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 can I separate sodium ions from brine or molten NaCl?

Is possible to separate sodium ions from an aqueous solution of NaCl? If so, how do I go about it?
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Does the reaction of sulfur and potassium nitrate involve production of sulfur trioxide?

I've heard that oxidising sulfur with potassium nitrate yields $\ce{SO3}$ gas, but can't find a definitive answer anywhere. Is sulfur trioxide produced? More generally, what's the full reaction?
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Reactivity of alkaline earth metals towards water

In general, it seems to be a trend regarding the reactivity of alkaline metals with water which says that as you go down the group, they become more reactive towards water. But I'm curious about which ...
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Is this a homogenous reaction?

$$\ce{HCl(aq) + NaOH(aq) -> NaCl(aq) + H2O(l)}$$ Would this reaction be considered homogenous even though there is a liquid in the products?
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Redox reactions of halides in hexane

When we have two test tubes and we add: In the first test tube: hexane, aqueous solution of $\ce{NaCl}$ and aqueous solution of $\ce{I2}$ In the second test tube: hexane, aqueous solution of $\ce{...
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Solid aluminum powder

I am curious if there is a way to dissolve or break down solidified aluminum powder. I have tried to break it apart but it is a solid chunk and I need to figure out how I can break it down to 150 ...
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What is the role of size in formation of complex compounds?

In my textbook, these reasons are given as of why transition metals form a large number of complex compounds:- Smaller size of metal ions High ionic charges Availability of d orbitals for bond ...
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Ionisation energy of Nickel

Look for the following data for Nickel IE1+IE2 2490 kj/mol IE3+IE4. 8800kj/mol Total. 11290kj/mol Hence Nickel can show +2 oxidation state but not +4. But according to me Ni in +4 oxidation ...
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Effect of increasing nitrogen concentration in the synthesis of ammonia

For the reversible reaction $\ce{N2 + 3H2 <--> 2NH3}$ When $\ce{N2}$ is increased, the the forward reaction is favored, increasing the yield of $\ce{NH3}$ and decreasing the yield of $\ce{H2}$....
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How to test for Chromium(III) Oxide

I got some chromium(III) oxide ($\ce{Cr2O3}$) sold as pigment, called "Chrome Green". I've been having a hard time trying to react it with $\ce{HCl}$ to make $\ce{CrCl3}$. I thought it was just hard ...
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Why Li can't make it's Peroxide when heated with more O2?

Every first group metal reacts with $\ce{O2}$ and makes there monoxide at room temperature. But it says that $\ce{Li}$ does not make peroxide when heated with more $\ce{O2}$. But other metals in ...
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What is the relationship between the values of n and ml? [closed]

Example question: ml=+5 what is the lowest value of n? I can't seem to remember the easy trick to finding the relationship if someone could explain that would be great. -Thank you in advance.
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If propane with specific parameters were to combust in open air, what is actual volume of CO2 produced

Lets say we have a sample of propane gas having a volume of 2.70 L at standard room temperature and 1.75 atm. This gas is exposed to our air. The equation that governs this reaction is: $mC_3H_8 + ...
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Why isn't HCl called hydrogen monochloride? [duplicate]

Since HCl is a covalent compound, then it would be expected to be called hydrogen ***mono***chloride following the rules for naming. Instead it is named as if it were an ionic compound, without any ...
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Why is KOH less soluble than NaOH in alcohols?

Alkali metal hydroxides solubility in water increases down the group. Because the mechanism of dissolution is the same in alcohols, why the anomaly?
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Thermal stability of interhalogen compounds

I am striving over the question that what would be the stability order of the following interhalogen compounds : $\ce{ClF3, BrF3}$ and $\ce{IF3}$. One probable answer I got is that stability of ...
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Why is the formation of slacked lime accompanied by a hissing sound and the formation of bubbles?

My teacher made me write that that the formation of calcium hydroxide (slacked lime) from calcium oxide (qucklime) is described as $\ce{CaO + H2O -> Ca(OH)2}$ and that the process forms ...
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Would magnesium and calcium hydroxide undergo a single replacement reaction?

