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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Inorganic Chemistry: Lattice energy, Madelung constant and Born Exponent

I would like to know if you can find Madelung constants in the data book and how to work out the born exponent for ionic structures such as NaCl, Its something simple but i dont know fully ...
3
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0answers
17 views

Are all deliquescent salts highly soluble?

$\ce{Na2CO3}$ is deliquescent in nature, and $\ce{NaHCO3}$ is not, for example, so $\ce{Na2CO3}$ should have been more soluble than $\ce{NaHCO3}$ in water ($\ce{NaHCO3}$ I always thought was less ...
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0answers
16 views

Magnesium Element Thermodynamic properties M.P & B.P [on hold]

Why M.P & B.P of Mg is lower than other member of its group Like Ca ,Sr, Ba, Ra? Explain Why it show this kind of bahaviour.
3
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1answer
41 views

Why is the conductivity of non-metals not equal to zero?

My chemistry book says that delocalized electrons are the reason for electrical conductivity in a metal. However it says that nonmetals like sulfur, phosphorus and silicon have "low" conductivity. How ...
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0answers
27 views

Can a stable element react with an unstable compound?

So my chemistry teacher was giving an example of a dipolar bond. So the example is:- We have a boron atom(with the electronic configuration of 2,3) covalently bonded with three fluorine atoms(with ...
3
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24 views

Why are multiple oxidation states useful for a catalyst?

Transition elements are good catalysts because they have multiple oxidation states?Why multiple oxidation states matter?
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0answers
30 views

Is it possible to dope Ca ions in an NaCl crystal to produce a vacancy defect?

I was just reading about defects and doping in solids and read about the defect in ionic crystal ($\ce{NaCl}$). There were examples of $\ce{SrCl2}$. Could this also occur with $\ce{CaCl2}$?
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0answers
16 views

Why does the lone pair of electrons have no effect on the dipole moment of PH₃? [duplicate]

Why the lone pair of electrons has no effect on dipole moment of $\ce{PH3}$ unlike $\ce{NH3}$? Taken in account that the bond angle is said to be 92 degrees.
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0answers
15 views

Standard Half-Cell Reduction Potential for Periodate to Iodine

I'm looking for standard half-cell reduction potential $\ce{IO4-}$/$\ce{I2}$ in acid medium. Unfortunately I was unable to find the value in all comprehensible reference books. Hard to believe this ...
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2answers
409 views

How come there aren't any silicon analogs of alkenes or alkynes?

We know that there are silicon analogs of alkanes, but according to Wikipedia, silicon analogs of alkenes or alkynes are virtually unknown. How come?
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1answer
23 views

Compounds that adopt the zincblende structure

Zinc sulfide, copper iodide and copper bromide all adopt the zincblende structure. My lecture notes suggest that this structure is adopted preferentially over the wurtzite structure if the bonding is ...
2
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1answer
33 views

Why does solvent leveling occur?

Solvent leveling means that strong acids completely dissociate in that solvent so it is impossible to distinguish between two acids that completely dissociate in it. A solvent levels and acid if the ...
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0answers
24 views

What makes a metal more inclined to bond covalently? [duplicate]

Many metals form compounds with s-block elements that are essentially entirely ionic. However, elements like silver, copper, lithium and so on, can form bonds that are significantly covalent in ...
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1answer
55 views

Why is Lithium the strongest reducing agent, and not Cesium?

Cesium has a larger size and the effective nuclear charge that the valence electron experiences will be far less compared to that of lithium's, right? ...but lithium is still considered the strongest ...
2
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1answer
53 views

I need to find the Ka of a weak acid in titration with a strong base

I have been working on this lab forever and have not been able to get a $K_\text{a}$ anywhere close to the accepted value. I’m sure I’m missing something really simple. We titrated $\ce{CH3COOH}$ ...
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1answer
29 views

Why is the melting point of TiCl4 lower than TiCl3

I was wondering why the melting point of $\ce{TiCl4}$ was below that of $\ce{TiCl3}$ The melting point of the former is $\ce{-25 Celsius}$ whereas the latter is $\ce{425 Celsius}$ . Thanks!
2
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0answers
14 views

Spectral reflectance identification of types of iron rust

According to the Wikipedia page about rust, there are red and green types of rust that occur on iron. Red rust is the reaction with oxygen and water and the green with chlorine (in oxygen poor ...
2
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1answer
31 views

