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 to do when there is an odd number of valence electrons left on the the central atom?

For example, I'm trying to write the formula for $\ce{NO}$, and $\ce{ClO2}$. If you count the total number of electrons in these molecules, it's odd. This means that no matter how you arrange the ...
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Meaning of $\ce{(Si,Al)}$ in $\ce{XY(Si,Al)2O6}$ [duplicate]

On the wikipedia page for pyroxene minerals, it says that pyroxenes have the general formula $\ce{XY(Si,Al)2O6}$, "where X represents calcium (Ca), sodium (Na), iron (Fe II) or magnesium (Mg) and ...
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Mass Spectrometry

I am struggling with the problem below : "When a sample containing a mixture of isotopes is introduced into a mass spectrometer, the ratio of the peaks observed reflects the ratio of the percent ...
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Hybridization of O in ocl2

In OCl2 when we talk about hybridization of Oxygen, we say it's sp3 even if there is back bonding happening, but when we discuss the same in N(SiH3) 3 we say due to back bonding the hybridization of N ...
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Why does Dicobalt octacarbonyl follow 18 electron rule?

Dicobalt octacarbonyl is basically a dimer of cobalt tetracarbonyl. Cobalt has 9 valence electrons and each carbonyl donates 2 electrons each. Total electron count= 17. So, the total valence electron ...
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Why does Chloride ion get oxidized in electrolysis?

Suppose I have an NaCl solution in a beaker and I put two electrodes in the jar, the ends of which are connected to a normal AA battery (1.5V). Now, my question is, why is the following reaction ...
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Will current flow if only chloride ions are present in water? [closed]

Consider a hypothetical scenario: If I have a beaker of water, and I just put chloride ions in there and put in two electrodes that are connected to the two ends of a battery, will current flow? PS: ...
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49 views

Solubility of nitrogen dioxide in sodium hydroxide

I know $\ce{NaOH}$ can absorb $\ce{NO2}$, but I could not find any data of solubility of $\ce{NO2}$ in $\ce{NaOH}$ at room temperature and atmospheric pressure. I am trying to figure out how much NaOH ...
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How to find the combining valence of an anion when it exhibits variable valency?

I'm doing an online course and can't for the life of me figure out how to write chemical formulas from the chemical name. Take the example of calcium chloride. I know the the valence for calcium is ...
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What is substituted in SN reaction? [closed]

Simple question. Wikipedia defines SN reaction to be: A nucleophilic substitution is a class of chemical reactions in which an electron-rich chemical species (known as a nucleophile) replaces a ...
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2answers
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The oxidation number of N and Cl in NOClO4 ​

My doubt is not about the solution itself, actually I was able to find the solution myself. We could split NOClO4 as (NO+) + (ClO4-) and then proceed, but here I "knew" this split. Is there ...
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Total entropy change for a spontaneous reaction

For the oxidation of iron, $$\ce{4 Fe(s) + 3 H2O(g) -> 2 Fe2O3(s) + 3 H2(g)}$$ the entropy change is $ \pu{–549.4 J K^{-1} mol^{-1}}$ at $\pu{298 K}.$ In spite of the negative entropy change of ...
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1answer
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Stability order of group 17 halides [closed]

Stability of halides decreases down the group since the size increases and charge density decreases, which leads to stability and we get the order of stability as follows: $$\ce{F-} < \ce{Cl-} < ...
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Problem understanding the rate of reaction of reversible reactions

Case 1: $$\ce{CH_3COOH + NaOH<=>CH_3COONa + H_2O}$$ At equilibrium, there remain extremely small concentrations of the reactants (acetic acid and sodium hydroxide), and comparatively large ...
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Smell produced in reaction of sodium hydroxide and aluminium

I was doing an experiment with $\ce{NaOH}$ dissolved in some $\ce{H2O}$ and aluminium. My textbook says that the following reaction takes place $$\ce{2 NaOH + 2 H2O + 2 Al -> 2 NaAlO2 + 3 H2}$$ It ...
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Why the product of ions in Kohlrausch's law [closed]

I'm having trouble wrapping my head around Kohlrausch law of infinite dilution and molar conductivities in general. Also is sum_of ion_conductivitiy * ion_concentrations (there are multiples ions so ...
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1answer
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Reaction between hydrobromic acid and sodium borate

Write the reaction for a a sodium borate solution being titrated by hydrobromic acid, assuming sodium borate is represented by $\ce{Na3BO3(aq)}$. I think this is a simple double replacement reaction: ...
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Stability of Iodine oxides

