I'm trying to draw the six π-orbitals (3 bonding, which are filled, and 3 anti-bonding) of a benzene ring when it complexes with metal d-orbitals and which metal orbitals have the correct symmetry ...