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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How to use Sodium Thiosulfate for fixing dicopper (I) tetraiodomercurate (II) and mercury (II) iodide?

DISCLAIMER DO NOT TRY TO DEMERCURATE USING DESCRIBED PROCEDURE. CONSULT YOUR EMERGENCY SERVICE. I found a discrepancy between a government-approved procedure of living quarters demercuration and the ...
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Effective Atomic Number stability comparison for equidistant values

EAN(Effective Atomic Number):- The amount of electrons around the central ion. EAN=(Atomic number - oxidation state)+(Number of electrons donated by ligands) Sidgwick's EAN Rule:- Sidgwick suggested ...
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Potassium permanganate structurre

So I'm learning about Lewis structures for university. I was reading a book written by some teachers from my university and in one exercise they ask us to draw the Lewis structure for potassium ...
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Invisible spin allowed transitions in Tanabe-Sugano diagrams

In class we are looking at Tanabe-Sugano diagrams, more concretely at transitions for a d2 complex. I understand that the only spin allowed transitions are those that have a triplet state, therefore ...
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What is the difference between boron trioxide and boric anhydride?

In my chemistry textbook, both boron trioxide and boric anhydride given under the same formula ( B2O3 ), so why are there names different? I tried googling the question but didn't find any ...
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What is left over when water and sodium hypochorate decompose, i.e. household bleach? [duplicate]

I am having some confusion in understanding the decompostion of household bleach. One website says bleach decomposes to salt and sodium chlorate, simple enough. Orther wedsites say bleach decomposes ...
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Does 50% hydrogen peroxide dissolve gold?

We have seen that the silver electrodes on a piezo element are being seemingly dissolved by exposure to our mixture of $50\,\%$ hydrogen peroxide. I was wondering if we were to switch to gold ...
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Should I be worried about the waste from “sugar rockets” and other potassium nitrate fireworks?

"Sugar rockets" or sparklers made of metal fillings, potassium nitrate and some carbon compound are easily made, and there is a lot of tutorials and videos on the internet suggesting them as ...
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If X is not salt, then what is X? [closed]

I have a homework : Cu + Cl2 = X. The reaction occurs under ideal conditions. If X is not salt, then what is X?
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Calculate concentrations of ions after acid-base reaction given volumes and concentrations

A $\pu{35.0 mL}$ of $\pu{4000 ppm}$ $\ce{HCl}$ solution is mixed with $\pu{45.0 mL}$ of $\pu{0.1025M}$ $\ce{NaOH}$ solution. Assume volumes are additive. $$\ce{NaOH(aq) + HCl(aq) -> NaCl(aq) + H2O(...
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Why doesn't the $5s$ orbital involve in $sp^{3}d^{2}$ hybridization?

Consider a co-ordinate complex like $[CoF_{6}]^{-3}$ for example. Here the hybridization is $sp^{3}d^{2}$ by the Valence Bond Theory, as illustrated also in this solution to a question on the same: I ...
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Copper plating with electrolyte not working (Cu(OH)2 vs CuSO4)

I've been experimenting using electroplating, and I recently made a solution by placing two copper pieces connected to a voltage source, in water. I suspect that this created copper(II) hydroxide, as ...
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Equivalence point pH derivation of a tribasic acid

Considering $\pu{100 mL} \ \pu{0.1 M} \ \ce{H3A}$ and $\pu{0.1 M} \ \ce{NaOH}$ titration curve: I understood the half equivalence points, but couldn't understand the reason why $\mathrm{pH} = \frac{1}...
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Why is the disordered CuAu structure more stable at high temperatures?

I know that the disordered CuAu structure is based around FCC whereas the ordered CuAu structure is tetragonal. Why would the FCC structure be more stable at high temperatures? For context, I was ...
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Why do actinium and thorium donot have electrons in f orbitals? [duplicate]

The reason for the exceptional configuration of actinium and thorium
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If the current is kept to zero in a potentiometric cell then how do electrons move from one electrode to the other?

If the current is kept to zero then how do electrons move from one electrode to the other electrode? How would the reduction happen if electrons don't move from one electrode to the other electrode?
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Is there a literature value for the activation energy for the reaction between sodium metabisulfite and potassium iodate

I am doing an experiment where I perform an iodine clock reaction between sodium metabisulfite and potassium iodate. I have an experimental value for this reaction but I need a theoretical literature ...
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What is an effective coagulant/flocculant for an acidic solution?

