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.

learn more… | top users | synonyms (1)

2
votes
1answer
56 views

Using non-food grade NaOH for pH control

I would like to use non-food grade $\ce{NaOH}$ for $\ce{pH}$ water treatment. Any problem with this mixing with water that contains iron? The $\ce{NaOH}$ will be pumped into a well. As a $25\%$ ...
3
votes
1answer
267 views

Making Zn in school lab

I want to make $\ce{N2O}$ in my school chem lab. I'm thinking of making it from $\ce{Zn_{(s)}}$ in $\ce{HNO3_{(dil)}}$ : $$\ce{ Zn_{(s)} + HNO3_{(dil)} -> N2O + Zn(NO3)2 + H2O }$$ I'm not able ...
1
vote
1answer
24 views

What does a radical mean here?

I'm really confused as none of the definitions of radical on the internet compare to this. This is from my college textbook of Applied Chemistry- Radicals Every inorganic compound is made up ...
0
votes
0answers
17 views

stability of oxy acids of boron [closed]

Q 1..why is boric acid stable in solution? where as tetra and meta boric acids are unstable.Q.2..how do you compare the thermal stability of ortho boric acid,tetra boric acid ,meta boric acid and ...
0
votes
1answer
18 views

Can anyone explain the reaction mechanisms of these synthesis?

Can anyone explain the reaction mechanism of the following synthesis ? 2NH4Cl + Ca(OH)2 --> 2NH3 + 2H2O + CaCl2 (NH4)2SO4 + 2NaOH --> 2NH3 + 2H2O + NaSO4
1
vote
1answer
33 views

Structure of diamond

"diamond structure. Every carbon atom is bonded to four other carbon atoms forming a three-dimensional lattice of chair conformations." SENTENCE FROM A BOOK What does this mean? Where I am struck ...
-1
votes
0answers
20 views

Determining mass through titration [closed]

Combustion of $\ce{C5H5N}$. The oxide(s) is/are dissolved in $500~\mathrm{mL}$ (No change in Volume). $10~\mathrm{mL}$ of this solution is added to Barium hydroxide ($0.1~\mathrm{M}$), this ...
2
votes
0answers
24 views

Why does ozone have an electrostatic potential map similar to that of SO2?

This is the electrostatic potential for ozone. This is the electrostatic potential for sulfur dioxide. They look almost exactly the same except 1 is all oxygen atoms and the other has sulfur in ...
7
votes
2answers
83 views

Does O2 have a color in the gas phase

I have noticed that liquid O2(I clarify it as O2 because oxygen exists in several other forms which have different colors in the liquid state than O2) has a light blue color to it. In the solid ...
5
votes
2answers
531 views

What are Nitrogen fumes?

What is the actual composition of Liquid Nitrogen fumes? Are the harmful anyways if directly came in contact with?
2
votes
1answer
21 views

How is ammonia used in production or processing of steel?

There are some large tanks of ammonia in nearby iron works. I wonder, what do they need it for? What is the application of ammonia in steel industry - what processes of making or processing steel ...
1
vote
2answers
52 views

Advanced Level Chemistry Book Recommendation

I have a test comming up on Chemistry in Advanced Level and I sincerly ask for a book recommendation for chemistry. I already got the book chemistry by Ramond Chang. And I am pretty near to the exam. ...
3
votes
1answer
47 views

Elementar cell of Y2O3

I think this picture from wikipedia is wrong because I count: \begin{align} \left. \begin{array}{ccccr} 1&×&1 &= &\ce{1~Y} \\ 6&×&\frac{1}{8} &= &\ce{\frac{3}{4}O} ...
0
votes
0answers
17 views

Extreme Thermodynamic Stabilities of Metal Aquo/Hydroxide Complexes

From this table of standard oxidation potentials we can see that the hydrated metal hydroxides are much more thermodynamically stable than their elemental counterparts. The numbers on the far right ...
3
votes
2answers
163 views

How many different possible structures (isomers) are there for the complex, [Mn(OH2)3(NH3)3] 3+?

How many different possible structures (isomers) are there for the complex, $\ce{[Mn(OH2)3(NH3)3]^{3+}}$? I really don't know how to begin with this. I know the answer is 2, but i don't have the ...
1
vote
1answer
49 views

What is the reason for the different solubility of silver halides in ammonia?

