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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$\ce{\sigma h}$ symmetry of $\ce{Os(CO)4Cl2}$
Consider the molecule $\ce{Os(CO)4Cl2}$ with a drawing given below via Chemtube3d (link).
I thought in this molecule, if I drew a horizontal plane, then a $\ce{\sigma h}$ would be present i.e. A ‘...
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1answer
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Coloured metal complexes
I recently started researching the coloured compounds made from transition metals focusing on one with oxidation state II, so Mn, Fe, Co, Ni, Cu and Zn with all of them in hydrated metal sulfate ...
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Reaction between copper and silver(I) nitrate in aqueous medium
What is the reaction between $\ce{Cu}$ and $\ce{AgNO3}$ taking place in aqueous medium?
The answer given was:
"Only" oxidation of $\ce{Cu}.$
My concern is: how is only oxidation of $\ce{Cu}$ ...
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1answer
26 views
How can we find out the type of bonding present in a compound or a molecule?
For example, if the bonding in diamond, ice, MgO or CO2 is to determine, how can I find it out? How to determine van der Waals forces?
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Bond lengths in P₄O₁₀
According to JD Lee's Concise Inorganic Chemistry:
The double bond $\ce{P=O}$ in $\ce{P4O10}$ contains p(π)–d(π) backbonding, where a full p-orbital on oxygen overlaps with an empty d-orbital on $\...
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Atomic molecular theory [on hold]
Two pure gases of elemental composition X and Y are allowed to mix in a
chamber. When combined, these two gases produce a liquid with the
chemical formula XY2. Interestingly, the liquid product has ...
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0answers
19 views
How do you remove lumps in reagents without contaminating them?
I think desiccating the powdered reagent would help remove lumps (at least in preventing lump neoformation) but would desiccation alone collapse all lumps in a powder (say KCl as it lumps easily), or ...
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4answers
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What is “dot” sign in •NO?
What is "dot" sign in •NO? I know that it is radical nitric oxide, but I don't know if it is necessary to put the "dot". Is there any difference between •NO and NO?
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How to find the compounds in a solution/material [on hold]
I am trying to find the components (Nitrates, Magnesium, Sulphur, Calcium, Iron, etc) in my organic manure.
If I mix manure in distilled water how do I measure the presence of all the elements in the ...
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2answers
533 views
Testing thermite for chemical properties
I'm writing a movie in which a bunch of military explosive ordnance experts destroy a turbine with thermite and the local fire chief has to work out whether it is plain $\ce{Fe2O3}$ and aluminium ...
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1answer
37 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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0answers
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Redox problem involving Na2S and HSO4- [on hold]
I'm trying to complete a question on an assignment that says
Show all steps in determining the number of electrons an atom of sulfur loses when it changes from sodium sulfide to hydrogen sulfate ...
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1answer
37 views
How can I neutralise H2 gas without burning it? [on hold]
I was thinking of maybe making it bubble into a solution containing something that would react with H2 yielding either a dissolved substance or a precipitate from the reaction.
Maybe a solution with ...
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1answer
19 views
Dosing leaves with Zinc Nitrate for pollution experiment - Need specific concentration
I am trying to assess the pollution tolerance of an insect using Zn as a proxy. I have a supply of Zinc Nitrate Hexahydrate that I want to use to contaminate dried leaves (the insect's food). The LD50 ...
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0answers
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Can someone help me? I have already tried a dimensional analysis but I’m not sure if it’s correct [on hold]
This is how the problem is worded.
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0answers
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Aquaregia reaction time [on hold]
In what time does aquaregia dissolves metals?
If the time differs with different metal, on what factors does the time varies?
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2answers
44 views
Is this balanced redox equation correct? [on hold]
I'm trying to balance an equation using oxidation numbers
$\ce{MnO4^- + H+ + Cl- -> Mn^2+ + Cl2 + H2O}$
my suggestion:
$\ce{MnO4- + 8H+ + 5Cl- → Mn^2+ + 2.5Cl2 + 4H2O}$
the 2.5 $\ce{Cl2}$ is ...
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1answer
21 views
How do I calculate the proportion of respective conjugates of one base mixed with several acids (and/or conversely) at different temperatures? [closed]
How do I calculate the proportion of respective conjugates of one base mixed with several acids (and/or conversely) at different temperatures, and is there a free software tool that would allow me to ...
