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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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Magnetic behavior of sodium thio-nitroprusside

Is $\ce{Na4[Fe(CN)5NOS]}$ contains $\ce{Fe(II)}$ and $\ce{NO+}$ and hence diamagnetic, or $\ce{Fe(III)}$ and $\ce{NO}$ and hence paramagnetic?If in this molecule NO transfers one electron to $\ce{Fe(...
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1answer
66 views

Quantum numbers required to specify the position of an electron

In a test today, there was this question: How many quantum numbers are required to specify the position of an electron? $$(A)\ 1 \quad (B)\ 2 \quad (C)\ 3 \quad (D)\ 4$$ The answer key says ...
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Is black phosphorous aromatic?

I know that graphite and boron nitride are aromatic in nature. In a similar way, can black phosphorous too exhibit aromaticity? Since it is essentially the same having 6 membered rings with lone ...
2
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1answer
41 views

Hydrogen bonding of chlorine [duplicate]

Even though nitrogen is less electronegative than chlorine according to Pauling scale bit why don't it form hydrogen bonding as effective as of nitrogen ? ( Electronegativity valve of N =3.0,Cl=3.2)
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Two different answers obtained by balancing this chemical equation!! Somehow [duplicate]

This is the concerned equation: $\ce{ XeF4 + H2O -> Xe + XeO3 + HF + O2}$ This can be balanced as $\ce{6 XeF4 + 12 H2O -> 4 Xe + 2 XeO3 + 24HF + 3 O2}$ or $\ce{5 XeF4 + 10H2O ->3 Xe + ...
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1answer
29 views

Are there processes of electric discharge to oxide As(III) into As(V)? [closed]

I want to know if there were any known experiment of electric discharge to oxyde the ion arsenic(III) into the ion arsenic(V).
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75 views

Why is there no effective alternative to metal salts in antiperspirants?

Metal salts, especially aluminum compounds are used in antiperspirants to prevent sweating. I found out aluminum chloride hexahydrate, which is found in most antiperspirants, undergoes an acid-base ...
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35 views

Why does the following “Battery” experiment work?

I did the following experiment: Experimental setup: Two electrodes (one made out of Iron,the other made out of Copper) are put into a (bluish) Copper(ii) sulfate lotion. Then, one connect a ...
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1answer
44 views

Why is the pH level of carbonation loss decreasing then increases afterwards?

We have done an experiment of the titration of unsealed sprite soda to find the amount of carbonic acid being loss on various duration (0 to 1 hour), due to decrease pressure. The calculation was to ...
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1answer
42 views

Disproportionation of 2 KO₂ + 2 H₂O → 2 KOH + H₂O₂ + O₂

How is the following reaction a disproportionation reaction? $$\ce{2 K\overset{-1/2}{O}_2 + 2 H2\overset{-2}{O} ->2 KOH + H2\overset{-1}{O}_2 + \overset{0}{O}_2}$$ In this, the OS are $-1/2$, $-2$...
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Alkyl insertion with cobalt and CO

Reaction of $\ce{(Cp)Co(Me)2(CO)}$ in the presence of excess $\ce{CO}$ yields two different organic products, $\ce{A}$ and $\ce{B}.$ The only metal-containing product is $\ce{(Cp)Co(CO)2}.$ The IR ...
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Compounds/elements that can react with ClF to give Cl are?

Out of Al, SF4, Co,U,S and SO2 which react with ClF to liberate Cl gas? My book (resonance rank booster) says Al, U and S react. Would someone please tell me if there is any way of predicting this ...
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3answers
316 views

If change in free energy (G) is positive, how do those reactions still occur?

I was doing a couple of problems for homework: Calculate $K_\mathrm{sp}$ of $\ce{AgI}$ at $55.0\ \mathrm{^\circ C}$ Calculate $K_\mathrm{b}$ of $\ce{NH3}$ at $36.0\ \mathrm{^\circ C}$ I have to use ...
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Why are palladium and platinum carbonyls unstable at room temperature?

By palladium and platinum carbonyls, I mean the mononuclear, homoleptic, charge-neutral, binary carbonyl complexes of the form $\ce{M(CO)_n}$ and not any heteroleptic complexes like $\ce{Pd(CO)(PPh3)3}...
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How can I change the synthetic conditions for powder product into single crystal growth?

I am working on growing metal-organic frameworks crystals based on hexatopic linker for different metals. Upon using some synthetic conditions it gave fast precipitation into powder material after ...
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1answer
99 views

What is the explanation of the structure of H2XeO4?

