Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

3
votes
0answers
80 views

Comparing thermal stabilities of MgCl2 and BaCl2

I read that to compare thermal stabilities of ionic solids: if the solid has a monoatomic anion, we compare thermal stability on the basis of lattice energy which is inversely proportional to size. ...
0
votes
1answer
66 views

What is a “tri-salt polymer” as described by this product that eliminates and prevents mold?

This answer mentions an anti-mold product called Concrobium Mold Control. The FAQ linked on their website says: Q: I see Sodium Carbonate listed on the label. Is Concrobium Mold Control just Sodium ...
2
votes
1answer
64 views

Does hydrogen peroxide in basic medium only give oxygen gas on oxidation?

Does hydrogen peroxide on oxidation gives oxygen gas only in basic medium? I thought that was true but I read about these reaction of $\ce{H2O2}$ in acidic medium: $$\ce{2MnO4- + 6H+ + 5H2O2 -> ...
1
vote
1answer
75 views

Chloroantimonic v/s fluoriantimonic

Does chloroantimonic acid exists like . If not , than why , what we get when we mix hydrochloric acid and antimonypentachloride and can we predict its acidic strength if it would ever be synthesized. ...
2
votes
1answer
264 views

How is silver chloride more soluble in brine than water?

I heard that: Silver chloride is more soluble in very concentrated NaCl solution (brine) than in pure water. Is it true? I mean won't the common ion effect operate? Or may be this is due to some ...
-1
votes
1answer
30 views

What is (if there is) the reaction between manganese chloride and oxygen when dry?

I had a chemistry lab and I did a error. I was supposed to make some $\ce{MnCl2}$ and then used fire to dry it but then some of it turned black, and I am supposed to quantify my error. So I am ...
11
votes
2answers
3k views

What is the strongest oxidising agent? [closed]

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, ...
0
votes
0answers
72 views

Acid HClF6 and HIF6

I was wondering about $\ce{HClO4}$ which is a very strong acid . I thought it can be made stronger by replacing $\ce O$ with $\ce F$ to make $\ce{HClF6}$ but didn't find its existence . I thought that ...
-2
votes
2answers
42 views

Uses of Chlorine [closed]

Why in the reaction between sodium chlorate and water is chloric acid produced as well as Na+ and OH- ions. Shouldn't both the ions just react to produce NaOH?
-1
votes
1answer
57 views

Memorizing chemical equations [closed]

Is there's an easy or at least a practical solution for memorizing chemical equations? I'm currently in grade 12 and we're studying a whole chapter about Iron and how to prepare it, starting from the ...
1
vote
1answer
134 views

why is NaOH used instead of KOH for preparation of K2Cr2O7?

I have been told by my teacher that we use NaOH for the first step of preparation of potassium dichromate to form sodium chromate, which then reacts with conc H2SO4 to form sodium dichromate. Then it ...
-1
votes
1answer
19 views

Ionisation energy is lower for higher energy shell?

Why does an electron in a higher energy orbital require less energy to remove it? Wouldn't it be harder to remove an electron from a higher energy orbital when compared to a lower energy orbital?
3
votes
1answer
88 views

Stability of 3d metal fluorides and iodides in different oxidation states

I read that the fluorides of 3d metals in lower oxidation states, e.g. $\ce{VF2}$, $\ce{TiF2}$, and $\ce{CuF}$ are thermodynamically unstable. For example, $\ce{CuF}$ disproportionates to $\ce{Cu + ...
3
votes
2answers
100 views

Acids of noble gases

Are there any other acids of noble gasses besides xenic acid? Why other ones seem to be very unstable (like perxenic), or completely unknown (acids of any other noble gases). Particularly are there ...
2
votes
1answer
61 views

Do polyfluorosulfuric acids like H2SO2F4 exist?

I was thinking about a compound resembling $\ce{H2SO4}$ but more acidic. I thought to replace the 2 oxygens with 4 fluorine atoms getting $\ce{H2SO2F4}$, which might be more acidic. Does such a ...
1
vote
1answer
161 views

Second ionization energies of copper(Cu) and silver(Ag)

The ionization energies of copper and silver are First ionization energy: Cu-745.5 kJ/mol Ag-731.0 kJ/mol Second ionization energy: Cu-1958 kJ/mol Ag-2073 kJ/mol Now, looking at the ...
3
votes
1answer
989 views

Full equation when using vinegar, hydrogen peroxide, and salt to etch copper

What is the full chemical equation when you use the following reactants to etch copper: vinegar / acetic acid (5%) $\ce{CH3COOH (aq)}$ hydrogen peroxide (3%) $\ce{H2O2 (aq)}$ salt $\ce{NaCl (s)}$ ...
1
vote
1answer
58 views

What's the reaction between H2SO4 and NaH2PO4?

