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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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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trisilane engine
looking at the properties of trisilane, it seems like it would be suitable for use in an internal combustion engine, however, I have not been able to experiment with this. has anyone seen a trisilane ...
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41 views
Why are aluminum salts the most effective way to prevent sweating? [on hold]
Aluminum salts are used in antiperspirants to prevent sweating.
From what I have read so far, they work by forming a complex salt with water (mostly aluminum chloride hexahydrate) which is reacting ...
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finding x in FeSO4 xH2O [on hold]
FeSO4 xH2O contains 37.2% of water complete the calculation to determine x
1-Mass of one mole of H2O= 18g
2-Mass of water in 100g of FeSO4 xH2O= 37.2g
3-Number of moles of H2O in 100g of FeSO4 xH2O=...
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21 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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0answers
16 views
Sodium orthosilicate formation [on hold]
1-Can sodium metasilicate (Na2SiO3) react with sodium hydroxide (NaOH) to form sodium orthosilicate (Na4SiO4)?
2-How are orthosilicates (SiO4) made from silicon dioxide (SiO2) or metasilicates (SiO3)...
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1answer
32 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
29 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
288 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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13 views
Potassium alum powder, hydrogen peroxide, water and baking powder [closed]
I added these three in a bottle (out of nowhere) and it started bubbling. And when it subdued, the liquid was kinda hotter than normal (hydrogen perox) and my finger is kinda rough. So i want to know ...
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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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Can anyone explain the structure of H2XeO4?
Using the obselete VSEPR theory I had a hard time predicting the structure of H2XeO4. So I looked it up. This was what I found. Its kind of wierd to me. I can't see how it happened. Can anyone explain ...
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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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25 views
How to compare the |∆H| and |∆U| from each of the following reactions? [closed]
Can I do : |∆H| = |∆U| + ∆nrT ? Or do I need to evaluate the stability of the compounds from the reactions and then compare ∆U and ∆H ?
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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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Gibbs free energy of activation and activation energy
What the difference between Gibbs free energy of activation and activation energy
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0answers
40 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
27 views
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
641 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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Not able to understand CBSE class 12 chemistry [closed]
A month ago my studies for cbse class 12 started but I am not able to understand chemistry specifically Organic Chemistry.
One issue is that some of my my class 11th concepts are not clear.
Pls help ...
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0answers
51 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
41 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
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Bohr orbit of hydrogen [closed]
The energy of an electron in the first Bohr orbit of HH atom is −13.6 eV−13.6 eV. The possible energy value(s)(s) of the excited state(s)(s) for electrons in Bohr orbits of hydrogen is (are)
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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
41 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
29 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
39 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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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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0answers
11 views
Ester needed to replace Propylene Carbonate [duplicate]
I am looking for a clear ester to replace propylene carbonate that is not miscible in water, liquid at room temperature, safe to use for skin and hair and has a density of around 1.2 g/cm³?
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Why are some compounds like [Fe(NH3)6]2+ sp3d2 and not d2sp3 hybridized in spite of NH3 being a strong ligand? [closed]
Why are there so many exceptions in strongness and weakness of ligands? Sometimes H2O acts as strong field ligand and sometimes a weak field ligand. What is the actual reason behind this discrepancy? ...
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1answer
388 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
72 views
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
95 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
25 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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31 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
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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 ...
5
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2answers
377 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
31 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
61 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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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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36 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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Atomic hydrogen vs nascent hydrogen [duplicate]
Atomic hydrogen is more powerful reducing agent than nascent hydrogen. Is there a chemical reaction to show that? Edit: the duplicate one actually didnt solve my problem.
Actually many comments are ...
10
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1answer
814 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
22 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
68 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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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 ...