In my chemistry book, it is written that Iodine oxides are most stable oxides among halogens and the reason given is "due to greater polarization of bond formed between iodine and oxygen". ...
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2answers
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Mass of silver iodide that dissolves in ammonia [closed]

What mass of $\ce{AgI}$ will dissolve in $\pu{1.0 L}$ of $\pu{1.0 M}$ $\ce{NH3}?$ Neglect the change in concentration of $\ce{NH3}.$ Given: $K_\mathrm{sp}(\ce{AgI}) = \pu{1.5E-16};$ $K_\mathrm{f}(\ce{[...
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What is the balanced equation for the reaction of antimony pentachloride and iodine? [closed]

According to the Handbook of Inorganic Chemicals by Pradyot Patnaik, Ph.D. 2003, $\ce{SbCl5}$ reacts with $\ce{I2}$ to form $\ce{ICl}$ (Iodine monochloride). So far I got, $\ce{SbCl5 + I2 -> ICl + ...
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1answer
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Potassium from Potassium superoxide [closed]

Is it possible to get $\ce K$ from $\ce K{O_2}$ using a synthesis reaction? If yes, can you describe it?
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How can we recover potassium and phosphorus from ashes?

When plant based solid fuels, such as firewood, coal etc. are burned, their potassium and phosphorus content stay in the solid ashes. Quick search on the net shows ashes contain about 4% potassium and ...
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Weird equilibrium problem [closed]

I'll try to approach the equilibrium from both sides, and see what happens. Stay with me for the ride guys! Case 1: $$\ce{NH3_{(aq)} + H2O_{(l)} <=> NH4^{+}_{(aq)} + OH^{-}_{(aq)}}$$ Let the ...
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Why is the aqueous solution of ammonia considered alkaline? [closed]

$$\ce{NH3_{(aq)} + H2O_{(l)} <=> NH4^{+}_{(aq)} + \fbox{$\ce{OH^{-}_{(aq)}}$}}$$ Now one might say, due to the presence of $\ce{OH^-}$, the aqueous solution is alkaline. But I'd like to make the ...
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1answer
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Is my understanding of conjugate acid-base pairs correct? [closed]

$$\ce{HCl_{(aq)} + H_2O_{(l)}<=>H_3O^{+}_{(aq)} +Cl^{-}_{(aq)}}$$ Cl- is the conjugate base of HCl. Now, can I say that HCl is the conjugate acid of Cl-?
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pH of the solution [closed]

How much solution diluted solution (3%) of pH=1 (stock solution 30-50% HNO3) need I add to the diluted (1%) mixture of NaOH (30%) and KOH (5-15%)to turn the pH from 12 to 7. Volume of the solution ...
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What is in all paints that make paint stripper so effective?

Paint stripper seems to always works great on paints (it's the result we want, obviously), but what are inside paints that make it possible ? Is there paint that can't be removed by this method ?
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Dissociation of phosphorus pentachloride in gas syringe

Phosphorus pentachloride is introduced into an empty gas syringe which has a movable, tightly-f‌itting plunger. The gas is allowed to expand until equilibrium is reached at a temperature at which the ...
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1answer
65 views

Does fluoroantimonic acid dissolve noble metals?

Hello,Does fluoroantimonic acid dissolve noble metals? Nernst equation suggests that platinum would require pH ≈ −20.1 to be dissolved, using Hammett acidity function as an extension of pH ...
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How can one measure instantaneous ionisation ratio of a weak electrolyte?

Trying to get information about ionization ratio of weak electrolyte, led me to a few page with information about how to calculate it, but this will give me a static equilibrium answer. I'd like to ...
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Why does nitric acid react with less reactive metals [duplicate]

So we are studying the acid base chapter and I came across these reaction: $$\ce{3Ag + 4HNO3 -> 3AgNO3 + NO + 2H2O}$$ My question is, how can $\ce{Ag}$ react with $\ce{HNO3}$ as it is lower than ...
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Can someone explain this answer in detail? [closed]

The density of iron is $\pu{7.874 g/cm3}$ and its unit cell volume is $\pu{2.364E-23 cm3}$. These values indicate that there are: two Fe atoms per unit cell and the metal is body-centered cubic. I am ...
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What happens when you mix antimony pentachloride and hydrochloric acid? Will it form chloroantimonic acid? [duplicate]

Learning that fluoroantimonic acid, HSbF6, is produced by the reaction of antimony pentafluoride and hydrofluoric acid, I wondered if it would do the same for the chlorine. I have seen the other ...
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1answer
81 views

Why is the formation of the nitro isomer more favorable under acidic conditions

In the reaction between chloropenataamminecobalt and nitrite either the NO2 or the ONO linkage isomer is formed. This preference seems to be mainly due to the pH of the solution with acidic conditions ...
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2answers
201 views

Why do we need salt in a salt water battery?

