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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Why is HgI2 a colored complex?

Why is $\ce{HgI2}$ a colored complex it has fully filled d-orbits. According to the book, one which has fully filled d-orbital has no color in transition elements. So, why is this compound colored?
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Moles question that I need help on pls [closed]

So the question is: o.o497g of a chloride of a group 1 metal called Z is dissolved on water, Excess acidified silver nitrate solution is added to the solution. The resulting precipitate is filtered ...
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How is [AlF6]3- formed? [closed]

So I was just looking at the orbitals and expanded octet concepts of Al. And I'm not able to understand how Al uses the d orbitals to form this compound... Could someone explain this to me using the ...
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Why does this formula work?

My teacher gave us a formula for determining if a M-O-H like compound will act like a base or not.without explaining much. Base if:$$|\chi_o-\chi_M|\gt|\chi_o-\chi_H|$$ Flipped inequality if acid. I ...
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Question on d block contraction

For size trend down a group, it is known that:$$Al\gt Ga$$ Due, to d block contraction of gallium. Why isn't this the case when it comes to silicon and germanium? Won't the poor shielding effect from ...
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Write the reducible representation of TiCl6 3- [closed]

Write the reducible representation for 4 cl in the equatorial position and 2 cl in the axial position separately. I am not sure how to do this seperately. Please help
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How to find the oxidation number of Co and Cr in [Co(NH3)6] [Cr(C2O4)3]?

In the question I actually got I had to name the above compound, and I know how to name it but I don't know how to find the oxidation number of the above compound(which has to be mentioned in the ...
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I need some help to understand the question about Crystal field [closed]

A Mn(IV) impurity is introduced substituting Ti in Perovskite (CaTiO3, see cif.file). Without taking into account bielectronic d-d interactions, can you provide of a qualitative diagram of the ...
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A question about inorganic chemistry [closed]

I tried to use many methods to solve this problem, but encountered a lot of difficulties, I would like to ask you how to solve this problem better, thank you
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Driving force of Galvanic cell

Work can be extracted from galvanic cell which has a negative Gibb's free energy. I was wondering what is the driving force of it: I would naturally think its the Gibb's free energy, but the gaps ...
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Will a polymer exchange membrane work with chlorine and hydrogen instead of hydrogen and oxygen? [closed]

I want to feed chlorine and hydrogen from an electrolysis reaction (using water and sodium chloride) and in turn feed the product (hydrogen chloride) back into the electrolysis water to counteract the ...
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Why Ammonium bifluoride is used in the iodometric estimation of copper in brass?

When brass solution (mixed with nitric acid and urea) is to be estimated for amount of copper present, ammonia is added to neutralize the solution. This gives a turbidity which can be dissolve by ...
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Rydberg states above the first ionization threshold [closed]

What does "rydberg states above the first ionization threshold" mean?
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Which metal bicarbonates do not exist in solid state?

$$\ce{(i) LiHCO_3 (ii) Ca(HCO_3)_2 ​ (iii) Zn(HCO_3)_2 ​ (iv) AgHCO_3}$$ From my prior knowledge compounds i and ii are not solids because of the high hydration energy of Li and the ...
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Is bthis found another way to explain the bond angle of water [closed]

The hydrogen bond with oxygen has an angle of 104.5 degrees instead of the terahedral angle of 109.5 degree. Can this be explained as hydrogen bonds pulling the hydrogens gtogather?
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Inorganic chemistry problem [closed]

Estimate the volume of methane gas needed to bring the water in a 1L kettle to the boil, considering it takes about 4.18 kJ to increase the temperature of 1L of water by 1 degree celsius and that 1 ...
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AlCl3(aq) reaction with NaHCO₃ to form alumina Al2O3

In a demonstration, aluminum foil was add to a solution of $\ce{HCl}$ and allowed to react, the reaction was presented as $\ce{2Al(s) + 6HCl(aq) -> 2Al­Cl3(aq) + 3H2(g)↑}$ After filtration, the ...
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What is the general formula for the formal charge for the end oxygens for carbonate and ozone? [closed]

