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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What's the chemical reaction involved when adding Caesium to water?

According to the Notting Hill and Ealing High School, the reaction of caesium $\ce{Cs}$ with water $\ce{H2O}$ gives the following equation, $$\ce{2Cs (s) + 2H2O (l) → 2CsOH (aq) + H2 (g)},$$ producing ...
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Gas chromatography and retention time

I did an experiment of gas chromatography which contained the compounds: octane, butanone and propanol. We injected a mixture of the three compounds in the polar column and then a mixture of it in the ...
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Oxidation of Magnesium with Nitric Acid

Write an unbalanced equation for the following: Magnesium metal is added to dilute nitric acid. My attempt: Nitric acid commonly oxidizes metals and gets itself reduced in the process - to $\ce{NO}$ ...
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713 views

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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491 views

In brown ring test, how is NO^- formed?

$$\ce{NO3- + 3[Fe(H2O)6]^{2+} + 4H+ -> NO + 3[Fe(H2O)6]^{3+} + 2H2O}$$ $$\ce{NO + [Fe(H2O)6]^{2+} -> [Fe(NO)(H2O)5]^{2+} + H2O}$$ I read that in the brown ring complex $\ce{[Fe(NO)(H2O)5]^{2+}...
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143 views

Boiling points of Hydroxylamine and water

Why does $\ce{NH2OH}$ have a lower boiling point than water? According to Wikipedia, hydroxyamine has a boiling point of 58 °C. Could this be due to the extent of hydrogen bonding among both molecules?...
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69 views

Literature values for NaCl Eutectic - Calculating the eutectic

For the NaCl eutectic I've seen two values widely used: 23.3wt% NaCl - James G. Speight: Lange's Handbook of Chemistry 2017) 5.1 M NaCl (Marion + Kargel 2008 - Cold Aqueous Planetary Geochemistry ...
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76 views

Strength of OH bond

This question might seem a little general, but how can we know the strength of the OH bond of third period element hydroxides? Does it increase across the period or does it decrease?But more ...
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26 views

Cyanamide mesomeric contributors

Which form of the cyanamide ion is more stable? As per the resonance rules, I find both of them equally stable as number of bonds is the same, more electronegative atom has negative charge and so on. ...
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52 views

Theoritical amount of Sodium Bicarbonate

I have to find the theoretical amount of sodium bicarbonate. The steps I followed in order to produce it are: 15g $\ce{NaCl}$ are added to a beaker. Then we add 87.5 mL of $\ce{NH3}(12M)$ We add 115g ...
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332 views

Production of fluorine gas

I have to suggest a method in order to produce $\ce{F2}$. It also says that I should consult the redox potential values. I know that there is a way to produce fluoride which is: $$\ce{K2[MnF6] + 2 ...
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92 views

Does this freezing point depression problem make sense?

The solvent is water. Pure water has a freezing point of 0 degrees Celsius. How come, in this problem, the addition of solute results in an elevation of the freezing point from 0 to 0.46 degrees C? Is ...
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Order of Basicity of Nitrogen Trihalides

I was asked to arrange nitrogen tri-halides in order of increasing basicity. On looking up the answer online, it turned out to be the following: $\ce{NF3}$ < $\ce{NCl3}$ < $\ce{NBr3}$ < $\ce{...
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Band gap difference in different allotropes of Group4 materials

Diamond and bulk Si are both Group 4 elements found in their $sp^3$ hybridized states, having bandgaps of around 5.3eV and 1.1eV respectively, but Graphene and Silicene are both $sp^2$ hybridized ...
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92 views

pH(H3O+ ion concentration) of a mixture of 2 weak acids

I need to find out the $\ce{H3O+}$ ion concentration in a mixture of 2 weak acids $\ce{HA1}$ and $\ce{HA2}$. They will be ionised as $$\ce{HA1 + H2O <=> A1- + H3O+}$$ And $$\ce{HA2 + H2O <=&...
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107 views

Formation of complexes by ferric ions is more frequent than ferrous ions. Why?

Looking at the electronic configurations of ferrous and ferric ions they are d6 and d5 systems respectively. Hence, ferric ions are more stable. But in octahedral complexes like hexathiocyanates, the ...
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538 views

Which has highest solubility in water?

Among $\ce{LiF}$, $\ce{LiCl}$, $\ce{LiBr}$ and $\ce{LiI}$ is $\ce{LiI}$ the most soluble compound ? As the lattice energy depends on size and smaller the size of ions greater the lattice and as $\ce{...
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Simplified Chromatography - will this work?

I am interested to separate a sample matrix via a method very similar to chromatography. The reason I am asking about this is because I am planning to integrate this method with my SERS application. ...
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369 views

Titration of hydrochloric acid with sodium hydroxide

I have a question regarding titration of hydrochloric acid with sodium hydroxide. Assume you have a solution of NaOH with pH = 12. With this NaOH you titrate a HCl solution. Then, will the pH of the ...
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501 views

Qualitative Analysis of Different Cations

So, we were taught in lab how to identify a couple of cations and anions through elimination and confirmatory tests. I was wondering, however—how would this work if the test solution were made up of ...
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462 views

Difference between ionization enthalpy and work function?

The work function is stated as the energy required to eject an electron out.. And ionisation enthalpy is stated energy required to move an electron out of the gaseous atom. I don't understand if there ...
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461 views

Interaction between Ozone and Carbon Dioxide

We are trying to predict what will happen when carbon dioxide gas is introduced into a contact chamber that serves as an ozone contact chamber. These contact chambers presently oxidize compounds found ...
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553 views

What results from combining monopotassium phosphate, magnesium sulfate and calcium nitrate?