The acidic solution is a mixture of dissolved ammonium sulfate and mono-ammonium phosphate (pH about 4.5-4.8) along with an inorganic sludge with a similar consistency to clay I am looking to remove ...
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Equilibrium of zinc ion with ammonia

In my chemistry lab, we are testing the amphoteric properties of this metal. I understand zink can react with an acid or a base to form different compounds in solution based on pH. In one part of the ...
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Are we technically reducing electrodes/wires for the instant that an electron passes through them?

In lecture I was taught that, in a galvanic cell at standard conditions, platinum is often used as an inert electrode when the species being oxidized or reduced exists only in solution, because ...
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In the aquation of cis-platin, why are the chloride ligands, and not ammonia, replaced with water, despite chloride's larger trans effect?

https://doi.org/10.1021/ic000847w In this paper, the aquation of cisplatin is examined. When used to treat cancer, the chlorides are substituted with water molecules, which seems to go against the ...
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Why do both bonding and antibonding molecular orbitals exist at the same time when two waveforms could only be in-phase or out-of-phase? [closed]

I am quite confused concerning the existence of both bonding and antibonding molecular orbitals. I understand from previous posts that the number of orbitals has to be conserved, and thus when two ...
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Can you dissolve latex balloons to remold into other latex objects?

I want to take balloons from the dollar store and dissolve, then reform them into complex shapes (like a human head) balloons. Is this possible?
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Why is the increase in covalent radius from As to Bi not as big as from N to P?

The following is the radius of Group $15$ elements: $$\begin{array}{c|c} \hline \text{Element} & \text{Covalent Radius }(\pu{pm}) \\ \hline \ce{N} &75 \\ \ce{P} &110 \\ \ce{As} &...
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Is [Fe(OH)(H2O)5]+ more likely to be oxidized than [Fe(H2O)6]2+?

I want to know if the $\ce{[Fe(OH)(H2O)5]+}$ ion formed upon adding water to $\ce{[Fe(H2O)6]^2+}$ is more likely to be oxidised to $\ce{Fe^3+}$ than $\ce{[Fe(H2O)6]^2+}$. If it is, then why?
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Why do only some metals make protective oxide layers?

Almost all Alkali metals and Alkaline Earth metals react with air to form their respective oxides, but why does only Magnesium forms a protective oxide layer? What properties of magnesium oxide allow ...
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Finding a Mistake Calculating the pH of Ammonium Acetate

I'm trying to calculate the $\mathrm{pH}$ of a $\pu{0.10 M}$ solution of ammonium acetate, and I am struggling to find what mistake I am making within the following calculations: We know that $\dfrac{[...
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D-orbitals of point group C2v

I'm trying to construct an MO diagram for cisplatin, which has C2v symmetry. However, there is no Mulliken label for the d(x^2-y^2) orbital in the character table. Does this orbital not form molecular ...
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Getting an “index” of 7 for a Set of Powder Diffraction Data

I know a value of $h^2 + k^2 + \ell^2 = 7$ is not allowed but I cannot understand where I am going wrong with the indexing here. Any insight would be greatly appreciated as I am wondering if this is ...
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Allotropic varieties by atomicity

Are oxygen and phosphorus elements that have allotropic varieties due to atomicity? There are $\ce{O2}$ (oxygen gas) and $\ce{O3}$ (ozone gas), as well as $\ce{P4}$ (white phosphorus) and $\ce{P_n}$ (...
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Color of Flame Test for Alkali Metals

Lithium is known to have the highest ionization energy among Group 1 elements. Also, characteristic colours in the flame test arise due to the excitation and de-excitation of electrons. Then why ...
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Struvite Crystals: How does it form?

I'm in general chemistry, and I was wondering how ionic species crystallize and form the shapes they do, specifically in regard to the Struvite precipitate $\ce{MgNH_4PO_4. 6H_2O}$. Deconstructing the ...
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How can platinum function as an “inert electrode” while having a standard reduction potential of 1.2 from its 2+ oxidation state?

In lecture I was taught that, in a galvanic cell at standard conditions, platinum is often used as an inert electrode when the species being oxidized or reduced exists only in solution, because ...
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How do acids prevent ferrous sulfate from getting oxidised?

