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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23 views

Stability of radium oxide

Why is radium oxide yet to be isolated when a wide range of other radium (II) compounds are known ?
4
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0answers
46 views

Electrochemistry galvanic cell problem

A galvanic cell consists of a standard hydrogen electrode and a copper electrode. $$\begin{alignat}{2} \ce{2 H+ (aq) \;&<=> H2 (g)}\quad &&E^\circ = 0.00\ \mathrm{V}\\ \ce{Cu^2+ ...
7
votes
1answer
44 views

Predicting relative solubilites of salts without Ksp values

Is there a way of comparing which salt is more soluble without knowing their $ K_{sp}$ data or performing experiments? For example, comparing $\ce{Hg2Cl2}$ and $\ce{Cr2(SO4)3}$. I am not sure ...
5
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2answers
45 views

Calculating the number of ligands of complex ions in d- block

How do you know the number of ligands surrounding a metal ion? e.g. the obtained complex of $\ce{Ni^2+}$ ion in $\ce{NH3}$ solution is written as $\ce{[Ni(NH3)6]^2+}$ but $\ce{Cu^2+}$ in $\ce{NH3}$ ...
-6
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1answer
49 views

salary of research assistant in chemistry [on hold]

I know this is off topic question. But, can someone please help me with my situation, I have a B.S degree in Chemical Biology at a well-known university and I have 1+ year research experience in ...
5
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1answer
117 views
+100

Water exchange at Al (III)

Why is the rate of water exchange at Al(III) centres so slow ? According to this medical book (p.5) it is $10^{5}$ times faster at Mg(II).
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0answers
18 views

Ksp and polarity of KH2PO4, and comparision of solubility with other compounds [on hold]

What is the $K_{sp}$ of $\ce{KH2PO4}$? And is it polar or non polar? Also, lets say we have solutions of 0.03M $\ce{KH2PO4}$, 0.02 M $\ce{NaCl}$, 0.01 M $\ce{NaCl}$ and 0.02 M $\ce{MgCl2}$. Which ...
-4
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0answers
69 views

coordination chemistry and werners theory of complex compounds [closed]

A solution containing 2.674 g of $\ce{CoCl3*6NH3}$ was passed through the cation exchanger. The eluted solution yields 4.305 g precipitate of $\ce{AgCl}$ with an $\ce{AgNO3}$solution. ...
7
votes
1answer
44 views

What is the bonding type in hydrides of group 2 elements?

In one of my MCQ questions, there was a statement saying all group 2 elements form covalent hydroxides. I know it is incorrect. I know that $\ce{BeH2}$ is a covalent hydride. What about the rest? Are ...
4
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0answers
24 views

Can compounds found in concrete leach into soil against gravity?

I spent a while trying to figure out which stackexchange site in which to post this question, forgive me if I got it wrong. A number of scholarly articles indicate that concrete can leach calcium ...
6
votes
1answer
41 views

Does water vapor in the air oxidize copper?

My friend is installing copper pipes in his house, which is going to be in a humid area, and he says that copper will only be oxidized by the air and the excess water vapor in the humid air won't ...
1
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1answer
48 views

De-ionized water [duplicate]

Is de-ionized water more corrosive to metals than tap water? I have read that it "wants" the removed ions back and will aggressively take them from any available source.
-1
votes
0answers
44 views

Between AlH₄- and AlH₃Br- which is more stable ion and why?

Between $\ce{AlH_4^-}$ and $\ce{AlH_3Br-}$ which is more stable ion and why ?My teacher said that the second one is more stable due to presence of d-orbital. I couldn't follow what he meant.Can ...
0
votes
2answers
30 views

Identifying MgCl2 or CaCl2 in solution

I have an aqueous solution of either $\ce{MgCl2}$ or $\ce{CaCl2}$ in solution with $\ce{K2SO4}$. There is a white precipitate that forms on the bottom that does not dissolve when $\ce{HCl}$ is added ...
3
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1answer
64 views

Which allotrope of phosphorus is kinetically the most stable?

Which allotrope of phosphorus is kinetically the most stable? I ruled out white and yellow as being quite reactive. Red and black allotropes are both polymeric and comparitively less reactive. ...
4
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1answer
44 views

Disproportionation with aqueous NaOH

Which of the following undergoes disproportionation with $\ce{NaOH}$? $\ce{SiO2}$ $\ce{CO2}$ $\ce{SO2}$ $\ce{SO3}$ $\ce{NO2}$ From the above we can conclude that $\ce{SiO2}$, $\ce{CO2}$ and ...
1
vote
1answer
34 views

Approximating the concentration of ions when a salt dissociates

In my textbook written that: Given that $K_\mathrm{sp}(\ce{Ag2CrO4})=9.0\times 10^{-12}$, consider the solubility of $\ce{Ag2CrO4}$ in a $0.100\:\mathrm{M}$ solution of $\ce{AgNO3}$. Initial ...
5
votes
1answer
123 views

Vaporized sodium hydroxide?

