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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20 views

Why does Manganese have so many stable oxidation states? [on hold]

Manganese ions are stable at various oxidation numbers, going from -3 to +7. Why?
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5 views

Parameter effects on kinetics of esterification for bio-diesel production

I want to discuss the effect of parameters on the kinetics of esterification for bio-diesel production. In esterification process, temperature effect and molar ration are two important parameters. ...
0
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0answers
8 views

Experiment with magnesium-sulfur fertilizer

This fertilizer for is for soil and plant growth, and I was thinking of doing an experiment with it. The bag says it contains magnesium sulphate and water soluble sulphur trioxide. Is there anyway to ...
-1
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0answers
9 views

What is sp mixing? And what is term interaction? [on hold]

Is In MO diagram of CO sp mixing occure? why the sp mixing occure here?
0
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0answers
17 views

Does HXeO3F Exist? [on hold]

Xenon forms many compound in nature. Does $\ce{XeO3FH}$ exist in nature?
1
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1answer
24 views

What is the reaction between NaOH and urea?

In this video it is mentioned that urea and sodium hydroxide will react to produce ammonia. However, I can't seem to find a clear explanation of the reaction and the other products generated. One ...
1
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0answers
23 views

Which is more amphoteric: zinc or copper hydroxide?

$\ce{K_{a} ~Cu(H2O)_6^2+}{=~5*10^{-7}} $ $\ce{K_{a} ~Zn(H2O)_6^2+}{=~2.5*10^{-10}} $ Given this information, which forms a more amphoteric hydroxide? My reasoning is that copper hydroxide is more ...
1
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0answers
17 views

Inert Pair Effect Anomalies? [on hold]

Why wouldn't the s and p orbitals of the penultimate shell in large atoms like Bismuth be able to shield the d and f orbitals of the valence shell from the effect of the nucleus hence shielding the s ...
3
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1answer
46 views

Thermal decomposition of metal nitrates: iron nitrate (II) and sodium nitrate - why the different products?

$$\ce{4Fe(NO3)2 -> 2Fe2O3 + 8NO2 + O2}$$ $$\ce{2NaNO3 -> 2NaNO2 + O2 }$$ Why do they decompose in different ways? Why do we get a nitrite with sodium but an oxide with iron?
3
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1answer
54 views

How the equation that describes evolution of alkyl nitrates has been derived?

I was reading this paper, Bertman, S. B., J. M. Roberts, D. D. Parrish, M. P. Buhr, P. D. Goldan, W. C. Kuster, F. C. Fehsenfeld, S. A. Montzka, and H. Westberg (1995), Evolution of alkyl nitrates ...
2
votes
1answer
75 views

Do cyclic oxygen molecules exist and their theoretical stability?

Do oxygen molecules ever become cyclic shapes like carbon and other elements? Why doesn't oxygen form cyclic compounds? How stable would they be if they do exist. Especially more than 3 oxygens. ...
0
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0answers
13 views

A polymer or a substance that can stick to almost any surface..? [on hold]

I am looking for a polymer, most probably an elastomer that could stick to surfaces and can be elastic in nature. For a First year mechanical engineering project i am planning to make a rope or string ...
-4
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0answers
20 views

What is the reaction equation for the production of [Cu(gly)2(OH2)]? [on hold]

What is the reaction equation for the production of [Cu(gly)2(OH2)]? I did an experiment and we used the following procedure to make cis-$\ce{[Cu(gly)2(OH)2]}$; Prepare cis-$\ce{[Cu(gly)2(OH)2]}$ as ...
1
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0answers
25 views

Molten NaI electrolysis

electrodes: Zinc electrodes electrolyte: molten sodium iodide I know that at the cathode, sodium metal will be formed because only sodium ions are present for reduction. At the anode, originally ...
1
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0answers
77 views

Why do NaNO3 + Al + NaOH yield ammonia?

From Russian test problem 4301: $$\ce{3NaNO3 + 8Al + 5NaOH + 18H2O -> 8Na[Al(OH)4] + 3NH3(g)}$$ How does ammonia evolve here? Is it that we get hydrogen gas evolving in the reaction between Al ...
8
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3answers
79 views
+500

How to separate and analyse a sample of cations of alkaline and earth alkaline cations and ammonium?

