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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24 views

Haber process and calcium catalyst

According to the Wikipedia article History of the Haber process, one of the catalysts that Fritz Haber tried with success in his nitrogen fixation process is calcium metal. It is known that calcium ...
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How to divide water when molarity of 2 solvents are given

So i need to divide 20.6 ml of water and molarity of barium nitrate is 0.15 and aluminium nitrate nonahydrate is 1.65.Do i just any amount of vol of water for barium nitrate and the rest for aluminium ...
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Reaction of sulphur with calcium carbonate

Can sulphur react with calcium carbonate to form sulphur trioxide and calcium carbide, as the energy of 3(S=O) is greater than ((C=O) +2(C-O))?
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Creation of BF3 from B2O3 [duplicate]

Why can't you prepare Boron Trifluoride by reacting B2O3 with Carbon and Fluorine? B2O3 + 3C + X2 ---> 2BX3 + 3CO Why won't this work with Fluorine? (This is not a duplicate, as the question being ...
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Contact process for preparation of H2SO4 [on hold]

In the contact process for preparation of $\ce{H2SO4}$ , why we do a long process? Instead of this, we can also make $\ce{H2SO4}$ by diluting the acid which is used in its own preparation.
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When H2NCH2CH2PH2 acts a monodentate ligand, it is the phosphine end that chelates. Why is that?

In some occasions, if the ligand acts on Pd it do so as a monodentate ligand. I am attempting to explain this phenomenon but came into a block.
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How to calculate the number of atoms in a gas molecule?

$\pu{20 mL}$ of sulfur vapour at $\pu{1000 °C}$ reacts with $\pu{40 mL}$ of oxygen gas to form $\pu{40 mL}$ of sulfur dioxide gas. Determine the number of atoms in the molecule of sulfur in the vapour ...
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Separating ionic compounds at high temperatures [on hold]

I was wondering what would be the best way to separate NiCl3, FeCl3, TiCl2, and TiCl3 from a mixture of CaCl2, NaCl, KCl, and LiCl held at 600 degrees Celsius. Thanks. -James
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Reaction between Titanium II/III Chloride and nitrogen trichloride

I was wondering if titanium II chloride and nitrogen trichloride might react to produce titanium IV chloride at 600 degrees C. If not, what is produced? Also, I was wondering if titanium III chloride ...
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1answer
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Order of dipole moments

What is the order of dipole moments for $\ce{SO3, SiO2, P2O5,}$ and $\ce{Cl2O7}$? This question is from a book and the answer given is $\ce{Cl2O7 < SO3 < P2O5 < SiO2}$. Can someone explain ...
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Which theta should be taken from x-ray diffraction pattern for calculating Scherrer's equation?

We use Scherrer's equation to calculate crystalline size of a particle: $$d = \frac{Bλ}{β\cos{θ}}$$ But which theta should we take from the XRD pattern for this calculation? For example, the ...
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1answer
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Equilibrium Constant dependence

The equilibrium constant (EC) of a certain reaction is only dependent on temperature. For instance, suppose at a certain temperature, the EC of $\ce{A + 3B <=> 2C}$ is $K$. Now if I divide the ...
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Why the tendency of ClO3 to form dimer is high?

I read that tendency of $\ce{ClO2}$ to form dimer is less and that of $\ce{ClO3}$ to form dimer is more. I can understand the reason for the former because the unpaired electron is more delocalized ...
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Why does a tetrahedral molecule like methane have a dipole moment of zero?

I was studying chemical bonding when I noticed something odd. We say compounds like $\ce{CCl4}$ and $\ce{CH4}$ have a tetrahedral geometry (which is a 3D structure) but when we talk about their ...
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Why does fertilizer for hard water contain more calcium oxide?

I have seen this with multiple brands but I never understood why that is the case.
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Why doesn't the Pilling-Bedworth ratio of silicon cause issues in silicon technology?

According to Wikipedia, silicon has a Pilling-Bedworth ratio of 2.15. In theory this should mean an SiO2 film on silicon should have a fairly large amount of compressive stress and high probability of ...
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Does a complex that has no overall charge still have color?