Using the obsolete VSEPR theory I had a hard time predicting the structure of $\ce{H2XeO4}$. So I looked it up. I found the molecule via chemapps.stolaf.edu: It looks weird to me. I can't explain the ...
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2answers
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Two cells are connected in series. If x g of silver are deposited in cell 1, what volume of oxygen is given off in cell 2? [closed]

I got the answer correct but I'm pretty sure my methodology was wrong. How would you solve such a question?
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1answer
85 views

Reference for electronegativities of different metal oxidation states

A long time ago I was researching the effect of the self regulatory response in Fe and Co. I found that my results made sense based on the idea of the electronegativity of the ions considered. I found ...
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0answers
38 views

Gibbs free energy of activation and activation energy [duplicate]

What the difference between Gibbs free energy of activation and activation energy
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0answers
44 views

Why F- is more stable than CH3-

When I was reading Organic textbook, I saw a statement of 'F- is more stable than CH3- because the F has a greater electronegativity'. I agree with the explanation 'because of its high ...
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0answers
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Trend of thermal stability of Group 2 chlorides down the group [duplicate]

Thermal stability of group 2 chlorides follows the order: $\ce{BeCl2>MgCl2>CaCl2}$. Talking about carbonates of group 2 metals, the thermal stability increases as we move down the group due to ...
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3answers
649 views

Is there a method to separate iron from mercury?

The mercury is contaminated with iron. Is there any way to remove iron from mercury?
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0answers
57 views

An unknown glassware piece from our cupboard

We have multiple of these. It is a small glass funnel with splits into 3 spouts from it. Now, we are thinking it might be similar to a cow receiver, however, I have never seen one this small or ...
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0answers
42 views

Amount of benzoic acid required to alter pH of a NaOH-solution

I am trying to do a practice problem but I can't figure it out: How many grams of benzoic acid needs to be added to 0.10 l of a NaOH-solution with a concentration of 1.0 mM to reduce the pH of said ...
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0answers
30 views

Unknown possibly handmade glassware- description in information below

Okay, Another random item from the cupboard (unknown users or discipline of life sciences unknown) could be anything up to 40 years old.... This appears to be a 2 neck quickfit adapter (B19 and B14) ...
4
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0answers
42 views

Solubility of PbSO4

The solubility of $\ce{PbSO4(s)}$ increase with the addition of $\ce{H2SO4}.$ Why? I don't quite understand this. When dissolving $\ce{PbSO4(s)}$ we get the equilibrium equation: $$\ce{PbSO4(s) <=...
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1answer
32 views

Equivant mass of double salt

What is the equivalent mass of double salt like dolomite? And what if the double salt is hydrated? Is a double salt taken as a single unit while equating the gram equivalent in any reaction? For ...
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1answer
41 views

Calculating molecular weight of an acid based on given values of mass, volume, pH and pKa

This is what I thought was an easy problem but according to a given answer I am doing it wrong: $\pu{11 mg}$ of a monoprotic acid was dissolved in $\pu{0.5 l}$ of water. The resulting $\mathrm{pH}$ ...
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0answers
49 views

Unknown glassware please help, vshaped with a small bulb on one side, hollow but narrow to both sides!

Looking to try an identify some glassware we have found in a cupboard. This is just the start of it... 1 item here, v-shaped, small bulb but hollow, narrow entrance and exit...
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1answer
415 views

Will heating of KClO3 be considered disproportionation?

In all examples of disproportionation I have seen, there is one particular atom whose oxidation state is both increasing and decreasing to give rise to different products For example, on heating ...
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2answers
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Unusual oxidation numbers for alkaline earth metals?

Are there compound of alkaline earth elements showing unusual oxidation numbers? For the sake of the question, every oxidation number different from +2 counts as unusual, most exciting would be ...
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3answers
108 views

CaSO4 precipitate in mixture of Na2SO4 and CaCl2 solutions

I have been stuck on a chemistry problem for a long time now and if anyone here can help me I would be eternally grateful. 40. Du tillsätter $\pu{100 ml}$ $\pu{0,01 M}$ $\ce{Na2SO4}$-lösning i $\pu{...
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0answers
27 views

Electron-donating trends for ligands bound to metal complexes

Imagine an inorganic complex with a bunch of terminal ligands. All else the same, would $\ce{F-}$ or $\ce{Br-}$ ligands be more electron-donating and why? Of course, in terms of $\mathrm{p}K_{\mathrm{...
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42 views

What is the electronic structure of Mn in KMnO4 and K2MnO4?