I am teaching a section of qualitative analysis and I am trying to get a better grasp on the assignments the students are doing. These are the cations they may be presented with and must identify: ...
0
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0answers
10 views

Role of acetate ion in formation of hydrogen sulfide ion from thioacetamide

We are using TAA to form metal sulfides. What is the effect of sodium acetate on sulfide ion concentration? The procedures instruct me to add sodium acetate and to heat the test tube with the metal ...
-1
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0answers
30 views

Why do chemical reactions occur? [closed]

I know that a chemical reaction occurs when it stabilizes a substance. Entropy can decrease in chemical reactions. Despite this, however, the entropy of the universe must always increase as time ...
0
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1answer
57 views

How do we get NaClO3 in the reaction between Cl2 and NaOH?

From problem no. 4080 in a Russian example exam set: $$\ce{6NaOH + 3Cl2 -> NaClO3 + 5NaCl + 3H2O}$$ How do we get that $\ce{NaClO3}$? I can't seem to guess. I found this explanation on YouTube, ...
-1
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0answers
8 views

biodiesel production from oliec acid with methanol and use H2SO4 catalyst in esterification process [closed]

in esterification process before 70-80% conversion temperature effect or contribution more-thane molar ratio but after 70-80% conversion temperature effect or contribution less-thane molar ratio ?
0
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0answers
27 views

Why would a reaction take place in this instance?

This makes little sense to me, both of the electron configurations are d6, and would presumably be low spin - therefore both reactants should be inert, and yet my notes suggest that an electron ...
1
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2answers
79 views

How to work out equations with period 3 oxides?

I know the general equation of reacting an acid with a base to be the salt and water, but I am not able to apply this to the following equations. So in what way can I derive the end product if I have ...
0
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0answers
22 views

Size of Germanium compared to Silicon

Gallium has a smaller atomic radius than Aluminum because of the poor shielding effect in Gallium due to the presence of 3d orbital. However why does this not happen with Germanium and Silicon, ...
-1
votes
1answer
22 views

Can I calculate the percentage of alcohol if I only know that 100ml wheight 90,135 g [closed]

Imagine I have a bottle of 100ml which weight 90,135gr. I know that there is only water and alcohol in it. I know that the weight of water is 0,998 gr/cm3 and alcohol is 0,79 gr/cm3. And when I try to ...
1
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1answer
42 views

Hybridization of tetraamminecopper(II) sulfate

$\ce{Cu^2+} $ has 9 electrons and a d-orbital and is almost completely filled (except 1 electron vacant) and $\ce{NH3}$ donates an electron eventually forming $\mathrm{sp^3}$ hybrid orbitals. But it ...
0
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1answer
32 views

Cross-linking in Latex

My understanding was that cross-linking would generally make a material harder and less flexible, but if latex does have cross-linking, how would this affect its shape and hence its properties, ...
0
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1answer
30 views

Can sodium acetate anhydrous be used as a desiccant?

Sodium acetate trihydrate can be converted to sodium acetate anhydrous easily with an oven. I've been told to quickly store sodium acetate anhydrous in a sealed container because it takes water from ...
0
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0answers
40 views

Software for Chemistry + Electrochemistry Workflow

I am working on a project (can't talk about it), but essentially we have a list of compounds which includes catalysts for electrochemical reactions (those that release energy), metals like Ti, Mn, Zn, ...
0
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1answer
36 views

Fake smoke for a fire drill on a boat?

Is there any way to generate fake smoke that could be used in a fire drill on boat? Basically the idea is that the captain would set the "fire" and it would start smoking. The crew then has to find it ...
0
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0answers
17 views

Concave and convex points on a frost diagram

I do know that a concave point on a frost diagram is where a particular molecule's oxidation state is thermodynamically stable and will not disproportionate (usually the most stable oxidation state), ...
1
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2answers
46 views

Difference bewteen polarizability and dipole moment?

In my head, any molecule that is very polarisable, has a dipole moment. Is this true? I am very confused and can't seem to find anything that helps my thought, and I can't seem to distinguish between ...
0
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2answers
30 views

Making a salt using metal oxide

Is this possible? Get a metal like Sodium and then you burn it to make Sodium Oxide because burning something is adding O2. Then you add the Sodium Oxide to an acid like Hydrochloric Acid and then ...
0
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0answers
9 views

How is there 1G term symbol when the max L is 3F for a free ion which has 3d2 electrons

I am very confused as to why there is a G term symbol when the ground state of a free ion = 3F. This is for a 3d2 free ion and I am very confused....I would like to think it might be because when the ...
3
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1answer
355 views

Can hydrofluoric acid etch glass at a pH of 7.0?