According to my knowledge, I know that $\ce{AgCl}$ dissolves in dilute ammonia, $\ce{AgBr}$ dissolves in concentrated ammonia and $\ce{AgI}$ does not dissolve even with concentrated ammonia. What is ...
5
votes
1answer
97 views

Byproducts of the neutralisation of hydrochloric acid with sodium hydroxide

Given a 1M concentration of $\ce{HCL}$ and $\ce{NaOH}$ here are the pHs: pH of $\ce{HCL}$: 1 pH of $\ce{NaOH}$: 13-14 and of course water has a pH of 7. Here is a reaction that is most likely to ...
1
vote
1answer
30 views

Why are oxides always of the form AyOx with A representing any atom except oxygen and fluorine

I notice that for quite a few elements, oxygen comes before it in alphabetical order. Here is one of the rules in inorganic chemistry for molecular formulas: Put all the elements in alphabetical ...
3
votes
0answers
33 views

Carbon Oxides and stability

If C2O4 is very unstable no matter the configuration(that is the structure based on the bonds) and especially unstable in the form that has an oxyanion and a carbocation than how come other carbon ...
3
votes
1answer
21 views

Chemistry of Walter Mitty's negative developer/stop bath/fixer?

I asked a question here How can Walter Mitty examine the negatives of photos in the bright sunny day? Commonly known, there are three steps using chemical baths to bring out the images of negatives: ...
3
votes
1answer
29 views

can sodium persulfate etch or damage a titanium heater?

I use Sodium Persulfate to etch copper on a PCB process. I have been using glass heater on the etching tank but the glass is too fragile; it breaks too easily. I read that titanium heater is used ...
5
votes
6answers
718 views

Why is O=C=O nonpolar?

I understand that polarity is electronegativity difference and that the more the electronegativity difference, the more polar the bond. However, I have read that O=C=O is nonpolar. This doesn't make ...
2
votes
1answer
54 views

Electrochemistry question about equilibrium in half cell reaction

Given the following half-reactions: $\ce{Ce^{4+} + e− -> Ce^{3+}}$ E° = 1.72 V $\ce{ Fe^{3+} + e− -> Fe^{2+}}$ E° = 0.771 V A solution is prepared by mixing ...
2
votes
1answer
36 views

What makes a ligand stronger than another?

A ligand is a neutral molecule or negative ion with at least one lone pair of electrons which forms a dative covalent bond with a complex ion that has a vacant, energetically accessible orbital. It ...
2
votes
1answer
33 views

Carbonyl/Nitrosonium Complex Stability

Why is the nickel complex exhibiting the strongest pi-bonding? From what I understand, charge density plays a role. Also we need some empty orbitals on the metal cation, since we're looking at ...
1
vote
1answer
34 views

Explanation for increase in the number of oxidation states for transition elements from Sc to Mn of the 4th period

From Sc, to Mn, the number of oxidation states increases from one (Sc) to seven (Mn). The explanation for this is because the unpaired 3d electrons can be lost along with the 4s electrons during ...
1
vote
1answer
26 views

Finding the chemical name of SnMg₂O₄

Can somebody help me in identifying the name of $\ce{SnMg_2O_4}$? Other examples are $\ce{ZnAl_2O_4}$ (Zinc Aluminate), $\ce{ZnIn_2S_4}$ (Zinc Thioindate). Please kindly provide the reference if ...
2
votes
1answer
52 views

The definition of formal Charge

Ok, most people including me know that formal charge is just a book-keeping tool. I know how to calculate it, apply it to Lewis structures etc etc. But I am confused in its very basic definition which ...
1
vote
1answer
36 views

How many ligands in Heme?

How many ligands does Fe has in heme ? I am not sure how many are in heme and how many in cytochrome C. Its about iron complexes.
1
vote
0answers
45 views

Are there practical chemical reactions that do mechanical work without heat or electricity?

Every day we use chemical reactions to perform mechanical work by creating either heat (e.g. in a piston engine) or electricity (batteries). I know muscles perform work by taking stored chemical ...
3
votes
1answer
25 views

Oxidation numbers of phosphorus pentachloride

I read detailed explanations of what oxidation numbers/ states represent and it boils down simply to this: If it's positive, it shows how many electrons the element lost, and in the case of a negative ...
3
votes
1answer
50 views

Which is more soluble in water and why: K₂HPO₄ or CaHPO₄?

If I dissolve $\ce{K_2HPO_4}$ and $\ce{CaHPO_4}$ in water (two different reactions), the latter shows better solubility. Is it because $\ce{Ca^{2+}}$ has ha higher valence of $2$ than $\ce{K^+}$, ...
2
votes
1answer
65 views

Why is oxygen absorbed in a colorless alkaline solution of pyrogallol and why does it turn dark brown?

I'm reading about recognition and identification of gases. My book says: Oxygen is absorbed in colorless alkaline solution of pyrogallol and turns dark brown? I'd like to know why and how. ...
0
votes
0answers
23 views

How is the oxidation number related to the group number?