Can calcium hydroxide react with magnesium (if given sufficient activation energy) to produce magnesium hydroxide and calcium, in the same way that NaOH + $\ce{Mg} \ce{->} \ce{Mg(OH)2} + \ce{Na}$ ? ...
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Coordination dilemma, change of energy related to ligand distance

In octahedral field, the baricenter remains conserved and there is lowering of energy of $\mathrm{t_{2g}}$ orbitals. What is a baricenter and why must it be conserved? Why is there lowering of energy ...
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247 views

Calculate the mass of Mg needed to produce 5 kg of vanadium

I need to calculate the mass of magnesium needed to produce $\pu{5 kg}$ of vanadium from the following reaction: $$\ce{3Mg + 2VCl3 -> 2V + 3MgCl2}$$ given relative atomic masses for $\ce{Mg}$ and ...
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938 views

Which are more reactive lanthanides or aluminium? [closed]

I am not sure whether to consider the standard reduction potential or ionisation enthalpy.Which would be more reactive out of the lanthanides and aluminium
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Do you get a new chemical compound if you mix sodium hydroxide and water?

Me and dad started fighting over this a couple of days ago and wagered on this. He said mixing these two gives a chemical compound, I said that it doesn't.
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Separation of sulfur dioxide and sulfur trioxide in the contact process

When gases leave the catalytic reactor in the contact process of sulfuric acid generation, both $\ce{SO2}$ and $\ce{SO3}$ will be present. According to descriptions I have read, the trioxide reacts ...
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can I mix. trisodium phosphate, potassium hydroxide, and sodium hydroxide together? [closed]

Can I mix trisodium phosphate (tsp), potassium hydroxide, and sodium hydroxide ( or sodium hypochlorite ) and not cause a bad reaction? And will this make for a good degreaser and cleaning chemical ...
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Alkali metal hydrides

I know that stability of alkali metal hydrides decreases down the group,Hence the lowest member in the group easily breaks into its cation but does this easiness of breaking into cation has any ...
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Classification of oxides,transition elements

I understand what basic,acidic and amphoteric oxides are. But how do we classify oxides on the basis of metallic nature?Explain how we can deduce if the oxide is metallic or not. For example,what ...
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How does a group 15 oxide react with water?

Given the following reactants: $\ce{P2O5}$ and $\ce{H2O}$ How does one determine what product the two will form in a reaction? I instantly tried to treat the problem as a double displacement ...
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962 views

Zinc oxide reduction in ethanol

I'm trying to prepare a ZnO thin film deposited on a glass substrate. The precursor solution prepared by sol gel process through dissolving 1 M zinc acetate dihydrate $\ce{Zn(CH_3COO)_2.2H_2O}$ in ...
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Perovskite reaction equation (KMnF3)

For the synthesis of $\ce{KMnF3}$ I said the reaction equation was $\ce{3KF + MnCl2 -> KMnF3 + 2KCl}$ Is it this simple or are am I missing something with these particular types of reactions?
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what is the mass of chromium in this sample?

If the total number of atoms in a sample of potassium dichromate is $2.13\cdot10^{24}$ , then the amount of chromium in this sample is? the answer that I've come up with is $367.64\ \mathrm g$ but in ...
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How do I figure out the amount of water (mL) and amount of Aluminum (g)?

We have a project where we have to extract copper from copper sulfate. But my group is given a powder version ($5~\mathrm{g}$), so we have to first dilute it with water and then combine it with ...
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Looking for information about possible ingredients of a fertilizer

I have found it in a local store, "20.20.0 - Kompoze" is written on the pack. In the pack, there are yellowish greenish irregular formed little balls. What is this, do you know ? Please help and ...
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How to differentiate the notation of a compounds charge and an anions oxidations state?

I have had the case a few times. Being given something of this form: $$\ce{Cr2O7^2-}$$ How do I know whether the $2-$ is referring to the oxidation of the oxygen anion or the charge of the whole ...
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Peroxide and 2 extra electrons?