Will it still etch glass when very dilute? Will the reaction still proceed slowly? At what pH will the reaction stop completely? "Although hydrofluoric acid is regarded as a weak acid, it is very ...
1
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0answers
12 views

Coordination number of C in Methyllithium tetramer

According to Concise Inorganic Chemistry - J.D.Lee, the Coordination number of carbon in $Li_{4}(CH_{3})_{4}$ is $7$. But the structure of the tetramer is Doesn't carbon have coordination number $6$ ...
0
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0answers
20 views

Calcium carbonate use as fertilizer?

Is the calcium carbonate that we find inside water pipes, the water tanks, and inside water air cooler the same calcium carbonate that used as fertilizer for plants? And can the water from an air ...
1
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2answers
42 views

Hybridization of the (valence - expanded) sulfur in Sulfur Dioxide

One of the canonical structures for sulfur dioxide - $\ce{SO2}$ - has sulfur (with a lone electron pair) double bonded to each oxygen atom to form a total of 4 bonds for sulfur - which can be achieved ...
8
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1answer
639 views

Weird Wikipedia Section on Oxidizing Behavior of Nitric and Sulfuric Acids

It has been my understanding that when nitric, perchloric, or sulfuric acids act as oxidizing agents, they must exist as whole $\ce{HNO_3}$ or $\ce{HClO_4}$ or $\ce{H_2SO_4}$ molecules that are still ...
4
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0answers
40 views

How to compare the oxidizing power of perhalate ions

In my book the oxidizing power in descending order of the following is given as: $\ce{BrO4-} > \ce{IO4-} > \ce{ClO4-}$ My doubt is regarding their order of oxidizing tendency. I thought that ...
9
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2answers
2k views

Is there a difference between NaCl or table salt (processed) and salt from the Himalayas?

So, I was doing some research on bonding and electronegativity and one of the examples used was NaCl (Sodium Chloride) which is salt. We don't buy processed salt, rather we buy salt from the ...
2
votes
2answers
48 views

How does a copper piece added in nitric acid change after nitrogen dioxide starts appearing?

There's an experiment I have no way of performing but want to know its results. The instructions (in short) are: Dip a piece of copper in a glass of concentrated nitric acid, $\ce{HNO3}$, using a ...
-2
votes
1answer
74 views

Why does Sulfur have 12 valence electrons in the Sulfate ion? [duplicate]

So I am completely and utterly confused about why sulfur has 12 valence electrons. I understand in it's configuration, it has 2 electrons for the 3s subshell, and 4 electrons from its 3p subshell, and ...
0
votes
1answer
35 views

Oxidation state of Cu and Fe in Chalcopyrite

What is the oxidation state of Cu and Fe in chalcopyrite($\ce{CuFeS2}$)? Some sites tell that $\ce{Cu(I)Fe(III)S2}$ and other tell $\ce{Cu(II)Fe(II)S2}$ Which is right? Background: I am 12th grader ...
0
votes
2answers
40 views

How can I recover PbNO3 from PbI2?

I'm a chemistry school teacher. I want to know how to recover lead Nitrate from the ppt of PbI2. I know I can do it using conc HNO3 but I do not know if NO or HI will form. Also I would need a guide ...
0
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0answers
28 views

When Iodine is shaken vigorously with hexane, 2 layers form. Which one is which?

I know that the top layer is purple, and the bottom layer is colourless. Is the top layer Iodine while the bottom layer is hexane? Why does a colour change happen?
1
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2answers
19 views

Problems with creating sodium hydroxide from sodium (hydrogen) carbonate

If sodium hydrogen carbonate (baking soda, $\ce{NaHCO3}$) is heated to greater than $50~\mathrm{^\circ C}$, it will release carbon dioxide and water to form sodium carbonate: $$\ce{2NaHCO3 -> ...
14
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1answer
381 views

Why does sodium produce predominantly sodium peroxide when burned in air?

From Wikipedia's article on sodium: When burned in dry air, it forms primarily sodium peroxide with some sodium oxide. We know that sodium has a strong reducing capacity, so why does it produce ...
1
vote
1answer
36 views

What is the difference between a ligand and a co-ligand?

I've seen the word co-ligand pop up in several papers. Is there a particular difference between a co-ligand and a ligand? Thank you.
-1
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0answers
13 views

Sn-1 and Sn-2 positions

When reading about phospholipids, it talks about sn-1 and sn-2 positions. What does this refer to? (Sn?)
1
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0answers
42 views

How to find the composition of unknown compounds based on the products formed by characteristic reactions of them?

$\ce{A1}$ and $\ce{A2}$ are two ores of metal $\ce{M}$. $\ce{A1}$ on calcination gives a black precipitate, $\ce{CO2}$, and water. On reaction with dilute $\ce{HCl}$ and $\ce{KI}$, $\ce{A1}$ gives ...