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0answers
26 views
“Hairy” corrosion on anodized alu-part in water
I got a water tank with a mechanical assembly in.
The assembly consist of parts of anodized aluminium mounted on stainless steel plates (AISI 304). This is submerged down in fresh water. The tank is ...
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0answers
21 views
Book Recommendations for Inorganic Chemistry Mechanisms [duplicate]
I am looking for a book which has details or basics to reaction mechanisms for inorganic chemistry for highschool level(preferably) or maybe undergrad level.
Basically I am looking for a book which ...
1
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1answer
35 views
Redox titration or iron(II)
The concentration of $\ce{Fe^2+(aq)}$ can be determined by a redox titration using
A. $\ce{KBr}$
B. $\ce{SnCl2}$
C. $\ce{KMnO4}$ (basic)
D. $\ce{KBrO3}$ (acidic)
Can anyone please ...
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0answers
29 views
Magnetic moment of Tb3+ complexes [closed]
Why can we determine magnetic moment of $\ce{Gd^3+}$ complexes by spin only formula even when it is a lanthanide??
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0answers
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how to determine stability of a compound? [closed]
How can you tell which compound is more stable ? For example which is more stable methane or methyl chloride or which one is more reactive?
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0answers
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Cement- Utilization of high sulfur limestone and high silica limestone for cement manufacture [closed]
We are manufacturing cement and basic raw material, i.e., Limestone is supplied from our Captive Limestone Mines. Limestone deposit is divided into different blocks.
One block is good cement grade ...
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0answers
29 views
What is the thing or factor affect on producing product AgCl solid ? Is there any theoretical technique we use to predict the state of product? [closed]
For instance: if two substance react together and produce a product, how to predict whether the state of the product is a liquid, solid, gas, aqueous, precipitate, or suspension? Do all of these ...
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0answers
24 views
Separation of Al(OH)3 from NaOH [closed]
I need to purify NaOH drain cleaner that had small aluminium beads mixed in.
Mix consist of over 99% NaOH by mass.
Any simpler methods than recrystallization?
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0answers
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Lead solubility [closed]
How to measure solubility of lead in a ceramic recipient ?
I make ceramic bowls with clay and then paint them with enamel. The enamel contains Pb. Although it is heated at around 1000 degrees (turning ...
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0answers
48 views
Cheap but efficient disinfectant / biocide for home lab
EDIT
I am forced to reword my question about a chemical mixing ratio.
I have seen in Wikipedia that peroxide ($\ce{H2O2}$) and Acetic Acid can be mixed to Peracetic acid - this is an equilibrium.
I ...
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1answer
36 views
What should be the molarity of HCl and H2SO4 acid so that they can be considered safe to touch? [closed]
I know $\ce{HCl}$ and $\ce{H2SO4}$ acid of concentration 17 M is dangerous and corrosive, but I wonder can we dilute these acids to the extent that they become safe to touch?
If yes, then what should ...
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1answer
20 views
Formal Charge in Coordinate covalent bonds [closed]
I am in an honors chemistry course right now and I would like to know the formal charges of the atoms in CO, my confusion is that because the bond is partially coordinate covalent, are the bonded ...
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1answer
38 views
Why is Potassium permanganate a better catalyst than Potassium Iodide? [closed]
I did an experiment measuring the activation energy of Hydrogen Peroxide with different catalysts. Potassium Permanganate seems to be a better catalyst as the activation energy was lower than the one ...
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1answer
46 views
Can I use litmus paper to test unknown liquid that contains a concentrated strong acid?
Can I use litmus paper to test unknown liquid that contains a concentrated strong acid (example $\ce{H2SO4}$)? Can concentrated strong acid destroy litmus paper?
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1answer
83 views
Reaction of potassium with water
In general, when we put potassium into water, it will produce potassium hydroxide and hydrogen:
$\ce{2K + 2H2O ⟶2KOH + H2}$
However isn't the following reaction also possible?
$\ce{2K + H2O ⟶K2O + ...
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0answers
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Can etching with KOH (no HF or TMAH at any point) remove the first SiO₂ layer?
If my aim is to produce an etch that can be quite rough will $\ce{KOH}$ (maybe mixed with some IPA) be able to remove the majority of the initial $\ce{SiO2}$ such that I could make a rudimentary diode?...
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0answers
27 views
Definition of early vs. late transition metal
Is there an accepted definition of an early or late transition metal? I think the late transition metals start at Group 8 (including Fe), but others have said Fe is not a late transition metal. I'm ...
