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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What is Nano Zinc Oxide?

First of all, I have zero chemical background, but I seek for an easy explanation about Nano Zinc Oxide . I was told that the name of "Nano Zinc Oxide" should not be exist. Instead, it should be ...
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2answers
108 views

Is tetraammine dichloro cobalt (III) an optically active compound?

Is $$ \text{Co}[{(\text{N}{\text{H}}_{3})}_{4}{\text{Cl}}_{2}]$$ optically active? If so, write its stereo-isomers. I know that for a compound to be optically active, it should ...
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1answer
172 views

Is it possible to make metal fulminates?

Is it possible to make fulminates such as: magnesium fulminate, copper fulminate, etc. by the metal + $\ce{HNO3}$ + $\ce{EtOH}$ reaction?
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18 views

Why is an electron removed from the 4s instead of the 3d orbital, when ionizing an element from d block? [closed]

Why does electron get removed from $4s$ instead of $3d$ when ionizing an element from $d$ block? Answer is required in terms of effective nuclear charge
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So of the different characteristics of a XRD plot, wich is most appropiate to identify and suggested one phase among others?

This is the XRD Powder plot of a sample prepared with {La, Ti, K and O}. Thanks a lot for your suggestions. So of the different characteristics of a XRD plot, which is most appropriate and suggested ...
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1answer
48 views

Why would there be differences in UV/Vis spectrum?

$\ce{[NEt4]2[NiBr]}$ dissolved in $\ce{MeCN}$ and $\ce{[NEt4]2[NiBr]}$ dissolved in $\ce{H2O}$ have different UV/visible spectra in the visible region. How would they differ, for example would one of ...
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0answers
48 views

What is this compound that was made? [closed]

1.25g $\ce{Ni(en)2Cl2}$ in 10ml water + 2 drops of pyridine + 1g 2,4-pentanedione in 10ml $\ce{MeOH}$ refluxed for 2 hours, large crystals formed It is a $\ce{Ni(II)}$ square planar compound Mass ...
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2answers
38 views

Thermogravimetric Analysis of hydrated compounds

I have been given this thermogravimetric analysis of my compound $\ce{NiBr2.$x$\,H2O}$ and I need to work out the number of moles of water in the complex. Also why are there two steps in the data?
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1answer
79 views

What does it mean in a Ni(II)complex if the HNMR spectrum appears unbroadened and unshifted & what does this tell you about the coordination geometry?

I am trying to work out the an unknown Ni(II) complex. I don't known the geometry and I have read that broad lines on the nmr spectrum indicate large compounds with symmetric environments. Does this ...
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1answer
44 views

Questions on reactions during salt analysis [closed]

I have two questions: What is the reaction between Diphenylamine with Nitrite compound during Nitrite test during anion analysis DIPHENYLAMINE - $\ce{(C_6H_5)_2NH}$ NITRITE - $\ce{NO_2^-}$ What is ...
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1answer
35 views

The standard for drinking water is 1300 mg/l and the first area has a value of 837 ug

I am trying to figure out the hazard quotient of copper compared to the standard. The standard for drinking water is $1300 \frac{mg}{l}$ and the first area has a value of $837 \mu g$. How do I convert ...
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5answers
578 views

Is it still possible for an amateur, a hobbyist, or a science buff to make relevant discoveries in chemistry today? [closed]

Consider astronomy. Hobbyists and amateurs are today still able to make small to moderate scientific contributions to their field. Is the same true in chemistry? I think there might be at least two ...
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1answer
363 views

Would there be a difference if deuterium is embedded instead of protium (regular hydrogen) in acids?

So instead of regular hydrogen, it would be a deuterium (still a Hydrogen). For example, instead of $\ce{HCl}$ it would be $\ce{DCl}$ where D is a deuterium.
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40 views

Although thermodynamically feasible, in practice, magnesium metal is not used for the reduction of alumina in the metallurgy of auminium. Why?

Everyone knows: $$\ce{Mg +Al2O3->MgO +Al}$$ Thermodynamically feasible is this reaction. Use can we this for reduction of Alumina. And produce Aluminium. Then why dont we dont use this why?
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34 views

Is it true that under certain conditions, Mg can reduce SiO2?