Colorimetric test to measure dissolved oxygen in salt water

Are there any simple colorimetric tests for measuring the dissolved oxygen in salt water, which do not involve titration like in Winkler method ? i.e. Are there any chemical reagents, which when ...
2
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4answers
49 views

Justify assuming first-order kinetics for a complex

For the hydrolysis of $\ce{\mathit{trans\hyphen}[Co(en)2Cl2]Cl}$ (and cis) we measured reaction rates via spectrophotometry. Plots of change in absorbance $(\ln(A-A_\infty))$ were used to determine ...
2
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1answer
33 views

Suggest a method, other than spectrophotometry, for determining the reaction rate

For the hydrolysis of $\ce{\mathit{trans\hyphen}[Co(en)2Cl2]Cl}$ (and cis) we measured reaction rates via spectrophotometry. Plots of change in absorbance were used to determine the rate law and the ...
3
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1answer
57 views

Corrosion of iron

First question regarding corrosion of iron: Why is anodic area always located at nicks and scratches, where energy state is high? (does"high [potential] energy" mean unstable structure?) ...
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0answers
40 views

Why [MnCl6]^2- has got 4 unpaired electrons instead of 3?

In $\ce{[MnCl_6]}^{2-}$, $\ce{Mn}$ has +4 oxidation state which gives it a $\ce{3d^3}$ $\ce{4s^0}$ configuration. But how is it having 4 unpaired electrons?
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1answer
30 views

Hydrogen and Helium ideal gas behavior in room temperature

Which one of hydrogen and helium behaves more like ideal gas in room temperature... I thought hydrogen gas would show more ideal behavior in room temperature because it has lighter mass (less no of ...
2
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2answers
64 views

Analogies of azide?

Azide is a fairly common ion, but why aren't there similar versions such as $P^-_3$ or $B_3^+$? Do they exist, is there something wrong with these ions as to make them more likely to just break apart ...
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1answer
38 views

How to remove nitrate from water sample?

Are there any simple methods to completely remove nitrate ions from few ml of impure water sample ? One method I am curious about is the following process : Add one or more reagents to water in ...
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0answers
24 views

Why does this reaction take place in terms of electronic structure?

I need to know, in terms of electronic charge - the electrophiles and nucleophiles involved - how the electronegativity of the potassium and hydrogen atoms alongside the hydroxide and H+ ions result ...
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1answer
28 views

Partial hydrolysis of XeF6

What are the products of partial hydrolysis of $\ce{XeF_6}$? Is $\ce{XeOF_4}$ formed or $\ce{XeO_2F_2}$?
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16 views

Reason behind ZnO color [duplicate]

Why is zinc oxide yellow when hot and white when cold? Is it yellow because of the flame used to make it hot?
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1answer
47 views

Allotropy in Nitrogen and Bismuth of Group 15

Which all elements of Group 15 of the periodic table have allotropes? P, As and Sb have well-known allotropes. P - White, Red and Black. As - Yellow, Black and Gray(Grey) Sb - White, Yellow and ...
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1answer
32 views

What exactly is Indium's ability to stabilize non-ferrous metals?

I was reading the History section about Indium on Wikipedia when I came across the following sentence: In 1924, indium was found to have a valued ability to stabilize non-ferrous metals, which ...
3
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0answers
18 views

How to measure band gap of powder sample with using diffuse reflectance method

We have UV SHİMADZU 2550 and its diffuse reflectance attachment. I want to measure band gap of single crystal samples. What should I do? Which formulas should I use to calculate band gap? I don't have ...
0
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1answer
36 views

Sodium thiosulfate formation

I have a problem solivng this chemical problem. Any help would be highly appreciative. Sodium Thiosulfate can be made by the reaction $\ce{Na_2CO_3 + 2Na_2S + 4SO_2 -> 3Na_2S_2O_3 + CO_2}$ ...
2
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0answers
23 views

What causes passivity of specific metals in conc. nitric acid?

I know that specific metals like $\cf{Pb}, \cf{Sn}$ and $\cf{Al}$ become passive in conc. nitric acid. My questions are: Why does this happen only with conc. nitric acid, and not other conc. acids? ...
2
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1answer
28 views

Singlet oxygen production

Why is in the reaction of hydrogen peroxide and sodium hypochlorite, singlet oxygen obtained? Why isn't triplet oxygen produced instead, as it is thermodynamically more stable?
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1answer
969 views

Why is NaCl3 possible?