Some time ago, I was making a $\ce{NaOH}$ solution. The solution I had made was much too concentrated, and the heat released in the dissolution of the ions caused the water to begin steaming. ...
7
votes
1answer
72 views

What would happen if someone consumed a Silica Gel Packet? [closed]

Most packaged goods have the tiny Silica Gel Packets packed along with a clear warning on every single packet. My question is, What exactly would happen if someone actually consumed the contents?
4
votes
1answer
28 views

What chemicals would make lime sulfur dip to produce a green colored smoke?

I work at an animal shelter that uses lime sulfur dip to treat ringworm. We had an accident where someone mixed bleach instead of water with the lime sulfur dip which caused us to go through ...
0
votes
0answers
19 views

Crystal field theory for calculating lattice parameters

If I have an 8-coordinated metal cation (e.g., $\ce{Te}$, $\ce{Nb}$, $\ce{Ta}$, $\ce{Sb}$, $\ce{Bi}$, $\ce{Zr}$, $\ce{Hf}$) by oxygen anions, is there a way to theoretically calculate the structure of ...
3
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0answers
28 views

Combustion of halo-organic compound

My question is based on the Preparatory Problem Set for the 47th IChO Problem 26 - Holy War against Four Horsemen of the Apocalypse (it is on page 36). It is written that cooling of Y combustion ...
2
votes
1answer
37 views

Is solubility in Qsp affected by coefficient?

Related to my previous question: Is solubility coefficient affected if ion data is given in Ksp? $200\,\mathrm{mL}$ solution of $0.02\,\mathrm{M}\,\ce{AgNO3}$ is added to $200\,\mathrm{mL}$ ...
8
votes
1answer
121 views

Nitrogen chain nomenclature

I know that nitrogen is versatile enough that it can form branched chains if it is all single bonds. For example: $\ce{H2N-N(NH2)-NH2}$ Is this compound a nitrane (nitrogen alkane)? If so how ...
5
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1answer
25 views

Why sodium sulphate has water absorbing capability?

At first I thought maybe sodium sulphate in contact with water produces sulphuric acid which absorbs water but I do not think it is actually a valid reason.
5
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1answer
27 views

How to dissolve composite In2O3 with SnO2 without affecting stainless steel?

I found this article, but it was not helpful. The $\ce{In2O3}$ is probably amorphous. $\ce{HNO3}$ and $\ce{HCl}$ do not work. Any ideas?
9
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2answers
95 views

What is formed when you leave iron (II) sulfate in plain air?

What is formed when you leave iron (II) sulfate in plain air? It was the question I found in textbook. Assuming that air is oxygen I solved it this way: $$\ce{FeSO4 + O2 -> Fe2O3 + SO2}$$ ...
2
votes
0answers
27 views

Can two metals bond covalently? [duplicate]

Can metal ions be engineered to behave like non-metals in terms of chemical properties (by supplying or removing electrons), would the altered metal ions bond covalently? Would the ions be too ...
2
votes
1answer
45 views

What is the color and structure of CrO3?

What is the structure and color of $\ce{CrO3}$? Also, is it possible to produce $\ce{CrO3}$ when dichromate is heated with sulphuric acid?
3
votes
0answers
23 views

Why does Pb(II) promote ligand substitution?

I have heard of an article where divalent lead $\ce{PbL2}$ ($\ce{L}$ is ligand) reacts with something (again not sure, as I dont know the article) and what it reacts with gains a ligand. In less ...
8
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0answers
98 views

How to calculate the pH of a saturated solution from its solubility constant Ksp and acidity constant Ka?

Given that $K_{\mathrm{sp}}(\ce{CaF2})=3.2\cdot 10^{-11}$, $K_{\mathrm{a}}(\ce{HF})=10^{-5}$, and $K_{\mathrm{w}}=10^{-14}$. Calculate $\mathrm{pH}$ of saturated $\ce{CaF2}$. Here is my ...
3
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1answer
36 views

Is solubility coefficient affected if ion data is given in Ksp?

