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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68 views

Determine what the unknown element is

A piece of electronic equipment originally contained 1.250 g of a valuable metal. Corrosion over time has given a compound of formula $\ce{M(OH)3}$, which is isolated but not weighed. This compound is ...
2
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1answer
19 views

How effective is sulfur in detecting mercury vapors

I've read that powdered elemental sulfur will react to the presence of mercury vapor in the air creating red mercury sulfide, and that an open container of sulfur can be used as a means to verify ...
2
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1answer
39 views

Precautions and tips for Qualitative Inorganic Analysis of Coins

I'm a highschool student and as part of an investigatory project, I have decided to analyse which metals are present in our everyday coins. I chose this because in my previous academic year, I had ...
-4
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0answers
31 views

Airbags have become a standard safety feature in modern automobiles. [on hold]

Airbags have become a standard safety feature in modern automobiles. Several airbags are placed in the critical locations within automobiles and they inflate almost instantly upon impact to protect ...
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0answers
27 views

Can someone explain why NaOH is not the best reagent for Pb2+? [on hold]

I have no idea how to go about answering this question
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1answer
22 views

Are the rules proposed by slater for the calculation of Z effective right?

Today, I studied Slater's rules for calculating the effective nuclear charge. But, one particular line " The shielding power of the d and f orbital is lesser in comparison to the p and s orbitals" ...
-1
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0answers
15 views

How to identify a redox reaction and how to assign oxidation numbers [closed]

Indicate whether the balanced equations involve redox equations. Identify the elements that undergo changes in oxidation number. $\ce{I2O5(s) + 5CO(g) -> I2(s) + 5CO2(g)}$ ...
2
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1answer
21 views

A metal Q forms a carbonate and a nitrate. What is the molecular formula of the nitrate of Q?

Good day. This is my first post in any chemistry site. A metal $\ce{Q}$ forms a carbonate and a nitrate. The molecular formula of the carbonate of $\ce{Q}$ is $\ce{QCO3}$. What is the molecular ...
3
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0answers
41 views

Irreducible Representations to Classify Atomic Orbitals [duplicate]

I have some major confusion on Irreducible Representations. An example of a problem i have is Based on the character table for the point group of each of the follwing molecules, which irreducible ...
5
votes
1answer
51 views

Cyanide ion non-bonding/lone pair?

Where's the lone pair on the cyanide anion in this MO diagram? In the traditional Lewis picture there are two lone pairs on the cyanide ion. In the MO diagram though there appear to be no ...
1
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1answer
27 views

Enclathrated - definition?

When discussing the solvent uptake of a metal-organic framework would the correct term be "solvent molecules were enclathrated into the pores"? Despite searching for a definition online I have drawn a ...
0
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0answers
47 views

Is it dangerous to live near lead? [duplicate]

Several month ago, I soundproofed the door of my room with two sheets of lead. Can it be dangerous to live with them for many years? Can lead "decay" in some way and be inhaled? (and what happen when ...
5
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2answers
58 views

How to determine peroxy oxygen?

Which of the following compound doesn't contain peroxy oxygen? $\ce{CrO5}$ $\ce{Cr2O3}$ $\ce{Na2O2}$ $\ce{BaO2}$ I think peroxy oxygen peroxide(am I right?). I have read in this answer that there ...
0
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0answers
24 views

Copper and Hydrochloric Acid: Reaction or No Reaction? [duplicate]

In my chemistry lab, we had $18$ different reactions involving many different substances. One of the experiments involved placing a piece of copper metal in a hydrochloric acid. While observing it ...
1
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2answers
41 views

Can I make Cobalt Violet with these materials?

I'm given $\ce{CoCl2*6H2O}$ as well as $\ce{Na3PO4*12 H2O}$ The chemical formula for Cobalt Violet is $\ce{Co3(PO4)2}$. I haven't done stoichiometry in a long time but I think that's creatable, ...
3
votes
1answer
59 views

How to recover 15g gold from 50 gallons of 30% Acid?

Someone mistakenly poured a solution containing $15\mathrm{g}$ of gold into a nearly full waste drum that is around $30$% $\ce{HCl}$ with a little nitric acid in there as well. Is there a safe way ...
-1
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1answer
52 views

Is there a compound that binds with salt (NaCl) in solution? [closed]

Is there a non-toxic compound that binds with $\ce{NaCl}$ in a water medium?
2
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3answers
215 views

Is heating Copper Sulphate hydrate a chemical or physical change?