Trying to figure out where peroxide gains 2 electrons and why it has a 2- charge? On the Lewis dot structure it shows each O has 6 electrons and that it has a single bond between the two Oxygen atoms. ...
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How to calculate the yield for an incomplete reaction?

I had a doubt in part b) of the following question. a) When 0.527 g of platinum is heated in fluorine, 0.732 g of a dark red volatile solid forms. What is the empirical formula of this product? b) ...
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Compounds forming between silicon gallium and nitrogen [closed]

What are the possible compounds that can form between silicon, gallium and nitrogen?
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Rusting without water? [closed]

I was under the assumption that corrosion (rust specifically) required water + oxygen to occur. But the word equation below states that only oxygen is necessary. I know this is true but I do not know ...
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Why Atomic size decreases left to right in a period in MPT? [duplicate]

In modern periodic table, atomic size decreases as we move from left to right in a period. As no. of electron increase left to right but why atomic size decreases?
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Why we make pyrogallol alkaline to absorb oxygen? [closed]

Pyrogallol is activated by -OH groups but what is the use of making it alkaline?
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Is there air in the volume of crystallized sodium hydroxide?

I have a container of crystallized NaOH (98%) which has a volume of 500ml. Now, as per wikipedia, Sodium Hydroxide's density is 2.13g/cm3. This should give the weight of a 500ml container of NaOH at ...
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Do Acids/Bases undergo dilution/bio-degradation when exposed to air?

I spilled some cleaning fluid/drain opener in my trash can, a long time ago(almost 3 months ago), I didn't tried to clean it up. The cleaning fluid was diluted, and I spilled a small amount not more ...
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Titration of magnesium sulfate with potassium permangante

One common method for measuring the amount of $\ce{Fe^2+}$ in $\ce{FeSO4}$ is by dissolving it with $\ce{H2SO4}$ and then titrating with $\ce{KMnO4}$. However, is it possible to measure the amount of ...
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Acidic strength of oxides of nitrogen

Why do we compare acidic strength of oxides of nitrogen even though they don't have hydrogen?
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Why would this reaction occur? Won't it be unfavourable? [duplicate]

I was just reading about how Nitrogen and Oxygen combine to form Nitric oxide. My question is, why would this reaction even occur? Isn't the valency of Nitrogen 3- and Oxygen 2-, and therefore this ...
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Using stoichiometry to split a complex mineral

Here is the problem I am stuck with, in particular just the first part of it. I have calculated the moles $4.492 * 10^{-3} \,\mathrm{mol}$ and I am quizzed with regards to the equation that occurs. ...
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307 views

In ionic solids such as NaCl, do the cations fill interstital holes in the cation's cubic close pack structure? [duplicate]

Are binary ionic solids like $\ce{NaCl}$ comprised of a cubic close packed structure of the anions with the cations filling interstital holes or do the cations and the anions contribute to the cubic ...
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How do I know with which oxidation numbers I can form a certain kind of compound?

Take, for istance, phosphorus; it has eight different oxidation numbers, but it can only form two different anhydrides, phosphoric (when the oxidation number is 5) and phosphorous (when it is 3). How ...
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Second electron affinity of sulfur and oxygen

Why is the second electron affinity of oxygen greater than that of sulfur? I think it should be like- second electron gain enthalpy of oxygen should be greater than the sulfur but electron affinity ...
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Thermochemistry problems?

Question 1: A compound A reacts according to the following hypothetical equation and has a molecular weight of 48.36 g/mol. 3 A (s) +B (aq) ––> 2 C (aq) ∆H° = ? A sample of A, weighing 0.152 g ...
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How can I balance the redox reaction of sulfur dioxide with oxygen?

How do I balance this reaction using half-redox equations? $$\ce{2SO2 + O2->2SO3}$$ My work is: Oxidation: $\ce{SO2 + H2O -> SO3 + 2e- + 2H+}$ Reduction: $\ce{H2O + 2e- + O2 -> SO3 + 2H+}$...

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