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Questions tagged [inorganic-chemistry]

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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15 views

Find m of Na2S04? [on hold]

Can someone help me on this problem. A solution is prepared at 25 °C by mixing 25 g of Na2S04 with 150 cc of water. The density of water at this temperature is 1 g/cc/. What is the m of Na2SO4 in the ...
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How to check bond length in 2 bromo,1,3,5-trinitrobenzene [on hold]

Please give me answer as possible as of this question.
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0answers
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Find solute of Molecular Weight [on hold]

Can someone help me on this question. A 0.76 g of an unknown solute, X, is dissolved in 18.5 g of hexane and the solution is found to be 0.25m. What is the MW of solute X?
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Why does copper have a high enthalpy of atomisation when it has a fully filled d sub shell?

If I understood correct, the high energy of atomisation for d-block element comes from the ability to make many metallic bonds due to half electron filled d-orbitals, but it seems here that copper has ...
6
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1answer
555 views

How is taste of chemical compounds determined?

How do we know the taste of compounds, and their smell too, when some of them are poisonous. My textbook had that Lead is sweet in taste, but it's poisonous. So, how exactly do we determine their ...
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23 views

What is the order of [H2SO4] with regards to the reaction H2SO4 + CaCO3?

What is the relationship between the concentration of sulfuric acid and the rate of reaction of $$\ce{H2SO4(aq) + CaCO3(s) ⟶ H2O(l) + CO2(g) + CaSO4(aq)}$$ in the rate law: $$\mathrm{rate} = k[\ce{...
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1answer
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Why does mercury have low melting and boiling points?

Many metals have relatively high melting and boiling points, but mercury has relatively low melting and boiling points. What are the possible reasons for this?
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51 views

High temperature acids

Some of the proton production of an acid happens due to temperature and some of the proton production of an acid happens due to quantum tunnelling.But if we increase the temperature a lot the proton ...
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0answers
39 views

Structure of perchloric acid [on hold]

I was asked to draw structure of $\ce{HClO4}.$ I drew this: $$\ce{H—O—O—O—O—Cl}$$ But my teacher told me that it is wrong. He drew this: Why is my structure wrong and his correct?
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1answer
76 views

Nanocar racing competition and the race tracks used

In the Nanocar race competition the molecules are raced on a gold surface. Is there a specific property of gold that it forms a good "racetrack"? On what criteria does it compare with other metal ...
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3answers
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Stability of superoxides of alkali metals

Why are superoxide ions stable only in presence of large cations such as $\ce{K}$, $\ce{Rb}$ and $\ce{Cs}$?
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39 views

Stability of oxohalogen species

Why the higher oxides of a halogen are more stable than the lower ones? I know that the stability order of oxides of chlorine is $$\ce{HClO4} > \ce{HClO3} > \ce{HClO2} > \ce{HClO}$$ But I ...
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Gold and gold oxide redox reaction in water [on hold]

Can anyone tell me if a redox reaction of gold or gold oxide will occur in water around body temperature? I'm trying to figure out a redox reaction for two metals with saline being the conductive ...
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3answers
95 views

How Can I Induce Corrosion Electrochemically?

I'm very interested in measuring corrosion in metal alloys, particularly in salt solutions. I understand metals corrode over time, however, I was wondering if it's possible to electrochemically "speed ...
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0answers
30 views

Why does atomic spectrum of calcium obey bohr model?

We know that Bohr model can only define the atomic spectrum of single electron species.But during flame test,orange rays are emitted when calcium is heated.Our chemistry teacher taught its theory ...
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1answer
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1answer
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Use of cryolite and fluorspar in electrolytic reduction of pure alumina by Hall-Héroult process

Cryolite $\ce{(Na3AlF6)}$ and fluorspar $\ce{(CaF2)}$ are added to alumina to lower the temperature of the mixture from $\pu{2000 °C}$ to about $\pu{900 °C}$ and also to increase the conductance. But ...
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1answer
27 views

What determines the atom or molecule that receives electrons during oxidation?