Sorry for the trivial question. I get varying answers across the net.
1
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2answers
41 views

How to recognize Barium sulphite?

Yes it's a white ppt which is soluble in dil. $\ce{HCl}$, but I'm not sure which of the following happens: $$\ce{BaSO3 +$dil.$HCl->Ba(HSO)3 +Cl-}\tag1$$ $$\ce{BaSO3 +2H+->Ba^2+ +SO2 ^ ...
5
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1answer
61 views

dissociation rates: trans-effect rule in square planar complexes

In lecture we became an easy description of the trans-effect. A ligand $ \ L^t \ $ with a higher trans-effect as $ \ L \ $ ( cis to $ \ L^t \ $) leads to a faster dissociation of ligand $ \ L^d \ $ ...
2
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3answers
42 views

Colour of Nickel thiocyanate

What is the colour of $\ce{C2N2NiS2}$ (Nickel thiocyanate)? In most of the web sites it only molecular weight,formula and other specifications but its colour is missing every where.
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0answers
23 views

Central Atom in EXAFS

I read somewhere that EXAFS (Extended X-ray absorption fine structure) gives us the distances between central atom and its neighboring atoms. Is that true? Why can't we get the distance between two ...
4
votes
1answer
61 views

Why is KF the most ionic compound?

I saw somewhere (can't recall where) that KF is the most ionic compound. I expected CsF. Does the greater polarizability of Cs allow it to more easily form covalent bonds compared to K? Does this ...
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1answer
94 views

Are there ligands without lone pairs? [closed]

The Nitronium ion, which is a positively charged ligand, in which the donor atom is Nitrogen. The question is, that Nitrogen has a total of 5 electrons, it shares 2 with oxygen and donates 2 electrons ...
3
votes
2answers
69 views

How to get back my beautiful crystals made from iron and sulphuric acid

I have put some old nails and screws in the 30% sulfuric acid to prepare an electrolyte for plating. After some bubbling and horribly irritating smell (probably $\ce{SO2}$), the reaction slowed down. ...
1
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1answer
50 views

Determining perovskite crystal structure

I've been reading that perovskite presents a sort of pseudocubic crystalline system, however it can be stretched and suffer modifications to become orthorhombic etc. The thing is, if I consider it ...
7
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1answer
158 views

Which is more basic, hydrazine or ammonia?

Which of the following will be more basic, hydrazine $\ce{H2N-NH2}$ or ammonia $\ce{NH3}$? My chemistry teacher said that $\ce{NH3}$ is more basic since after giving $\ce{H+}$ to hydrazine results in ...
3
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1answer
28 views

How does steric hindrance cause sulphur hexafluoride to have almost no reaction chemistry?

Sulphur hexafluoride ($\ce{SF6}$) is, according to the Wikipedia page, a hypervalent substance. However, according to the page in regards to $\ce{SF6}$ reactions: There is virtually no reaction ...
6
votes
4answers
626 views

Why does K+ have 0 valence electrons?

If we take a K atom and take away an electron why does it now have 0 valence electrons as it states in my General Chemistry textbook? I would think that if we do this, it would have the same exact ...
1
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1answer
55 views

reaction with Barium Chromate, Potassium nitrate

I'm confused, in the reaction:$$\ce{K_2CrO_{4(aq)} + Ba(NO_3)_{2(aq)}\rightleftharpoons BaCrO_{4(s)} + 2KNO_{3(aq)}}$$ I got a white precipitate in an opaque yellow solution and I was told that the ...
0
votes
1answer
26 views

Seeking word equations

is there a general word equation so I can learn how to write out the following: With chlorine, it seems to be: Hydrocarbon + Chlorine ---> ____ + HCL With Hexane, it seems to be: Hydrocarbon + Br ...
2
votes
3answers
91 views

Oxidation State of Oxygen in Na2O2?

I am asked to determine what is the O.S. of Oxygen in $\ce{Na2O2}$ I was under the impression that oxygen had a charge of -2 and I multiplied that charge by 2 giving me an Oxidation # of -4. ...
2
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0answers
25 views

Is there a compound where one element has a CCP structure with all voids occupied by others?