How is an oxidation number of an element related to its group? I was trying to answer an homework question.The question was: If an element X forms the highest oxide of the formula XO3, then it ...
2
votes
1answer
66 views

Melting alumina ($\ce{Al2O3}$)

First of all, I am new to StackExchange, so let me use this occasion to greet you all. My inorganic chemistry is at a basic level, so my question is, if I heat alumina ($\ce{Al2O3}$), to its melting ...
0
votes
1answer
78 views

Magnesium Sulphate and Calcium Nitrate reaction requires heat

In an effort to create Calcium Sulfate I mixed Magnesium Sulfate and Calcium Nitrate but no precipitate was formed and so I started to boil down the mixture to concentrate the reactants where upon a ...
2
votes
3answers
56 views

What does 'organic/non-ogranic molecule' means exactly?

I am new to the organic chemistry world. I was delving for the exact answer to my question, and I've found some results: In wikipedia (french), is was mentioned that an organic molecule contains ...
3
votes
1answer
48 views

Rust forming and being washed off by the same substance

I have noticed that when exposed to water for a few days the water turned the steel in my wagon into rust. After several more weeks the rust that formed is dissolved and once I pour the water out ...
1
vote
2answers
107 views

Difference between backbonding and hyperconjugation and conjugation [closed]

What is the difference between backbonding and hyperconjugation and conjugation? I mean the basic differences as all are concerned with donation of electrons. What is the most striking effect of each ...
2
votes
1answer
73 views

what makes mercury vapours so harmful

I just read an experiment in which mercury has to be heated and in the same experiment there was a note saying do not inhale mercury vapours as they are very harmful I just can't get the point why ...
0
votes
0answers
52 views

I need help with this exercise i need to find all chem elements

White solid A water insoluble cleaved hot to solid gas B and C. B is insoluble in water and in $\ce{HCl}$ but soluble to $\ce{HNO3}$ the react gives solution D and E colorless gas which becomes red ...
0
votes
1answer
46 views

Does washing soda (sodium carbonate) turn into baking soda (sodium bicarbonate) over time?

I have some sodium carbonate. But it's over 20 years old and was not kept in tight bottle. I wonder if this compound absorbs $\ce{H2O}$ and $\ce{CO2}$ from air. I guess I'd need to burn it a little ...
0
votes
1answer
33 views

Calculating Electronegativity of Fluorine [closed]

Calculate the electronegativity of Fluorine from the following data. EH-H = 104.2 kcal/mol EF-F = 36.6 kcal/mol EH-F = 134.6 kcal/mol XH = 2.1 How to solve? Any wiki or link to somewhere where ...
0
votes
1answer
44 views

Which is more acidic? CO or CO2?

Q1)Which of the given compounds is most acidic? $\ce{CO}$ or $\ce{CO2}$ ? How to solve(explanation)? EDIT: Q2) $\ce{BeO}$ is amphoteric while $\ce{B2O3}$ is acidic - True/False?
2
votes
2answers
77 views

Ionization Energies of Sulphur and Oxygen Anions

Which of the following are in the correct order of their Ionization Energies?(Multi-Answer Question) a) $\ce{O > S > S- >O-}$ b) $\ce{F > F- > Cl- > Cl}$ c) $\ce{O > O- ...
2
votes
2answers
50 views

Sulphur oxoacid forming

I got this reaction and I can't figure out the end products $$\ce{SO2 + S + CaO + Na2SO4 -> Na2S2O3 + ~?}$$ Guessing some calcium sulphur salt should form, but which one?
1
vote
1answer
56 views

Why does Mercury have low melting and boiling points?

Many metals have high melting and boiling point but Mercury has low melting and boiling point. What are the possible reasons?
2
votes
1answer
80 views

Balancing redox equation

So I had these two reactions that confused me .. I tried the standard way of balancing it (Putting oxygen number everywhere, +1,+2,-2 etc.) and then go on with it but it didn't work So anyways here ...
0
votes
2answers
81 views

NCl₃ + H₂O → NH₃ + HOCl , the resulting solution is acidic, basic or neutral?

When $\ce{NCl3}$ is dissolved in water, $\ce{NH3}$ and $\ce{HOCl}$ is formed. Can you please explain me whether formed solution is acid or basic or neutral? thank you!
1
vote
1answer
82 views

Why does the solubility of Group II hydroxides increase and the solubility of sulphates decrease down the group?

I know that, solubility of alkaline earth metal hydroxides increases down the group and solubility of alkaline earth metal sulfates decreases down the group. Would you please explain me the reason ...