Recently I've been looking at this website, which says: The $K_{\mathrm{sp}}$ of $\ce{Cr(OH)3}$ is $6.70 \times 10^{-31}$ Problem 1: What is the minimum $\mathrm{pH}$ at which $\ce{Cr(OH)3}$ ...
8
votes
1answer
104 views

Middle Row Anomaly in Periodic Table

I was studying about the periodic the periodic table recently and was reading a topic associated with Oxides of Halogens, and came across the following line The Bromine Oxides, $\ce{Br_2O}$, ...
4
votes
1answer
33 views

What causes triboluminescence and what process occurs to produce light?

I have observed this effect by rubbing together two pieces of quartz in a dark room but am unable to explain this effect. Would it be something to do with the way quartz is bonded as a covalent ...
10
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1answer
173 views

Dipole Moment Anomaly in Fluorine and Chlorine Compounds. What factors affect them?

I was checking dipole moment orders, and came across a very peculiar result: Methyl fluoride has lesser dipole moment than methyl chloride, but hydrofluoric acid has more dipole moment than ...
1
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1answer
68 views

Finding Cation of Unknown Salt in Solution from Precipitate

I should probably add that I was originally given an unknown solid mixture of 2 salts. I separated the insoluble salt out by centrifuging and then decanting. I found that the insoluble salt is ...
12
votes
2answers
370 views

What's so special about chelation? [duplicate]

There is another closely related post here , and I've also read the referenced wiki article including applications of chelation, but I still don't see what's so special about chelation. I understand ...
5
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1answer
65 views

By using the magnetic susceptibility, calculate the number of unpaired elections in the complex

I'm having trouble making sense of this answer. I believe I am doing all the steps right, but my main concern is that I am not arriving at a whole number. If my answer is correct, should I just round ...
5
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0answers
31 views

How many electrons in the d orbitals of NiCl2·6H2O?

On Wikipedia, it says that $\ce{NiCl2·6H2O}$ consists of separated trans-$\ce{[NiCl2(H2O)4]}$ molecules linked more weakly to adjacent water molecules. Only four of the six water molecules in ...
2
votes
1answer
49 views

Theoretical Calculation of Lattice Parameter from Space Group

If I am given a compound which belongs to, say the cubic $\text{Ia}\bar 3\text{d}$ space group, is there a known way to calculate the lattice parameter of the compound? In general, can lattice ...
2
votes
1answer
69 views

Which of the following statements is true regarding an ionic bond in FeS? [closed]

A) Iron atoms gain electrons and sulfur atoms lose electrons. B) Iron and sulfur ions bond by electrostatic attraction. C) The ionic radius of an iron ion is equal to its atomic radius. D) Breaking ...
5
votes
1answer
75 views

Why is no bromine liberated in the reaction of potassium bromide and concentrated phosphoric acid?

$\ce{KBr}$ reacts with concentrated $\ce{H3PO4}$ to give $\ce{HBr}$ and ($\ce{KH2PO4}$ or $\ce{K3PO4}$) (not sure which one, if someone knows it, please tell). Why isn't bromine gas liberated?
5
votes
1answer
204 views

Why does Thallium form TlF and TlF3 but aluminium only forms AlF3?

Does this have something to do with the inert pair effect?
4
votes
1answer
27 views

Is a transition metal with 7 d electons ever diamagnetic?

A transition metal with 7 d electrons forms a complex ion with cyanide. I know that cyanide is a high field ligand, which means the electrons will pair before moving to the next energy level, but ...
12
votes
1answer
505 views

Why does copper precipitate out as a pink solid?

When copper is precipitated out of a solution e.g from CuI, why does it appear pink instead of copper-coloured? Are there other situations where copper appears pink in solid form?
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0answers
22 views

Macroscopic features of a transition metal with a cubic closed packed structure [duplicate]

How would a transition metal with a cubic closed packed structure affect macroscopic features of that solid? I'm also not sure what it means by macroscopic features?
5
votes
1answer
31 views

Name for analog of salt hydrate with non-water solvents?

Salts can bind with some water to form hydrates. For example, we can call $\ce{CoCl_2\cdot 6H_2O}$ cobalt chloride hexahydrate. There is no reason that water should be the only solvent that can bind ...
4
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0answers
27 views

Gold recovery under vacuum

Can gold recovery with acid peroxide (ap) method be done under vacuum or left in sealed chamber, as opposed to placement in open air?
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1answer
80 views

How to figure out which two solutions will emit largest heat when they are mixed in same volumes?

How can I figure out which two solutions will emit the largest heat, when they are mixed in same volumes? Then let's assume that there is are five pairs of solutions given: \begin{align} \ce{2NaOH + ...
5
votes
1answer
42 views

How to make lead nitrate from pure lead

Is it possible to add copper nitrate solution and lead so that a single displacement reaction occurs to yield lead nitrate. I recently melted lead and added cooper nitrate to the molten lead. I then ...