My Google-fu hasn't got me anywhere. All results have been quite fuzzy about it, nothing explicit.
6
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4answers
421 views

Mathematics in inorganic and quantum chemistry

Is mathematics important to learn concepts in inorganic chemistry, such as point groups, point symmetry, because doing these topics requires one to determine the symmetry of the elements and to ...
1
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3answers
71 views

HCl and KMnO4 reaction

I don't get how does this reaction proceed: HCl + KMnO4 = KCl + MnCl2 + Cl2 + H2O What I know: 1) HCl dissociates into H+ and Cl-. 2) KMnO4 dissociates into K+ and MnO42- What I don't get: How ...
4
votes
1answer
73 views

Determining the Packing Geometry of Compounds

I'm a little confused on the method to determine packing geometry. The question I'm given is Determine the packing geometry of the following compounds by using the radius ratio rules. For your ...
53
votes
3answers
9k views

Why is gold golden?

Bulk gold has a very characteristic warm yellow shine to it, whereas almost all other metals have a grey or silvery color. Where does this come from? I have heard that this property arises from ...
1
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1answer
34 views

Letting Copper sit in NaOH for 5 min (for monolayer assembly)

i made a self-assembled monolayer of dodecanethiol on copper, before that i let the copper in a solution of $\ce{NaOH}$ for 5 min, and i need to know what this step is for, anyone can help me?
4
votes
3answers
69 views

Where to find common inorganic/organometallic molecules?

I'm working on a project to create a large open repository of quantum calculations, largely for teaching purposes. I can get thousands of common organic compounds easily from sources like PubChem or ...
0
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2answers
42 views

Which water-soluble, alkaline oxide is formed? (Multiple choice question)

An element burns in oxygen to form a solid oxide which dissolves in water. The pH of the resulting solution is greater than seven. Which one of the following could the element be? A. sulphur B. ...
1
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1answer
110 views

Copper Doesn't React with Hydrochloric acid

5) Which one of the following metals does not react with hydrochloric acid? A. zinc B. magnesium C. iron D. copper E. aluminium The right answer must be copper but my question is why does Copper ...
1
vote
1answer
65 views

Outermost electronic configuration of f block elements

I have a doubt regarding the general outermost electronic configuration of f block elements. Why is it $(n-2)f^{1-14}(n-1)d^{0-1}ns^2$. The only exception i thought to this formula was thorium ...
0
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0answers
37 views

Here are four observations of the reactions of four metals

Here are four observations of the reactions of four metals. Metal F and G react slowly with water Metal H displaces metal G from its chloride salt solution Metal E does not react with dilute acids ...
5
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2answers
143 views

Dibromomethane bond angles

With regard to the above professor's claim, I disagree. Bent's rule, which states that atomic p-character is concentrated in orbitals directed toward more electronegative substituents, implies that ...
2
votes
1answer
145 views

How many Au atoms can be extracted from .250L of seawater?

Gold is present in seawater to the extent of 0.15mg/ton. Assume the density of seawater is 1.03g/ml and determine how many gold atoms could be extracted from 0.250L of seawater. (1 ton=2000lbs, ...
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0answers
29 views

Density of unknown solution?

A glass vessel weighs 20.2367g when empty and 20.3102g when filled to the etched mark with water at 4 degrees C. The same vessel was then dried and filled to the same mark with a solution at 4 degrees ...
1
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0answers
29 views

45.9 gram sample of borane (a compound containing only boron and hydrogen) and is 85.63% boron. What's the mass of hydrogen in this sample?

45.9 gram sample of borane (a compound containing only boron and hydrogen) that's 85.63% boron. What's the mass of hydrogen in this sample? I was just going to take 45.9 grams and multiply by .1437 ...
1
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2answers
70 views

What happens when KCl, K2Cr2O7, and concentrated H2SO4 reacts?

What happens when $\mathrm{KCl}$, $\mathrm{K}_2\mathrm{Cr}_2\mathrm{O}_7$, and concentrated $\mathrm{H}_2\mathrm{SO}_4$ reacts? I have no idea how to approach these questions. I'd love if anybody can ...
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votes
1answer
49 views

Battery acid density of 1.285 grams per cubic centimeter

Battery acid has a density of 1.285 grams per cubic centimeter and contains 38% by weight H2SO4, how many grams of pure H2SO4 are contained in a liter of battery acid? I just took 1.285 times .38 and ...
14
votes
1answer
746 views

Why do we write NH3?

We've learnt that the electropositive element is written first. Then why is ammonia written as $\ce{NH3}$ ?