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1answer
56 views
Method for removing CuO in an inert environment
Common oxides (i.e., CuO or Al2O3) are capable of removal via NaOH solution. However, I am interested in removing a copper oxide layer inside an inert (Ar glovebox) environment. Thus, the traditional ...
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0answers
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Synthetic Solution: How much nitric acid to add? [closed]
I am making a synthetic solution to imitate a real life situation. I am adding calcium nitrate to the solution to meet a target calcium level of $\pu{334 ppm}$. However, using excel calculations the ...
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0answers
53 views
How can the potential energy at the infinite energy level in an atom be zero?
I have recently learnt about atomic structure and the Bohr model of the atom and have observed a discrepancy between it and my previous knowledge based on physics.
For simplicity, assume the atom is ...
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1answer
28 views
Hydrogen peroxide and glycerol combination
Is the mixing of store-grade hydrogen peroxide 3% and glycerol in the ratio of 1:2 (V/V) at room temperature affecting the decomposition rate of hydrogen peroxide?
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If I have CHLORIDE concentration in mg/L how do I convert to TOTAL SALTS (NaCl) measured in ppt? In other words, I don't have TOTAL SALTS in mg/L [duplicate]
I am comparing my salinity data which I collected with a Refractometer that reads in parts per thousand (PPT) with recorded data collected in mg/L of chloride concentration - not TOTAL salts but just ...
1
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1answer
38 views
dipole–dipole interactions: OCR Sample Paper wrong? [closed]
I was doing OCR A Level Chemistry A, H432/01 Periodic table, elements and physical Sample Question Paper.
Question 6 was:
The boiling point of hydrogen bromide is –67 ºC.
The boiling point of ...
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0answers
29 views
Sulphuric acid in as oxidant [duplicate]
I find difficult to understand how do I get to the products of the following reaction:
$$\ce{2NaBr(s) + 2H2SO4(aq) -> Br2(l) + SO2(g) + Na2SO4(aq) + 2H2O(l)}$$
after checking the oxidation ...
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1answer
40 views
Acid etching of float glass
While we have done some etching of glass with hydrofluoric acid alone, to achieve a matte white finish on float glass, I am curious to know what formula and procedure is required to create a more ...
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1answer
67 views
Naming this iron complex: Fe2Cl6[H2O]5
This is the iron complex in question:
$\ce{Fe2Cl6[H2O]5}$
I'm pretty sure according to the nomenclature it should be: pentaaquahexachloroiron(III) but I wanted to check somewhere to be sure.
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0answers
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How to reduce the pH of a sodium hypochlorite solution
I want to reduce the $\mathrm{pH}$ of a commercially available bleaching solution containing sodium hypochlorite to a degree that $\ce{HOCl}$ becomes the predominant species in the solution (in ...
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1answer
49 views
What are the half reactions for the redox reaction between SO2 and iodine?
What are the half reactions for the redox reaction between $\ce{SO2}$ and iodine? The relevant chemical equation:
$$\ce{ SO2 + H2O + I2 -> H2SO4 + 2HI}$$
This is what I think it is, not sure if ...
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2answers
53 views
Identifying a chloride of the unknown element from the masses of chlorine and compound as well as vapor density [closed]
1 g of a chloride of an element contains 0.835 g of chlorine. If vapour density of the chloride is 85, find weight of the element and its valency.
I tried to solve it but couldn't get to the answer ...
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0answers
34 views
What reaction makes sodium silicate harden in CO2
I have looked all over the web, and I can only find information stating that it does happen. I don't doubt that I just can't figure out what is happening. Some sources state that an acid can cause the ...
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0answers
47 views
Magnetic behavior of sodium thio-nitroprusside
Is $\ce{Na4[Fe(CN)5NOS]}$ contains $\ce{Fe(II)}$ and $\ce{NO+}$ and hence diamagnetic, or $\ce{Fe(III)}$ and $\ce{NO}$ and hence paramagnetic?If in this molecule NO transfers one electron to $\ce{Fe(...
2
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1answer
66 views
Quantum numbers required to specify the position of an electron
In a test today, there was this question:
How many quantum numbers are required to specify the position of an electron?
$$(A)\ 1 \quad (B)\ 2 \quad (C)\ 3 \quad (D)\ 4$$
The answer key says ...