The iron complex $\ce{[Fe(H2O)6]^2+}$ is colored but I'm wondering, if a pair of chloride ion is inserted on its secondary valency to form [FeCl2(H2O)6], does the complex loose its color or not?
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Catalyzing the breakdown of Si-O bonds

What catalysts can catalyze the breakdown of (Si-O) bond ? Can you mention some books(ebooks or hard cover) or websites that cover a lot of information about (Si-O) bond characteristics? I have ...
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Oxidation number of nitrogen in KCN

How can one determine the oxidation number of nitrogen in $\ce{KCN}$?
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1answer
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What ratio of bicarb to sugarcane juice with a pH level of 4.5-5.5 to neutralize pH level?

I am thinking of adding baking soda to sugarcane juice to eliminate the fruity acid that is present. The pH of sugarcane juice ranges from 4.5-5.5. I wonder how much baking soda should I incorporate ...
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1answer
35 views

How to predict whether a salt will act as an acid or as a base in aqueous medium? [on hold]

How to would we know if a salt such as $\ce{CO_2}$ reacts acidic or basic in water. The explanation I see everywhere is that you have to see the acid and base that makes up the salt, in the case of $\...
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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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1answer
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Flame Test: Why does the flame colour of calcium disappear quickly?

While performing flame tests for calcium fluoride and strontium fluoride, I observed strontium gives a long-lasting rose-red flame color but the brick red color for calcium quickly disappears. I also ...
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1answer
64 views

What would be the concentration of products in this calcium producing system?

I wanted to figure out a way to make calcium metal with potassium oxide. $\ce{K2O}$ undergoes disproportionation at $\pu{350-430 °C}:$ $$\ce{2 K2O -> K2O2 + 2 K}$$ Now, if I mixed in $\ce{CaO}$ (...
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Synthetic approach for precursor 1,1'-(bromomethylene)bis(1H-pyrazole) in ligand synthesis

Relevance During my Bachelor's project I focused on the synthesis of iron(II) complexes comprising a tetrapodal pentadentate ligand from the ligand family $\text{PY5R}_2\ (\text{R = H, Me, OH, OMe})$....
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How to balance a redox reaction [closed]

How should the reaction between ozone and potassium iodide leading to formation of iodine and oxygen gases be balanced (through changes in oxidation states of substances)?
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1answer
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Calculating bond dissociation enthalpy of F-F bond

$$\ce{N2 + 3 F2 -> 2 NF3} \quad ΔH = \pu{-263 kJ mol-1}$$ The bond dissociation enthalpies of the nitrogen triple bond and nitrogen–flourine bond are $\pu{946 kJ mol-1}$ and $\pu{272 kJ mol-1}....
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Structure and oxidation state of bridging complexes

I am confused about the structure of bridging complexes with the bridging ligands as $\ce{OH-}$ or $\ce{NH2-}.$ Aren't they both monodentate ligands? And if they form a simple coordinate bond, then ...
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1answer
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Why anhydrous copper sulphate is acidic in nature but pentahydrate copper sulphate is amphoteric? [closed]

$\ce{CuSO4}$ is acidic salt because it is made up of $\ce{Cu(OH)2}$ (weak base) and $\ce{H2SO4}$ (strong acid). But why $\ce{[CuSO4.4H2O]H2O}$ is amphoteric?
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Reaction of Lead(II) Chloride and Ammonia

While searching how to identify cations in a solution I found that ammonia could be used to distinguish between $\ce{AgCl}$ and $\ce{PbCl2}$ precipitates after $\ce{HCl}$ had been added. Why does ...
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1answer
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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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Hibridization of any element [duplicate]

I need a guide to learn about all hibridization techniques. Suggestions like a book,pdf,site would help me a lot!
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1answer
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Weathering steel

I'm building something out of weathering steel (A606). It is chemically formulated to rust until it becomes chemically stable and stops rusting. Its composition is: Carbon: 0.22%; Manganese: 1.25%; ...
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Find pH and concentrations of bicarbonate and carbonate in the rain droplet

The concentration of hydrogen ions in a rain droplet is $\pu{0.000141 M}.$ Calculate the $\mathrm{pH},$ the concentration of both bicarbonate and carbonate in the rain droplet by assuming that the ...
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How long does it take for H2O2 to dissociate inside water? [closed]

How long will it take a solution of 50mL 40% H2O2 to completely dissociate after being injected into a vessel containing 70L H2O (90% in the dark)? Temperature of H20 is 21C. I am doing this to kill ...
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Why decanted solution should be colorless when determining formula of unknown chloride?