I am having problems understanding why we do need salt added to the water to make this shown galvanic cell work. I understand that Zinc wants to dissolve into the electrolyte, resulting in $\ce{Zn^2+}$...
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2answers
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Balancing complex redox reaction in a basic solution [closed]

I'm incredibly lost right now. I understand fully how to balance redox reactions in acidic/basic solutions, but the problem my teacher posted is not letting me use the method taught to us. I've ...
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What is the difference between PEF and PTF bioplastics?

I am trying to research single use plastics replacements, and wanted to explain how PEF and PTF are a good choice. Although as I am researching I can't find clear information about them, also how they ...
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Sodium Polysulfide production from NaOH and Sulfur

Does the sulfur also oxidize the $\ce{OH-}$ radicals after the $\ce{Na2S4}$ chains form? Something like this: $$\ce{9S + 4NaOH -> 2Na2S4 + SO3 + H2O}$$
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What reaction does happen when molten sodium hydroxide reacts with aluminium?

The reaction between aqueous sodium hydroxide and aluminium follows this equation: $$\ce{2NaOH + 2H2O + 2Al = 2NaAlO2 + 3H2}$$ But it's obviously not possible to balance this equation without the ...
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Do hydrogen halides (HX) form strong or weak acids?

I know that when dissolved in water, hydrogen halides ($\ce{H-X}$), become acids. I know that $\ce{HF}$ forms a weak acid, but can it be generalized that all $\ce{HX}$ acids do so?
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Where does the free electron from from in Ag/AgCl reaction?

For the Ag/AgCl half reaction, where did the free electron that AgCl captured come from? Did it come from the Ag wire? If so, why would Ag wire give an electron to AgCl, both atoms are Ag and have the ...
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1answer
110 views

Why is comproportionation thermodynamically favoured for the synthesis of Mn(acac)3?

I'm currently learning about ligands in school and I'm wondering why does comproportionation happen in the overall equation? There are fewer chemical species on the product side and the entropy of the ...
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1answer
51 views

In cation analysis, can reagents of higher group precipitate lower group cations?

My teacher told me that Al$^{3+}$ and Zn$^{2+}$ hydroxides are frequently precipitated together and that is why we have to be careful about the concentration of base (NH4OH) added. Does this mean that ...
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Why does the reaction of sodium nitrate, aluminium, and sodium hydroxide yield ammonia?

From Russian test problem 4301: $$\ce{3NaNO3 + 8Al + 5NaOH + 18H2O -> 8Na[Al(OH)4] + 3NH3(g)}$$ How does ammonia evolve here? Is it that we get hydrogen gas evolving in the reaction between Al ...
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1answer
148 views

Spin-only magnetic moment of [Fe(en)(bpy)(NH₃)₂]²⁺

The one that can exhibit highest paramagnetic behaiour among the following is ($\ce{gly}$ is glycinato; $\ce{bpy}$ is 2,2ʹ-bipyridine): (a) $\ce{[Pd(gly)2]}$ (b) $\ce{[Fe(en)(bpy)(NH3)2]^2+}$ (c) $\ce{...
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1answer
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Why do bubbles form in the reaction Zn(NO3)2 + Mg→ Mg(NO3)2 + Zn [closed]

What are these bubbles? What reaction is taking place?
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2answers
382 views

How to balance this redox reaction taking place in a basic medium?

How to balance this reaction which is taking place in a basic medium? $$\ce{Al + MnO4- -> MnO2 + Al(OH)4-}$$ My Attempt Reduction half reaction: $$ \begin{align} \ce{4 H+ + MnO4- + 3 e- &-&...
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How can one reclaim isotopic cadmium from a solution of acid, i.e. H2SO4 or HCl etc.?

I have dissolved isotopic cadmium-114 with $\ce{H2SO4}$ and or $\ce{HCl}$. Now that I have the cadmium-114 in solution, precipitating out $\ce{CdSO4}$ and or $\ce{CdCl2}$, how can I reduce these ...
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Best method of electroplating copper onto brass

I need to electroplate a layer of copper onto an irregular brass object (its like a cube). The wikipedia page on copper electroplating states that in order to get a smooth plating I need to add ...
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1answer
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Using the mole ratio to figure out the molecular formula [closed]

It takes $\pu{8.0 cm^3}$ of aqueous sodium phosphate to fully react with $\pu{12.0 cm^3}$ of an aqueous solution of the nitrate of metal $\ce{T}$. If both solutions have a concentration of $\pu{1 mol ...

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