In CO3 2- (carbonate), there are three possible resonance structures. Each of the three oxygen atoms carries a formal charge of -1 in two out of the three structures. This averages to approximately -2/...
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Extracting other mineral from salt in evaporated seawater

I recently stumbled upon this news: Seawater contains 47 minerals and metals. Starting with the most abundant and proceeding to the least abundant, these are chloride, with a concentration of $\pu{18 ...
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Is iron(iii) hydroxide equivalent to hydrated iron(iii) oxide? [duplicate]

Are the chemicals $\ce{Fe(OH)3}$ and $\ce{Fe2O3⋅3H2O}$ equivalent? They are both network solids and have the same empirical formula but I know that doesn't always mean they are structurally the same.
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Transition contraction for D series [closed]

My teacher told me that transition contraction is followed by 4d as well as 5d series like in 3d series where at first z effective dominates the shielding effect but then the comes almost equal and ...
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Why is boron inert to acids and bases? [duplicate]

I was reading my school text book and in the segment related to the reactivity of group 13 elements with acids and alkalis it was written: Boron does not react with acids and alkalis even at moderate ...
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Hydrolysis of Magnesium Carbide

I came across a question in which the following reaction was taking place: $$ \ce{Mg4C3 + H2O -> CH3CH \bond{#} CH} $$ Each $\ce{Mg}$ atom must be present in a +2 oxidation state, thus the total ...
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Thermal properties of aluminium alloy 6063

I am looking for the operating temperature range both in a cold and hot environments (minimum and maximum operating temperatures) for aluminium alloy 6063. I'm new to finding this kind of information ...
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Why is acid added to water and not vice versa for dilution? [duplicate]

what makes the process of addition of water to acid so exothermic that it becomes explosive, and why adding acid to water is lesser exothermic?
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Basic behavior of ammonia in aqueous medium

Thanks to the reversible reaction $$\ce{NH3 + H2O <=> NH4+ + OH-},\tag{R1}$$ we know that ammonia acts as a weak base. However, I was wondering why it ends up forming ammonium $\ce{NH4+}$ and ...
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Sodium peroxide and its properties

Sodium peroxide is a strong oxidizing, but when it is added to an acidified dichromate solution then already chromium is present in its highest oxidation state so the color of the solution shouldn't ...
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Chemical analysis of soapstone

Soapstone is a metamorphic mineral with a number of constituent compounds including principally: silicon dioxide magnesium oxide iron oxide aluminum oxide calcium oxide water/carbon dioxide What ...
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Acidic KMnO4 oxidizes H2S to S. Why doesn't the oxidation proceed further to sulfur oxide, sulfur dioxide or sulfur trioxide?

I have some idea about the question. I think it has to do with oxidation/reduction potentials but I am not able to find any resource for the exact values or how to make sense of them in this context. ...
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What are the reaction products in my dishwasher from a steel colander?

In my dishwasher I noticed that a steel colander and a coffee maker (the Moka Pot) both became discolored after being in the dishwasher. The metal is clearly reacting with something. They aren't made ...
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Why isn't osmium ferromagnetic?

When I am studying magnetic properties in IB Chemistry, what particularly puzzles me is ferromagnetism. In my textbook, what accounts for paramagnetism in transition metals is unpaired electrons in ...
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Lewis dot structure of H3NF2 [closed]

Consider a hypothetical compound $\ce{H3NF2}$. What will be its Lewis dot structure? I'm stuck, since Nitrogen cannot exhibit pentavalence, or at least its not stable (unlike phosphorous in $\ce{H3PF2}...
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How to make the correct answer to show up in the response section? edited

I need some help with editing Stack question concerning chemistry. It is quite a simple question. Here's the link to the folder, in which you can see the whole question in screenshots: https://drive....
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Crystal Field Splitting Energy and Metal Energy Level

Second and third row metals are stated to often have higher crystal field splitting energies than first row metals. The argument is usually made that the more diffuse 4d and 5d orbitals are capable of ...
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Explanation for a basic decomposition of water experiment