Is it true that under certain conditions, Mg can reduce $\ce{SiO2}$ and the latter the former? What are those conditions?
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32 views

Actinoids vs Lanthanids?

1)The chemistry of actinoid elements is not smooth as that of the lanthanoids. Why? Both have f electrons,both are alsmost near so properties must be nearly smae then why? 2)Actinoid contraction is ...
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2answers
48 views

Reaction between lead dioxide and nitric acetate

A wikipedia article suggests that lead dioxide is produced by this reaction: $\ce{Pb3O4 + 4 HNO3 → PbO2 + 2 Pb(NO3)2 + 2 H2O}$ The same article also suggests that lead dioxide reacts with nitric acid ...
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1answer
44 views

Prepare 1 liter of 28% NH3(aq) solution from 1 gal of %10 NH3(aq)

I have one gallon of commercial, surfactant free, ammonium hydroxide solution that I would like to use to prepare a concentrated solution. I have two options as I see it, and I am still getting into ...
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0answers
28 views

Why are d-orbitals required/used for hypervalent molecules (where the central atom has expanded its octet) [duplicate]

Period 2 elements like carbon, oxygen and nitrogen cannot expand their octet because they cannot make use of d orbitals in that energy level (they don't exist). However, period 3 elements like sulfur ...
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2answers
56 views

What causes the colour when conducting flame tests on solid salts?

The normal technique for flame tests is to dip a clean nichrome or platinum wire into a solution of the relevant salt, and observe the resulting flame colour when inserting the wire into a ...
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2answers
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Why does reduced mass help when talking about two body problems?

Firstly I would like to say that despite the fact that you may be thinking that this is a physics question and should probably be asked on that part of the website, I came across reduced mass for the ...
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1answer
47 views

How do I know with which oxidation numbers I can form a certain kind of compound?

Take, for istance, phosphorus; it has eight different oxidation numbers, but it can only form two different anhydrides, phosphoric (when the oxidation number is 5) and phosphorous (when it is 3). How ...
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electron affinity and electron gain enthalpy

Can anyone help me to clarify the difference between electron affinity and electron gain enthalpy? For example- Why is second electron affinity of oxygen greater than that of sulphur? I think it ...
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38 views

Why pyridine is a monodentate ligand while pyrrole is a tridentat ligand?

is it correct to say pyridine's non-bond electron does not participate in electron resonance and pyrrole's non-bond electron participate in electron resonance and pyrridine would not disturb the ...
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1answer
24 views

Which one of the compounds listed would we use in order to get the highest concentration of sulphate ion in a saturated solution?

Solutions are prepared by dissolving a sulphate salt in water. Which one of the compounds listed would we use in order to get the highest concentration of sulphate ion, SO42-, in a saturated ...
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2answers
75 views

Why does Cobalt have different coordination numbers in its complexes with water and thiocyanate?

I'd like to know why does cobalt(II), $\ce{Co^2+}$, form $\ce{[Co(H2O)6]^2+}$ complex with water while it forms $\ce{[Co(SCN)4]^2-}$ with the thiocyanate? Why is there $\ce{6H2O}$ but only $\ce{4 ...
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1answer
99 views

Stability of Sulfides - backbonding?

A stability model premised on Lewis acid-base covalent bonding can be proposed to rationalize the stability shown by sulfides such as CuS and Ag2S. For instance, although the oxide anion is a ...
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1answer
30 views

How can concrete set underwater?

I'm about to teach concrete to some high school children. I'm not a chemist but as I understand it the limestone cycle is this: ...
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1answer
30 views

How does absence of nd orbital in Oxygen affect its valency?

The original question was 'Oxygen exhibits Oxidation state -2 to +2 but other elements of grp 16 exhibit only +2,+4,+6. Explain Why'. In the solution given i can't understand meaning of this line 'It ...
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1answer
31 views

Is shielding of electrons really best described as shielding or is it really Coulombic repulsion between electrons?

For example, take the 2s electron in lithium - is the reason that it's ionisation energy is lower than would be expected if "shielding" didn't occur at all because the 1s electrons shield the ...
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3answers
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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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Wade's rules for Zintl ions

How do you apply Wade's rules to Zintl polyhedral cluster anions ? For example, I believe $[\ce{Bi_3}]^{3-}$ is a triangle. My approach to justify would be: 5 electrons per each Bi atom 3 electrons ...
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3answers
99 views

Are these reaction equations for the formation of the brown ring complex correct?