I'm no chemist, so bear with me. From my understanding, the reason metal oxidation occurs is because the metal is losing electrons to the oxygen ions in the air; and that an ion is an atom or ...
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1answer
82 views

What happens when Ar and HCl are mixed at 77 K? [on hold]

So our teacher asked us a simple question in the classroom: What happens when Ar and HCl are mixed at 77 K? and no other information was given. We replied various possible answers for that such ...
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2answers
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Obtaining mercury from mercury(II) nitrate

I was thinking about obtaining mercury from mercury(II) nitrate. Is it possible? I've tried putting chunks of Fe into it, I've got the logic from the voltaic table (where Fe is on the left side of Hg, ...
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0answers
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Why does the metallic bond become weaker but the van der Waal's forces become stronger as the atomic radius increases? [on hold]

I just learned about the periodic table of elements. I was wondering what differences between van der Waal's force and metallic bond are. I'm just a rookie in chemistry. Can anyone please correct me ...
15
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1answer
705 views

Why do different elements form different types of carbides?

What property of the elements make them form different types of carbides like: $\ce{Be}$ and $\ce{Al}$ - $\ce{Be2C}$ and $\ce{Al4C3}$ (Methanides) contains $\ce{C^4-}$ ion $\ce{Na}$ and $\ce{Ca}$ - $...
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1answer
36 views

Order of reaction for hydrogen ions being ignored

I have been reading through a case study about calculating the order of reaction for the following reaction: $$\ce{H2O2 + 3 I- + 2 H+ -> I3- + 2 H2O}$$ The paper uses an iodine clock reaction ...
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22 views

Recrystallization [on hold]

Briefly describe using a suitable example, how in laboratory, you could purify an organic compound (which is suitable in hot water, but not in cold water), from a mixture of 2 contaminants, one of ...
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0answers
25 views

Why is [NiCl2(PPh3)2] tetrahedral and [NiCl2(PMe3)2] square planar?

I'm confused here since PPh3 is a strong field ligand and would try to make the molecule square planar but is bulky and would tend to adopt tetrahedral geometry to minimise sterric hindrance. And why ...
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0answers
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Melting Wood On A Serious Note [duplicate]

I wanted to ask this question for a long time. The question is Is it possible to completely melt wood(Literally change it to liquid) All I've been getting is contradictory answers. Help please!
3
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3answers
4k views

How do we predict the order of melting points of group 1 and group 2 halides?

I get really confused by this: The order of melting points of group 2 chlorides is: $$\ce{BaCl2 > SrCl2 > CaCl2 > MgCl2 > BeCl2}$$ This is completely understandable by Fajan's Rules. But,...
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0answers
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Solubility of Borax penta hydrate in water at various temperatures [on hold]

Solubility of Borax penta-hydrate in water at various temperatures from 20 to 100 Deg. Centigrade?
2
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1answer
160 views

Show the acid nature of hydrogen sulfide

We are studying the chalcogens at school. I should prove (show) the acid nature of $\ce{H2S}$ by writing two chemical interactions. I am really sorry if the terms I am using aren't the right ones. It'...
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1answer
54 views

Confused on how to draw cis-[Ni(H2O)4(NH3)2]Cl2 [on hold]

I got a question on my practice exam telling me to draw cis-diamminetetraaquanickel(II) chloride, but I'm not sure on how to place the two $\ce{Cl}$ atoms.
2
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1answer
80 views

Mixing cobalt(III) hydroxide and thallium(III) hydroxide

A simple question on solutions is driving me crazy. At this point, I think the textbook's wrong. Here's the question: A saturated solution of cobalt(III) hydroxide $(K_\mathrm{sp} = \pu{1.6e-44})$ ...
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1answer
34 views

Reference request on formate potash process

Wikipedia article on Potassium Formate mentions a so-called "formate potash process" for production of potassium, presumably referring to elemental metal. Concise encyclopedia chemistry by Mary ...
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1answer
37 views

What is a material more easily cut than shattered? [on hold]

I'm currently developing a sci-fi concept for animation which partially involves a typical "the earth has been overrun by XYZ" scenario. One of the ideas for XYZ we're thinking of is a species of ...
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0answers
35 views

Explain hydrolysis of nitrogen trichloride [closed]

Why vacant d orbital is necessary for hydrolysis of $\ce{NCl3}?$ What do those arrows on this image mean? What does the arrow pointing from N- bond to Cl mean?
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Titration and purity [closed]

Take 1 g of the prepared di-phosphate crystals After dissolving in distilled water, bring it to volume 2 on the Juji balloon Take 2 ml of it and titrate with normal sulfuric acid Determine the purity ...
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1answer
4k views

Bond dissociation energy order for C−C, N−N, O−O and F−F single bonds

Data from Chemistry LibreTexts — Strength of Covalent Bonds, Table 8.8.1: Average Bond Energies (kJ/mol) for Commonly Encountered Bonds at 273 K: $$ \begin{array}{cr} \hline \text{Bond} & D/\pu{...
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Why does NO2 exists as a neutral gas molecule, nitrite, nitronium?