My son is trying to write a conclusion for a basic decomposition of water experiment using a 9 V battery (with a test tube placed over each terminal) placed inside a salt water solution. The results ...
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Two non-metallic elements react in 1 : 3 ratio to give another gas X [closed]

Two non-metallic gaseous elements react in $1 : 3$ ratio to give another gas $X$. A mixture of $X$ and oxygen is taken in a jar and a burning matchstick is introduced into it. Another sample of the ...
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Geometry of the transition metal complex in solid dipotassium bis(oxalato) copper(II) tetrahydrate

I was thinking of the geometry of the transition metal complex in solid $\ce{K2[Cu(ox)2] · 4 H2O}$ solid around the $\ce{Cu(II)}$ ion. At first I thought square planar, but is it possible or is there ...
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Bond dissociation energy for polar molecules

This formula relates to how Pauling determined the values for electronegativity for all the elements and how delta (if big) shows that the molecule is very polar. Delta being: $\Delta =\Delta H\left(...
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Can a weak acid react to give a stronger acid? [closed]

I was trying to understand why $\ce{AgCl}$ does not dissolve in $\ce{HNO3}$ and the reaction I could think of was something like this: $$\ce{AgCl + HNO3->AgNO3 + HCl}$$ I could not understand why ...
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Molecular Orbital Theory and s-p mixing

I understand the bulk of MO theory , the formation of the bonding and anti bonding MOs etc. However, the topic about s-p mixing is quite puzzling to me. As a general rule of the thumb, I was taught ...
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KMno4 is the strongest oxidizing agent. So why does it tend do have +2 oxidation state with reaction with acids? [closed]

Manganese has an oxidation state of +7 in potassium permanganate. When reacted with sulphuric acid, how does it tend to have +2 oxidation state by forming $\ce{MnSO4}$ along other products ? In acid, ...
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Molecular orbital diagram for carbene-metal and carbodiphosphorane-metal interaction

I am interested in understanding how carbenes and carbodiphosphoranes interact differently with a transition metals. I would like to use qualitative molecular orbital theory arguments (with an ...
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2answers
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MO diagram when three orbitals of the same symmetry is allowed to mix

How exactly should we combine three orbitals when we have three orbitals that are of correct symmetry to interact? Take $\ce{H2O}$ for example. $\mathrm{2s},$ $\mathrm{2p}_z$ and the $A_1$ group $(\ce{...
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Why is the aluminium boiling point higher than silicon? And why is silicon's melting point higher than aluminium?

Why is the Aluminium boiling point higher than silicon? And why is silicon's melting point higher than aluminium? $\ce{Si}$ has 4 bonds which are covalent in nature. $\ce{Al}$ is metal thus possesses ...
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how to separate a mixture of sodium chloride and sodium hydroxide

I recently did an double displacement reaction in that I have formed a solution of water with sodium hydroxide and sodium chloride are dissolved in it. now I want to separate both of them
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How do I go about solving this question? [closed]

So I've studied Redox concepts but in the exam we are asked questions like these. How am I supposed to know what the reaction is going to be? How do I go ahead and assume what oxidation state it's ...
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Why is melting point of Vanadium higher than Iron? [duplicate]

The iron is found to have four unpaired electrons while vanadium has 3 of them. we say the binding energy is directly proportional to number of unpaired electrons and hence number of metallic bonds ...
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1answer
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Why can't iodide be oxidised to iodate in acidic medium?

Even if we use a strong oxidising agent like 'permanganate ion in acidic medium' it doesn't help oxidise iodide to iodate, but a relatively weaker oxidising agent 'permanganate ion in alkaline medium' ...
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Is there an 'easy' way to determine if a ligand is a pi acceptor, donor or neutral?

First of all I am confused how something can be pi neutral? something either does or doesn't have filled p orbitals for example. given something I have never seen acting as a ligand before like ...
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Which is more stable: Ortho or Para Hydrogen? [duplicate]

It is known that Para-Hydrogen has opposite spin and Ortho-Hydrogen has same spin. Therefore, the energy of Para-Hydrogen is lower than that of Ortho-Hydrogen. Therefore, the stability order should be:...

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