I was following the guide “Stoichiometric Determination: Empirical Formula of Copper Chloride”. Under the Procedure section the following reaction is given: Producing solid $\ce{Cu}$ from a $\ce{Cu(...
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NH4NO3 + NaOH What is this weird floating precipitate?

In a reaction $\pu{110\\g}$ of $\ce{NaOH}$ and $\pu{90\\g}$ of $\ce{NH4NO3}$ are combined in approximately $\pu{500\\mL}$ of water. An unknown foam appeared. This foam however acts more like a ...
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What is the Charge on the NH3 molecules in Coordinate complex [closed]

In a coordinate complex $\ce{[Co(NH3)3Cl3]}$ why ammonia will not have any charge like in $\ce{NH4+}$ in both cases $\ce{N}$ donated its lone pair to cation.
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2answers
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I can't find reaction enthalpy ∆H for water formation reaction

$$\ce{1/2 O2(g) + H2(g) → H2O (l)}$$ The tabulated value is $\Delta H = \pu{−285.8 kJ/mol}$ I'm using the bond energies values for each molecule and for some reason, I am getting a different result, ...
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1answer
653 views

Mechanism for Chromyl Chloride Formation

This is the very famous chromyl chloride test, used for detection of chloride ion in solution - $$\ce{K2Cr2O7 + 4NaCl + 6H2SO4 -> 2CrO2Cl2 + 2KHSO4 + 4NaHSO4 +3H2O}$$ When a mixture containing ...
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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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Stability of Transition Metal Carbonyls [closed]

Inside a transition metal group does the thermodynamic / kinetic stability of carbonyl complexes increase or decrease? For example: Cr(CO)6 Mo(CO)6 W(CO)6
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Br- and I- ions give layer test, but Cl- ion doesn't. Why? [closed]

One of the questions I found in an NCERT book. Interestingly I could not find the answer anywhere on the internet. Hence, stack exchange.
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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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How pure gold is obtained back from dissolved state in Aqua regia?

I know Aqua regia is used for purifying gold by dissolving gold in it, but how that dissolved gold is obtained back in the pure state? I searched everywhere, but I didn't get the answer. So, I am ...
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1answer
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Sodium metal burning off when conducting electrolysis and I don't know why

I melted down some table salt and used high voltage welder power source to try and separate the sodium and chlorine it was partially successful because I could smell and see chlorine gas but during ...
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Doubts Regarding Activators for Non Sulphide Compounds in Froth Floating Method of Concentration of Ore

I was recently going studying about Metallurgy and read in a book namely Concise Inorganic Chemistry by J D Lee that the process of froath floating can also be applied to ores such as Malachite (CuCO3....
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1answer
62 views

Aqueous copper and how it reacts with NH3

I have learnt that you can test whether an unknown metal is copper by doing a simple test tube reaction. The reaction involves adding aqueous $\ce{NH3}$ to the test tube which contains the copper. ...
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1answer
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Why does only the cis-isomer of potassium dioxalatodiaquochromate(III) form?

A friend of mine performed a standard synthesis reaction of potassium dioxalatodiaquochromate(III) by adding potassium dichromate to ethandioic acid dihydrate and a little water. The synthesis ...
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Why is hypochlorite a stronger oxidizing agent than other oxychlorides?

The reduction potentials of perchlorate, chlorate, chlorous acid and chlorine dioxide in acidic and basic solutions are listed in the table below: $$ \begin{array}{lcc} \hline \text{Oxychloride} & ...