Why does $\ce{NO2}$ exists as a gas molecule, $\ce{NO2-},$ $\ce{NO2+}?$ How are they different in structure and reactivity? I am confused how the same compound with same number of atom can have $+1,$...
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0answers
39 views

What is tetrasulfur like? Why is there so little experimental information about it?

Phys.org's How sulfur helped make Earth habitable before the rise of oxygen says Mapping the bonds and vibrational modes of molecules containing sulfur isotopes is helping to shed light on the ...
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0answers
47 views

What is the structure of phosphorus pentachloride in the solid state? [closed]

I thought the answer would be $\ce{PCl3}$ seeing as $\ce{PCl5}$ is highly reactive and axial bonds are supposed to be weaker, but the answer given in my text book is $\ce{[PCl4]+[PCl6]-}.$ Also, what ...
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0answers
19 views

Concentration of silver(I) after adding solid silver(I) carbonate to the solution of alkali metal carbonate [closed]

I'm having a bit of trouble with this question: What is the concentration of $\ce{Ag+}$ ions if $\pu{0.050 g}$ of $\ce{Ag2CO3}$ is added to a $\pu{1 L}$ solution of $\pu{0.1 M}$ $\ce{Na2CO3}$ at $\...
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0answers
38 views

Why is the boiling point of HI greater than that of HBr? [closed]

Since iodine is larger than bromine shouldn't hydrogen polarize iodine leading to the formation of covalent compound which has a lower boiling point?
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2answers
72 views

Why does not aqua regia burn filter paper?

We were doing basic radical analysis in lab and we were asked to add aqua regia on the filtered PPT collected on the filter paper and collect the formed solution , my question is if aqua regia can ...
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1answer
76 views

Chemical Anti-bonding and Pauli repulsion [closed]

We can explain chemical anti-bonding just using the Pauli repulsion correct?Let's take He2. 2 atoms of He share 4 1s electrons and since the magnetic spin for electrons has 2 values there would be 2 ...
4
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1answer
64 views

What is the electrochemical reaction of this battery?

I've watched a YouTube video "Soda Can Battery - Power From Trash - DIY Project" by Source Port Services. I understand that the anode can be oxidised, but what is the reduction reaction at the cathode?...
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0answers
32 views

Boiling nitric acid and gold plating

I was watching a YouTube video "Home Brew Gold Plating" by Cody'sLab and had a few questions. In the video to dissolve the gold first he creates a mixture of $\ce{HCl}$ and $\ce{HNO3}$ (aqua regia). ...
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0answers
17 views

calculate the enthalpy of solution for ammonnium chloride [closed]

What is the change in temperature when 3.00 grams of ammonium chloride is dissolved in 100 mL of water? change is temp was -1.99 Given the change in the temperature from adding 3.00 grams of ...
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1answer
32 views

Isomerism and namegiving

Is this the right chemical formula of the $\ce{Rb[Pt(NH3)Br2Cl]}$ complex: rubidium amminedibromidochloridoplatinate(II)? And is it correct that it has geometric isomerism, being square planar with a ...
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1answer
32 views

Methylammonium lead(II) iodide perovskites in bulk form

I am trying to obtain $\ce{(MA)PbI3}$ as a bulk powder using lead(II) iodide and methylammonium iodide as precursors. I have not yet tried simply mixing the two in methanol/ethanol and removing the ...
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0answers
37 views

What is formed when Fe reacts with O2 (dioxygen)? [closed]

I mean metals react with oxygen to form metal oxides. So what I wish to know is that whether it will form FeO (ferrous oxide) or Fe2O3 (ferric oxide) and why?