I know that is is d3s hybrid. But in my book it is unclear which orbitals participate in pi bond with O. I think it should be both p and d orbitals of Mn that do.
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2answers
45 views

Finding molarity of hyposulfite solution used in titration

$\pu{0.1 g}$ of $\ce{KIO3}$ is treated with excess $\ce{KI}$ solution. The liberated iodine required $\pu{44 ml}$ of $x$ molar hypo solution. Calculate the value of $x$. I have used the equivalent ...
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2answers
411 views

Reaction of borax with NaOH

How does borax react with NaOH? My textbook says that sodium peroxoborate is formed. I couldn't find the reaction anywhere else. Can anyone verify as well as explain it?
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1answer
32 views

Corrosion of iron: no electron pushing mechanism?

Why does the oxidation-reduction reaction between iron, water, and $\ce{O2}$ gas to form rusts lack an electron pushing mechanism and a specific sequence of steps? $$\ce{4Fe^0(s) + 3 O2(g) + 2n H2O(l)...
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1answer
63 views

Are there known compounds of caesium with oxidation number >1?

Given that the left neighbor of caesium, xenon, does have fluorides and oxides, it is not inconceivable that caesium can have oxides or fluorides with an oxidation number higher than 1. Are such ...
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0answers
8 views

What could cause foam formation in a Wet Flue Gas Treatment process ? (Desulfurization)

The process in question is a Desulfurization process operating in Close Loop mode. It means that the initial seawater is recirculated a given number of time in the process. In the mean time, a small ...
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0answers
37 views

Changing of UV-Vis peak absorption after heating Ni(en)2(NO2)2

(c) The trans-isomer of $\ce{Ni(en)2(NO2)2}$ D is red $(λ_\mathrm{max} = \pu{500 nm}).$ It can be heated to give a new trans-isomer E, which is violet $(λ_\mathrm{max} = \pu{560 nm}).$ Assume that, ...
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1answer
837 views

Why are low spin tetrahedral complexes so rare?

As I was going through Concise Inorganic Chemistry by J. D. Lee, I realised that there are simply no low spin tetrahedral complexes mentioned in the book. Is there any specific condition required for ...
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0answers
27 views

Applying Ligand Field Theory, How Can The Color Of Transition Complex Ions Be Explained/Represented?

1. To my understanding, Crystal Field Theory allows for an explanation for the colors of transition metal complex ions due to the d-d transitions which occur. This transition ∆o, is from the t2g ...
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1answer
73 views

Why doesn't N2O give a positive brown ring test?

A common nitrate test, known as the brown ring test can be performed by adding iron(II) sulfate to a solution of a nitrate, then slowly adding concentrated sulfuric acid such that the acid forms a ...
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0answers
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Why the second and third ionisation enthalpy of Bismuth is more than that of Antimony?

The first ionisation enthalpy values of Group 15 elements follows a descreasing trend due to increasing atomic size and metallic character but why the second and third ionisation enthalpy values ...
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46 views

Calculating pH of solution

What is the $\mathrm{pH}$ when you dissolve equal amounts of $\ce{NaHCO3}$ and $\ce{Na2CO3}$ in water? When both of the compounds are dissolved, we will have equal amounts of $\ce{HCO3-}$ and $\ce{...
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2answers
102 views

T-shaped and Seesaw geometry hybridization

Why are the filled orbitals s and px (in the T-shaped case) also part of the hybrid orbitals of the central atom in sp3d hybridization? In other words, why should the hybrid orbital not be a p3d, for ...
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0answers
28 views

Qualitative Analysis

What is the green solution that gives yellow precipitate when reacted with lead (II) nitrate and that gives a green precipate when reacted with aqueous sodium hydroxide ? I'm confused with this ...
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1answer
27 views

How does energy and speed affect sub-atomic particles (protons, neutrons, electrons) in an electric field [closed]

(Source: https://gyazo.com/a4d5beed3272a7ca793dd8e2f7e8be3c) I am having trouble understanding the problem above. Why does it matter if the particles are held at constant energy or speed? How does ...
7
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1answer
420 views

Do quaternary sulfur dications exist?

We know that sulfur can form sulfides $\ce{R2S}$, with two substituents bonded to it. The simplest example of this would be hydrogen sulfide. However, sulfur can also form sulfonium ions $\ce{R3S+}$,...
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2answers
59 views

Removing sodium borate for the test proving thiocyanate ions

I've just learned that when carrying out the identification test for thiocyanate ions borax can induce a false positive and therefore needs to be removed. I couldn't find the answer on google so I'm ...