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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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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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1answer
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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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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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How well will molten iron chrysolite (fayalite) react with hydrogen?

The equation balances nicely, but would the reaction tend to proceed this way? What temperature and time would be needed? $\ce{Fe2SiO4 + 2H2 -> 2H2O + 2Fe + SiO2}$ There is no problem with ...
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Considering the d-d transition how, does tetracyanidonickelate(II) ion exist as a colored complex?

As I refer on google, the resources indicated that, the d block elements which have unpaired electrons as in their ions, when they are making complexes with ligands, they can absorb different ...
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4k views

What is the strongest oxidising agent?

I searched for the strongest oxidising agent and I found different results: $\ce{ClF3}$, $\ce{HArF}$, $\ce{F2}$ were among them. Many said $\ce{ClF3}$ is the most powerful as it oxidises everything, ...
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581 views

Mechanism for Chromyl Chloride Formation

This is the very famous chromyl chloride test, used for detection of chloride ion in solution - $$\ce{K2Cr2O7 + 4NaCl + 6H2SO4 -> 2CrO2Cl2 + 2KHSO4 + 4NaHSO4 +3H2O}$$ When a mixture containing ...
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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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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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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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What makes Gorilla Glass more durable with each generation?

Gorilla Glass (GG) is one of the most recognizable brands of toughened glasses today, thanks to their marketing and widespread usage in various gadgets and automobile industry. According to Wikipedia,...
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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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343 views

Calculating yield percentage of magnetite synthesis

I’ve made magnetite $\ce{Fe3O4}$ in the lab and now I need to calculate yield percentage. How can I do it? I have these data. \begin{align} \ce{FeSO4.7H2O(aq) &-> Fe^2+(aq) + SO4^2- (aq) + ...
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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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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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Potassium alum powder, hydrogen peroxide, water and baking powder [on hold]

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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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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3answers
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Which “exotic salt” can lower water's freezing point by 70 °C?

The Medium.com article Mars Phoenix Lander, 10 Years Later shows several remarkable images and discoveries on Mars by the Mars Phoenix Lander circa 2008. One image (shown below) shows what looks like ...
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2answers
284 views

Can olivine be used to make glass?

This concerns ongoing work to find a plausible approach to large-scale production of clear glass on the Moon. It's for an ultra-hard science fiction project and I really want to get it right. Olivine ...
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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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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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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
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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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Why do nitrogen molecules not act as ligands in haemoglobin?

Nitrogen molecules $(\ce{N2})$ have lone pairs, which, as far as I know, is the property of oxygen molecules $(\ce{O2})$ that allows them to act as ligands bonding to iron in haemoglobin in the blood. ...
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1answer
546 views

What is the difference between a ligand and a co-ligand?

I've seen the word co-ligand pop up in several papers. Is there a particular difference between a co-ligand and a ligand?
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Can you have addition polymerisation with monomers other than alkenes?

Every example of addition polymerisation I have seen so far has used alkenes as the monomers. I was wondering if it is possible to have some other molecule. I don't think the following molecule can ...
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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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What is meant by the term addition product? What are it various types? Isn't dot (.) used to denote such compounds? [duplicate]

I've heard of addition products like hydrates etc., I also know a dot (.) is used to denote it... I don't what it means exactly though. I guess it's just a general way of describing addition products ...
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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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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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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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1answer
71 views

Terminology for describing nuclei participating in metallic bonds

I've read many times that in metals (for example sodium metal), what constitutes the crystal lattice is an arrange of atoms, since no electron is given or lost, they are just shared between all the ...
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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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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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1answer
48 views

Making hard water

Does anyone know how to make hard water with a hardness of 200+ ppm in terms of $\ce{CaCO3}$? I live in Seattle and we have very soft water and we need hard water for testing purposes. Obviously you ...
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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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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) ...
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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
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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2answers
38 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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1answer
432 views

Is there any difference between negative electron gain enthalpy and electron affinity?

According to electron affinity, it is the amount of energy "released" during the addition of an electron in the valence shell of an isolated gaseous atom, and its sign convention is opposite to that ...
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2answers
167 views

Oxidation states of boron

I have just been looking at https://en.wikipedia.org/wiki/List_of_oxidation_states_of_the_elements and found that boron has a -5 oxidation state. I would like to know which boron compounds form ...
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2answers
71 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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0answers
47 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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0answers
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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?