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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3answers
14k views

How many tetrahedral and octahedral holes are there in a bcc unit cell?

When I tried to count, I found 24 tetrahedral holes (each formed by 2 body centers of 2 unit cells sharing a face and 2 vertices of the same edge of that face). As each hole is being shared by 2 unit ...
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0answers
209 views

What is the correct electronic configuration of darmstadtium?

Some of the places, the electronic configuration of darmstadtium ($\ce{Ds}$) is given as $\mathrm{6d^9 7s^1}$ while at some other places, it is $\mathrm{6d^8 7s^2}$. Which among the two is correct?
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Radius of hydride (H⁻) ion

What is the radius of the hydride $(\ce{H-})$ ion? There are several sources with conflicting reports on the same. Inorganic Chemistry: Principles of structure and Reactivity cites Pauling’s 1960 ...
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1answer
850 views

Trends in solubility of group 2 nitrates

In my lab report, we are required to explain the trends in solubility of group 2 salts, going down the group. I had explained all of the trends except one, group 2 nitrates. The following is the data ...
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2answers
267 views

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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164 views

Why is it difficult to measure the pH of environmental water samples accurately (near 7)?

I've read in several places (edit: 1, 2, 3, 4, 5, 6, 7, 8. 9, 10, 11, 12) that there are many practical factors that make accurate pH measurements of roughly neutral environmental water samples more ...
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57 views

Oxygen generator, heat driven, from air

What chemical can be used to absorb $\ce{O2}$ from the air at normal temperature and pressure, then release the $\ce{O2}$ at normal pressure and elevated temperature, below $\pu{900 ^\circ C}$ ($\pu{...
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61 views

Why does B12H12 Borane not exist? [duplicate]

Whenever I searched "$\ce{B12H12}$ Borane", I can't seem to find anything, and get met with only the dianion of $\ce{B12H12}$. Why doesn't $\ce{B12H12}$ exist on its own?
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1answer
176 views

Chloroantimonic vs fluoroantimonic acid

Does chloroantimonic acid exists? What do we get when we mix hydrochloric acid and antimony pentachloride and is the mixture stronger or weaker than fluoriantimonic acid. How about bromo and ...
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1answer
96 views

Software for determining symmetry elements and point group of drawn molecules

The title represents my overall question. I would like to have a software that able to draw molecules (especially coordination complexes) and determine the symmetry elements and point group of the ...
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2answers
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Reaction of Boron with Alkali

In one of my books it is written that boron does not react with alkali but in another book it is written that it reacts with alkali. Can any one help in clearing this confusion?
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1answer
117 views

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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1answer
309 views

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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1answer
47 views

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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3answers
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Potassium chlorate from potassium chloride and hydrogen peroxide

Why can't you make potassium chlorate using the chloride anion from the potassium chloride and having oxygen bond with it from hydrogen peroxide?
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1answer
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Salt analysis of Ag salts

So I was doing analysis of Ag salts and I found Agbr is curry white partially soluble in ammonia , AgI is yellowish and insoluble . BUT silver phosphate is also yellow . So can anyone tell whether or ...
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2answers
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Why ammonium hydroxide precipitates metal salts?

When I was going through the chapter on pnicotgens, I got to know that ammonia acts as a Lewis base and it dissociates in water giving out hydroxide ion and the further hydroxide of ammonia, which we ...
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0answers
26 views

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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1answer
198 views

Electride salt preparation

In preparation for the Birch reduction, I am trying to prepare an electride salt, $\ce{[Na(NH3)6]+, e-}.$ This salt should be brilliant blue, as far as I know, but I am getting a black sludge when ...
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19 views

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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1answer
416 views

Why my boiling pot turned black?

Recently I ran out of dish washing detergent, so I decided to pick up one of the recipes online, to make my own "ecological" dish washing detergent alternative. The recipe was: Mix ingredients: ...
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46 views

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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1answer
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Homemade “milk of magnesia” (suspension of magnesium hydroxide in water)

I want to make homemade "milk of magnesia" as a suspension containing only magnesium hydroxide and water. I see that I can purchase a bag of magnesium hydroxide powder. Can I use this to ...
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33 views

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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1answer
58 views

Differences in using molten NaCl compared to aq. NaCl in a galvanic cell having copper anode and cathode

Since we know that copper anode will release $\ce{Cu^2+}$ ion, so I was wondering whether the cathode will thicken as copper has a lower position on the electrochemical series. Based on my research, I ...
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1answer
58 views

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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1answer
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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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59 views

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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2answers
40 views

Thermal properties of aluminium alloy 6063 [closed]

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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38 views

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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72 views

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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1answer
47 views

Basic behavior of ammonia in aqueous medium [closed]

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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2answers
108 views

How can one reclaim isotopic cadmium from a solution of acid, i.e. H2SO4 or HCl etc.?

I have dissolved isotopic cadmium-114 with $\ce{H2SO4}$ and or $\ce{HCl}$. Now that I have the cadmium-114 in solution, precipitating out $\ce{CdSO4}$ and or $\ce{CdCl2}$, how can I reduce these ...
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32 views

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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1answer
174 views

Strength of OH bond

This question might seem a little general, but how can we know the strength of the OH bond of third period element hydroxides? Does it increase across the period or does it decrease?But more ...
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2k views

Lithium chloride is soluble in pyridine while other lithium halides are not. Why?

Lithium chloride is soluble in pyridine while other lithium halides are not. Why? I know that lithium chloride is deliquescent like magnesium chloride. Lithium halides are covalent and thus are ...
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1answer
45 views

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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1answer
102 views

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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1answer
35 views

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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0answers
23 views

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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1answer
3k views

Thermal stability of interhalogen compounds

I am striving over the question that what would be the stability order of the following interhalogen compounds : $\ce{ClF3, BrF3}$ and $\ce{IF3}$. One probable answer I got is that stability of ...
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4answers
456 views

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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1answer
1k views

Use of cryolite and fluorspar in electrolytic reduction of pure alumina by Hall-Héroult process

Cryolite $\ce{(Na3AlF6)}$ and fluorspar $\ce{(CaF2)}$ are added to alumina to lower the temperature of the mixture from $\pu{2000 °C}$ to about $\pu{900 °C}$ and also to increase the conductance. But ...
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2answers
78 views

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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1answer
46 views

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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0answers
33 views

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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3answers
871 views

What is the equation for the reduction of water? [closed]

I'm a grade 12 student trying to understand redox reactions. What's the equation for the reduction of water? The back of my textbook says: $\ce{2H2O + 2e- -> H2 + 2OH-}$ I get that this makes sense,...
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0answers
51 views

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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2answers
4k 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
41 views

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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