There. And there. Almost a year ago, a group of scientists claimed to have reached compounds of $\ce{Na}$ and $\ce{Cl}$ with weird stochiometries ($\ce{NaCl3, Na3Cl, NaCl7, Na3Cl2}$ and $\ce{Na2Cl}$). ...
2
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0answers
22 views

Does Gallium (liquid or solid) corrode all forms of brass?

I know that it corrodes copper, but does it do the same to all brass or bronze compositions?
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1answer
41 views

How do we predict the order of melting points of group 1 and group 2 halides?

I get really confused by this: The order of melting points of group 2 chlorides is: $$\ce{BaCl2 > SrCl2 > CaCl2 > MgCl2 > BeCl2}$$ This is completely understandable by Fajan's Rules. ...
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1answer
49 views

Why does Si2H4 readily polymerize at RTP but ethene does not (requires catalyst)?

In the case of both Silicon and Oxygen, the double bond is less stable than two single bonds. Consequently, surely both should polymerize, why don't they? What accounts for the difference between ...
5
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3answers
87 views

Why does sulphur form S8 instead of S3?

P forms $\ce{P4}$ due to its inability to form double/triple bonds. So it makes a sort of tetrahedral structure. S however makes $\ce{S8}$ cycles w/ $sp^2$ hybridization. Why go all that way to ...
2
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0answers
26 views

Why is diborane cleaved symmetrically by trimethylamine but unymmetrically by ammonia?

I know that soft bases cleave dibrorane symmetrically but hard ones don't. However, what makes ammonia harder than trimethylamine? And why does hardness/softness affect this?
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28 views

How to synthesize Boron tri-fluoride using Boron Oxide

I am finding different equations for the synthesis. My lecture handout suggests a reaction with Sodium tetrafluroborate and Sulfuric acid. This is fine but I have to remember this for an exam and that ...
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1answer
25 views

Why is only one proton transferred in the reaction between Sulfuric acid and Sodium Chloride

$$NaCl+H_2SO_4 \to NaHSO_4 + HCl$$ The above reaction happens, but why doesn't the following happen? Or does it but only when one of the reactants is in excess? $$2NaCl+H_2SO_4 \to Na_2SO_4 + 2HCl$$ ...
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2answers
65 views

What are the resonance structures for chlorite anion?

What are the possible resonance structures for $\ce{ClO_2^-}$? Assigning one double bond to the structure makes for formal charges of $\ce{O (-1) - Cl (0) = O (0) <-> O (-1) = Cl (0) - O (-1)}$. ...
2
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0answers
32 views

Does the magnesium 2+ ion prefer an octet or more?

In organic chemistry I was told that the magnesium ion which is part of Grignards is coordinated to several ether molecules. The overall structure around the magnesium is tetrahedral, which implies ...
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1answer
38 views

Why do ionic solids change to a structure with a higher coordination number at high pressures?

This seems counter intuitive to me since ionic radius increases with increasing coordination number. Surely the solid doesn't expand under high pressure? Can you explain?
2
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2answers
50 views

Does sodium form complexes like transition metal ions?

I realise that there is a similar question here Difference between sodium ion and a transition metal ion dissolving in water? and it seems to answer my question, however I was reading about how ...
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1answer
44 views

How can transition metals form so many bonds with ligands? [duplicate]

For instance, copper can form $\ce{[Cu(H2O)6]^2+}$ so it accepts 6 electron pairs from $\ce{H2O}$ molecules to form dative covalent bonds. However it has one electron in the 4s subshell and 10 in the ...
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0answers
18 views

Why are transition metal hydroxides insoluble?

From what I understand, adding NaOH to a solution containing transition metal ions gives transition metal hydroxide precipitates. Why is NaOH soluble but transition metal hydroxides insoluble? I have ...
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1answer
34 views

3rd analytical group of cations

If a mixture of Mn$^{2+}$, Zn$^{2+}$, Co$^{2+}$, Ni$^{2+}$ and Al$^{3+}$ salts is dissolved in water, a white dim solution is obtained. I guess that the aluminium and zinc ions hydrolysed and the ...
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3answers
46 views

Does tetramine copper dissolve cellulose?

I saw a Youtube video which showed that cotton (cellulose) dissolves in deep blue solution of tetramine copper made by adding 20% ammonia in copper carbonate salt. I tried to replicate the process ...