I'm guessing it's going to be $$\ce{H2SO4 + 2 NaH2PO4 -> 2 H3PO4 + Na2SO4}$$ Could anyone please let me know what the actual reaction is? Thank you
4
votes
0answers
160 views

Why is gunpowder urinated on in Blood Meridian?

An interesting section of Blood Meridian (1985) by Cormac McCarthy has the gang of "Indian fighters" surrounded and out of powder, so one of them manages to make it from scratch, making charcoal from ...
0
votes
1answer
38 views

How does a molecule find the lowest energy state? [closed]

I understand that in a crystal lattice the molecule will tend towards the structure that is the lowest in energy (fcc, hcp, ccp, etc.). How does the molecule find these lowest energy states? Is it ...
1
vote
1answer
119 views

Finding mass percentage of components of a solid mixture

A workbook question asks: $\pu{2.184g}$ of a solid mixture containing only $\ce{K2CO3}$ ($\mathrm{FW = 138.2058}\pu{ g/mol}$) and $\ce{KHCO3}$ ($\mathrm{FW = 100.1154} \pu{g/mol}$) is dissolved in ...
6
votes
1answer
594 views

Why does ozone have higher entropy than oxygen?

$$\ce{3O2(g) -> 2O3(g)} \qquad \Delta H^\circ (\pu{298 K}) = \pu{+142 kJ mol^-1}$$ Since the RHS of the equation contains less number of gaseous molecules, naturally I expected the $\Delta S$ to ...
1
vote
1answer
107 views

The reaction of iron with sulfur to produce Iron(II) sulfide is inconvenient (for me)

I am taking a lot of iron properties this semester, but I have found some contradicting piece of information about the reaction of iron with nonmetals illustrated with two cases \begin{align}\ce{ **...
-1
votes
1answer
96 views

Balancing the reaction of nitric acid with zinc using oxidation number method

In a previous question, there was confusion relating to what this "oxidation number method" is. So I will illustrate that before my question. Write the skeleton equation representing chemical ...
9
votes
1answer
112 views

How can the solid state structure of cyclopentadienyllithium be explained?

In the solid state, LiCp adopts a polymeric multidecker structure where Li atoms are sandwiched between two Cp rings (shown in this diagram from Organometallics 1997, 16 (17), 3855–3858): If we ...
2
votes
0answers
186 views

Order of covalent character of lead halides

According to Fajans' rule, larger the size of anion more is the covalent character. But why is $\ce{PbF2 > PbCl2 > PbBr2 > PbI2}$ the order of covalent character?
1
vote
1answer
57 views

Molecular electronic state symmetry

I am trying to work out the ground state symmetry of electronic states. The paper states the GS symmetry is $^6A_1$ for the right hand side electron configuration and $^4B_1$ for the LHS in the D$_{2\...
1
vote
0answers
105 views

Why do d8 metals prefer to form complexes with a square-planar geometry?

Why do d8 metals prefer to form complexes with a square-planar geometry while those with a tetrahedral geometry have less steric hindrance?
-1
votes
1answer
43 views

Will reaction of hydrogen sulfide + copper chloride/potassium chloride occur and why?

I'm pretty new to chemistry and came across a last year's chemical olympiad in our country and I got stuck on this (I tried googling this problem but after a half of hour I gave up): Will these ...
2
votes
1answer
268 views

Is cobalt(II) in the hexaamminecobalt(II) complex high spin or low spin?

I want to determine the electronic configuration of $\ce{Co}$ in $\ce{[Co(NH3)_6]Cl2}$ with Crystal Field Theory. I know that since the complex is octahedral, there would be degeneracy breaking and ...
1
vote
1answer
94 views

PCl3 vs SCl2 boiling point

Why does sulfur dichloride have a lower boiling point than phosphorus trichloride? Is it to do with the higher number of electrons causing stronger id-id interactions in PCl3, or do we need to compare ...
0
votes
1answer
28 views

Why do lattice structures form into powders?

For example, when you react magnesium with oxygen over heat, it forms a lattice of ions. Why does a strong lattice of ions like MgO turn out to be a powder, rather than a solid block? (Sorry if the ...
1
vote
0answers
38 views

Stable oxidation state for Thallium and indium

The first Ionisation Enthalpy for Thallium is ~ 590 KJ/mol whereas that for Indium is ~ 558 kJ/mol. But why is +1 oxidation state more stable for Tlthan In? What are the other criteria that explain ...
0
votes
2answers
96 views

How do you handle manganese nitrate hexahydrate?