The above are the reactions given in my book for the qualitative analysis of nitrate ion (formation of the brown ring complex). I think that the reactions above are incorrect. The first one shows ...
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4answers
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Is Carbon Dioxide Organic or Inorganic?

Today in Chemistry class we were discussing Organic Chemistry. We discussed what organic compounds basically are and then I asked teacher whether $\ce{CO_2}$ is organic or not. She told that it is as ...
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1answer
37 views

How to decide acidic or basic nature of oxides

How can we theoretically decide the acidic or basic nature of an oxide? What are the reasons/ factors which make an oxide acidic, basic, amphoteric or netural?
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28 views

Why inert pair effect is seen in P- block elements only

why is inert pair effect specific to certain groups? Why heavier transition elements DO NOT show inert pair effect?
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106 views

Alternative PCB etching solutions - Is KMnO4 or NaCLO suitable oxidizer?

I need to etch small PCB for my project, since I do this once in a blue moon I would like to try some easy approach, preferably with household items. I'm aiming at the use of acetic acid with hydrogen ...
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1answer
37 views

Clean silver with aluminum foil and *

I already have two questions touching on this subject and there is a third question as well. The thing is that all the other question talk about cleaning silver with aluminum foil and carbonated ...
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27 views

How is N to C ratio measured in forming austenitic stainless steel?

Nitrogen is the future hope of stainless steel industry; since in the production of austenitic steel it can even completely replace Nickel (which is relatively very expensive) in some cases and for ...
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Dimers of different compounds

Why does $\ce{BeH2}$ dimerise into $\ce{(BeH2)_{n}}$ in solid state whereas $\ce{AlCl3}$ dimerises into $\ce{Al2Cl6}$ in the vapour state ?
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487 views

Using MO theory, give an explanation for the C-C bond length in cyanogen

1. The problem statement, all variables and given/known data 2. The attempt at a solution I know that the MO diagram for CN- is this: I am unsure how to draw the MO diagram for cyanogen. I know ...
2
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0answers
31 views

What is the chemistry behind cleaning silverware with aluminium foil

This question has a accepted answer on this sit already What happens during cleaning silverware? but the reason I ask the question again is because I found different "recipes" for the technique and ...
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24 views

Clean tin with aluminium

I've been using aluminium foil and table salt to clean my silverware for a long time without actually concerning myself with the chemistry behind it. A couple of days ago i started digging into the ...
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2answers
529 views

Why is sand, sand; and why is glass, glass; While both mainly contain Silicon Dioxide?

I know that there is the famous process of heating material and converting them to glass; but what I don't know is, what is the chemical process of the creation of glass? Is it crystallization? How ...
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3answers
302 views

Is there a simple and inexpensive way to generate nitrogen gas?

It's fairly easy to generate a significant yield of hydrogen gas simply by reacting zinc metal with $\ce{HCl}$ or aluminum with $\ce{NaOH}$ solution. But is there a simple and inexpensive chemical ...
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0answers
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What distinguishes a Lewis Complex from an Adduct or are they synonymous?

I cannot think of a distinction - the terms seem to be used interchangeably when talking about products of Lewis acid-base reactions. However, I am concerned that I may have overlooked a subtlety. ...
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Chemical Thermodynamics

In this pic, you can see the report for lab work. I did the labwork, and it is asking -to find delta H pr -? -delta H (theor)-? -error ? Please help me to find those
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1answer
28 views

Why is Cu2HgI4 filtered while it is hot?

Why is it required that the solution of copper (I) tetraiodomercurate (II), which has a thermochromic property, be filtered while it is hot?
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2answers
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Why does N2 react with O2 to Form NO at high temperatures?

This also raises questions that I have about the Haber Process which produces ammonia ($\ce{NH3}$) from molecular nitrogen ($\ce{N2}$) and hydrogen ($\ce{H2}$). I have heard multiple times that bond ...
2
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1answer
28 views

Identifying Compound from the given information

A white solid is either $\ce{Na2O}$ or $\ce{Na2O2}$. A piece of red litmus paper turns white when it is dipped into a freshly made aqueous solution of white solid. Identify the ...