If I mix monopotassium phosphate, magnesium sulfate, and calcium nitrate together in aqueous solution, what chemicals will result? Are these safe to combine (i.e. any toxic gases, etc.)? I thought ...
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% Fe in a sample

Seems so simple but is confusing me as when I take into account final weight I don't get one of the answers. An iron ore was analysed by dissolving a $1.1324~\mathrm{g}$ sample in concentrated $\ce{...
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606 views

Why is copper(II) oxide green?

Copper(II) oxide is black, but when we find the percentage of oxygen in air by volume using ammonia, copper, and ammonium chloride, the color of $\ce{CuO}$ turns green. What is the reason for this?
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396 views

Why does boron fume in moist air? Is the following accurate?

I initially guessed it was due to the formation of $\ce{H3BO3}$ but am now doubtful. Does it have anything to do with $\ce{HCl}$ formation? If the question referred to a boron halide, I could answer ...
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24 views

Why lithium looses electron more easily than sodium according to electrode potential values?

As lithium is smaller in size than that of sodium, then sodium should loose electron more easily than lithium
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603 views

Half/fully filled orbital stability

Beryllium the configuration is [He] 2s2 i.e fully filled but still quite reactive Also in neon [He]2p4 , neither half filled nor fully filled, still quite stable compound (As it forms compound with ...
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Rules to identify the most stable resonance structures

While studying resonance from this Chemistry LibreTexts article, I found the rules to follow in order to decide which structure is the most stable. Among them: The structure with the least number of ...
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1answer
111 views

Synthesis of ZnO by wet chemical method and reducing particle size by ball milling

I synthesized bulk $\ce{ZnO}$ which is pure white in colour, but after high energy ball milling colour changes from white to yellow, why? Figure 1: Zinc oxide (courtesy of Wikipedia).
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367 views

Why are the nitrate salts hygroscopic?

Any metal is never extracted from its nitrate salt because nitrate salts are highly soluble in water, so flow away along with rainwater, or any other source. But why are the nitrate salts so ...
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439 views

hydrated halide structure

What is the structure of $\ce{LiCl.2H2O}$? I think when $\ce{LiCl}$ is put in aqueous medium, it will break into $\ce{Li+}$ and $\ce{Cl-}$. Then $\ce{H2O}$ will give LP to Li and hydrate it. But why 2 ...
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28 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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145 views

What are the isomers of a complex having a structure of M(AB)2C2?

Our instructor have us answer an isomerism problem of a crystal structure that has a form of $\ce{M(AB)2C2}$. I keep getting 9 isomers, which includes the optically inactive isomer, and my peers and I ...
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168 views

Why is moist hydrogen made to react with chlorine to give hydrogen chloride?

Moist hydrogen reacts with chlorine in diffused sunlight to give out hydrogen chloride. Why is moist hydrogen used? Why not dry hydrogen?
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A question about (H4CO4) presence

Does (H4CO4) exist as a relatively stable compound (like H4SiO4)?
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Is the following reaction possible?

I know that solutions in water of calcium/aluminim (resp.) chloride have [Ca(H2O)6]2+/[Al(H2O)6]2+ in them. I've heard that calcium/aluminim chloride hydrates decompose to the corresponding hydroxide ...
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Dehydration of calcium chloride hydrate

I know this might seem stupid, but I want to know the exact way of dehydrating calcium chloride hydrate, because Wikipedia says that "the hydrates of calcium chloride decompose w/o melting" and the ...
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24 views

simultaneous solubility equilibria

I have barium nitrate, ferric nitrate nonahydrate, and aluminium nitrate nonahydrate reacting with ammonium carbonate. It's a simple coprecipitation reaction. Now according to my understanding, there ...
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Reaction of hot sodium bicarbonate solution on aluminium foil

I was really curious about finding out how sodium bicarbonate reacts with aluminium metal. For this, I prepared a sodium bicarbonate solution and added a piece of aluminium foil to it. I scraped the ...
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What is the product of the reaction between hydrogen peroxide and ammonium thiocyanate?

Title. I saw a video showing 30% hydrogen peroxide being dripped onto ammonium thiocyanate. https://www.youtube.com/watch?v=fQju2e8CMPY I am wondering what the product of that reaction is. The people ...
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Inorganic Chemistry: atomic metal radius and coordination number

On the book "Atkins - Inorganic Chemistry" there is this table: So, if the Molybdenum has an atomic radius equal to 145 pm and this primitive cell is a body-centered cubic lattice (CN = 8), to know ...
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Using a weak acid to prevent the precipitation of Mg(OH)2

I have this exercise in my chemistry book, and I have been staring at it for so long but unfortunately I have no single idea what to do and where to start. I will be so thankful for any help. $0.05$ ...
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145 views

Which is more acidic HOF or HOCl?

My attempt to the question: We know that more polar the $\ce{O-H}$ bond, the more acidic is the compound. According to electronegativity, the $\ce{O-H}$ bond of $\ce{HOF}$ should be more polar than $\...
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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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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 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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73 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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264 views

Why is it important in the iodine clock reaction that there is only a small quantity of sodium thiosulfate?

These are 2 questions . Why is thiosulphate needed ? And why In small quantities ? I know that the thiosulphate reacts with the I2 to form I ions Why is that important though ?
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576 views

What is PPM in terms of air concentration?

When they say the $\ce{CO2}$ concentration is $\pu{350 ppm}$ what does this actually mean? Does this mean that if we took a sample of air say $\pu{1 m3}$ then $\pu{350 mg}$ of that cubic meter would ...