So I wanna do an experiment using manganese nitrate and I bought manganese (II) nitrate hexahydrate $\ce{Mn(NO3)2.6H2O}$. But when I received it, it was kinda watery already (most part is still ...
1
vote
0answers
26 views

π-backbonding in tungsten complexes

I need to find in which of the following complexes the M-CO bond is stonger: [WO3(CO)3] and [W(CH3)3(CO)3]. According to my knowledge this is chiefly determined by the π-backbonding and how good ...
0
votes
1answer
22 views

How to evaluate a non-ionized compound activity coefficient? [closed]

I know that the activity coefficient of compound such as $\ce{NaHCO3}$ is greater than unity averaging 1.13 for seawater ionic strengths, but how can we evaluate this value?
3
votes
0answers
111 views

Help understanding the pi-properties of the NCS- ligand

Course knowledge When considering the NCS- ion, I take all atoms to be sp hybridized. This means that there are 8 electrons that are accommodated in the $\pi$-system. There are two orthogonal 3-...
2
votes
1answer
34 views

How to determine net charge of a polycation using Wade's rules?

In order to determine the net charge of polycations, which adopt a Wade-like structure (octahedral, trigonal bipyramidal, ...), Wade's rules can be used. For example, the charge $x$ of the ...
4
votes
1answer
94 views

Melting of ionic compound hydrates

My professor asked us the reason of the melting point of potash alum being so low, despite it being an ionic salt. He later went on to answer it by saying that melting point is a misnomer for the ...
1
vote
0answers
18 views

Why does aluminum in zeolites form tetrahedras? [closed]

It forms a bond with four oxygen atoms even though it has only there electrons in his outter shell?
0
votes
1answer
54 views

Hybridization and excitation of electrons, how is it possible?

When studying the structures of molecules by hybridization why we take into consideration of excitation of electron if the excited electron only stays in the upper shell by absorbing for only 10^-8 ...
2
votes
1answer
74 views

How do we know that we have isolated a substance?

In The Historical Background of Chemistry by Henry M. Leicester page 131, the author says: Carl Wilhelm Scheele (1742-1786) [...] isolated many organic compounds, including hydrogen cyanide, lactic,...
2
votes
1answer
56 views

Understanding energy level splitting of an octahedral complex from spin-orbit coupling, 1st and 2nd order zeeman effects [closed]

While studying notes from a couple years ago, I encountered a diagram that I don't have further information on but would like to understand. While I believe I managed to find sources to guide me ...
-2
votes
1answer
69 views

Inorganic reactions related to nascent hydrogen [closed]

My Question: My attempt: I know that option (A) & option (C) are correct option. But don't know about option (C) and in the answer all of them are correct. Can someone provide the ...
4
votes
1answer
107 views

Why does carbon not form 3 pi bonds?

Why doesn't carbon form 3 $\pi$ bonds? If s-s overlap is possible between 2 carbon atoms,then it will be possible for 3 p orbitals to overlap laterally .
1
vote
0answers
63 views

How to decide if a salt is soluble in water through mere pen and paper [closed]

In the laboratory we are given numerous salts for analysis for cation and anion. How can one decide which combination of cation and anion cannot form soluble salts in water so that after detecting an ...
6
votes
1answer
312 views

Why can't NH5 form?

In ammonia a nitrogen atom forms 3 covalent bonds with hydrogen atoms and has one lone pair which can be used in a dative covalent bond with another hydrogen atom to form an ammonium ion. Instead of ...
-1
votes
1answer
45 views

Nickel-63 and surge protector / voltage regulator

I've read that nickel-63 is used in surge protectors and voltage regulators. What is it about nickel-63 that makes it particularly suitable for those applications?
-3
votes
2answers
158 views

What is reduced and oxidized when potassium bromate reacts to oxygen and postassium bromide?

I'm trying to help lead my daughter to a solution and my high school chemistry is almost 30 years ago. For the following reaction, indicate the species being oxidezed and reduced and show the ...
1
vote
0answers
55 views

Why does Cu not react with dilute H2SO4? [duplicate]

$\ce{Cu + (dil) H2SO4 -> No Reaction}$ but $\ce{Cu + (conc) H2SO4 -> CuSO4 + SO2 + H2O}$ What is the difference between the dilute and concentrated acid that one reacts but the other doesn't?...