If $\ce{FeSO4.7H2O}$ is dissolved in an acidic environment, for example in 0.05 M aqueous solutions of methanoic or ethanoic acid, would that prevent it from getting oxidized if an oxidizing agent ...
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Comparison of C=O bond strength in metal carbonyls

Find the weakest $\ce{C=O}$ bond among $\ce{[Mn(CO)6]+},$ $\ce{Fe[(CO)5]},$ $\ce{[Cr(CO)6]}$ and $\ce{[V(CO)6]-}.$ I thought the $\ce{C=O}$ bond strength would be lowest in $\ce{[V(CO)6]-}$ since the ...
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H2SO4 + NaCl Need help with the reaction [closed]

I wanted to make some HCl so, I reacted dilute H2SO4 was bought from the battery shop and iodized salt together, but I get a yellow solution that's acidic in nature. I am not sure about the purity of ...
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Comparison between bond length of platinum and titanium oxides

This question comes from a problem sheet I recently had. It concerns the fact that Pt-O bond lengths are typically longer than Ti-O ones, even though the radii of the two metals are similar. My ...
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Why is calcium and ammonium perchlorate soluble but not potassium perchlorate?

Why is potassium perchlorate's solubility 0.76 g/100 mL (0 °C) but ammonium perchlorate and calcium perchlorate have 11.56 g/100 mL and 188 g/100mL (20 °C) respectively?
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Green deposition on the anode after electrolysis of sodium bicarbonate solution in tap water

I use $\pu{12 V}$ battery with copper wires and tap water with $\ce{NaHCO3}$ dissolved in it. I connected the battery and everything went as expected but after 5 minutes bubbling stopped. I took out ...
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Why is magnesium sulfate more soluble in water than that of strontium and calcium sulfates?

Magnesium sulfate is soluble in water. Its solubility is $\pu{26.9 g}/\pu{100 mL}$ at $\pu{0 ^\circ C}$ $(\pu{35.1 g}/\pu{100 mL}$ at $\pu{20 ^\circ C})$.[1] However, both calcium sulfate $(\pu{0.21 g}...
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Comparing the zero point vibrational energies of DCl and HCl

(a) Compare the zero point energy (i.e. $E_0)$ in joules for $\ce{H^{35}Cl}$ and $\ce{D^{35}Cl}$ (assuming both are anharmonic oscillators). (b) Explain the effect this will this have on their ...
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Solubility of metal Hydroxides in excess Sodium Hydroxide (excess NaOH)

I recently came across a question which asked me to find out which metal hydroxides are soluble in excess $\ce{NaOH}$ solution. Number of hydroxides which are soluble in excess of $\ce{NaOH}$ among ...
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Why would substitution of H with D alter chemical shift?

The $\ce{^{119}Sn}$ chemical shift of the dimeric tin hydride shown below (R=terphenyl) changes on addition of $\ce{D2}$ from a 1:2:1 triplet at $\pu{657.9 ppm}$ (due to coupling between $\ce{Sn}$ and ...
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Reactivity of group 13 elements with nitrogen

Do all group 13 elements react with nitrogen to form nitrides of form $\ce{MN}?$ J.D. Lee's Inorganic chemistry book mentions the following: Aluminium burns in dinitrogen at high temperatures ...
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Can % location of electron on metal or ligand be negative (EPR)?

Given an EPR spectrum of [Co(3-methoxysalen)(py)] : and equations: A(x) = A(iso) + B A(z) = A(iso) - 2B %Co in SOMO = B/B0 where A(x) and A(z) are hyperfine coupling constants measured from the ...
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Calculating atomic mass of unknown element in given compound (gas) at STP

A gas $\ce{X2O5}$ has the density of $\pu{5 g L-1}$ at STP. What is the atomic mass of $\ce{X}$ given $A_\mathrm{r}(\ce{O}) = 16?$ Note: The problem is my homework for school and has been translated ...
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The complex [Cr(NH3)6]3+ is a high or low spin complex?

Why is it correct to say that this complex $\ce{[Cr(NH3)6]^3+}$ is a high spin complex? I thought it was a low spin complex because $\ce{NH3}$ is a strong ligand, but in an exercise, I have to explain ...
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Why does dilithium have a longer bond length than dihydrogen?

I've tried MO theory however they both have a bond order of 1. Which means we can not relate the bond order to the bond length. My thinking - I think that the h2 bond length is shorter due to only ...

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