The branch of chemistry concerned with the properties and behaviour of inorganic compounds.

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Why does Bismuth only create a +3 ion instead of a +5 ion?

It has 5 valence electrons, but only loses 3 of them to make a +3 ion. Why does this occur? I believe it may have something to do with how losing 3 electrons leaves you with the p sublevel full, but ...
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40 views

Formula for hypo

Can someone please tell me the chemical formula for just "Hypo"? This question came up in previous exams and I don't know what is the general /chemical formula for just "Hypo". I can find the formula ...
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16 views

Spectrochemical Series - Sigma Donor Capability

I fully understand and recognise the manner and which the series works. I cannot find any references for the change in sigma donor capability moving up the series. For example, comparing Cl- and ...
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23 views

Crystal Field Theory diagram

I need to draw a simple crystal field splitting diagram and identify the lowest-energy spin-allowed ligand field band in the electronic absorption spectrum for [MnCl6]2-. I know the basics of the ...
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26 views

Vycor + hydrogen at 750°C - reduction?

Does anybody have experience with Vycor 96% silica tubing in hydrogen at bright red heat, around 750°C, regarding its reduction to silicon monoxide or elemental silicon?
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48 views

How to dissolve steel without affecting aluminium alloy

Disclaimer: I have very limited knowledge of chemistry My problem is the following: I have motorcycle part made from some sort of Aluminium alloy - most probably 6005, 6061-T6 or 7005. And inside of ...
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57 views

Carbon dioxide in lime ground

Is storing carbon dioxide in limestone a good idea? Wouldn't that lead to a reaction like $\mathrm{C}\mathrm{O}_2 + \mathrm{H}_2\mathrm{O}\to {\mathrm{C}\mathrm{O}_3}^{-2} + 2\mathrm{H}^+$ And then ...
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60 views

Why don't molecules of ionic compounds exist?

My book says: "As single ions of a metal are not associated in the solid with single ions of a non metal, separate units of ionic compounds do not exist. It is, therefore, wrong to talk of a ...
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48 views

Which salt precipitates from a solution of ammonium oxalate and silver nitrate?

I am supposed to write the precipitation reaction for $\ce{(NH4)2C2O4 + AgNO3 ->[\ce{H2O}]}$ Is my equation correct? I left out the Spector ions. $$\ce{4(NH4) + 2 C2 +O4\rightarrow 4(NH4)2CO3}$$
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40 views

Double Displacement Reactions that produce gas [closed]

What type of double displacement reactions can form a gas. How can i determine if a double displacement reaction will form a gas?
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41 views

Chemical Formulas of Acids and Bases [duplicate]

How can we identify bases and acids by their chemical formulas? Take for example this reaction. I know that HNO3 is an acid and KOH is a base, but if I didn't know that how would I be able to ...
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77 views

Why are we not supposed to heat Erlenmyer flasks?

Chemistry says that we are are we supposed to heat boiling flasks, and not Erlenmeyer flasks. However, I can't find any information about this on Google. Is there a particular reason for this? Is ...
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280 views

Boiling point of a liquid increasing with temperature?

In my textbook, a statement is given, as follows: Boiling point of a liquid increases with increase in temperature However, I was wondering, isn't this wrong? The boiling point of a liquid ...
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2answers
64 views

Which branches of chemistry and in what order to learn (self study)?

Hi I have decided to give chemistry another shot (it didn't take so well way back in high school). My main interest is for reading up on brain chemistry and pharmacology. I currently have a textbook ...
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0answers
39 views

Hybridization of Fe in FeBr3 [closed]

What is the Hybridization of Fe atom in FeBr3? Please explain in detail not just using formula.
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27 views

Correlation Diagram Doesn't Match Selection Rules?

From Miessler's Inorganic Chemistry, 5th edition, there is this correlation diagram for $d^{2}$ in a octahedral field. On the left hand side, if it's not clear, it goes (from lowest to highest): ...
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1answer
22 views

qualitative permanganate test on sodium peroxoborate [closed]

what is the balanced equation between sodium peroxoborate, potassium permanganate and sulfuric acid in the qualitative permanganate test done on sodium peroxoborate. why is this test done?
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42 views

Testing a sodium aluminate solution

I prepared some sodium aluminate by reacting a strong $NaOH$ solution with aluminium foil and filtering the result. I now have a clear solution and I'm not sure what it is. I stopped adding aluminium ...
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3answers
93 views

Role of heat in combustion

What role does heat play in the combustion process.Specifically, does the amount of heat determine whether complete or incomplete combustion occurs, and is the amount of heat impacted by the amount ...
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1answer
43 views

Why Gold and Silver react minimally with atmosphere?

Gold and Silver atoms interact with one another to form reasonably strong metallic bonds, but surprisingly they have almost no chemical interaction with atmosphere. How can we explain it based on the ...
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1answer
30 views

Molar Volume Problem [closed]

Use the molar volume of a gas at STP to determine the volume in L occupied by 33.6g of neon at STP. Can someone explain to me how to solve this?
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1answer
67 views

How do I perform a gravimetric analysis of Portland cement?

To determine the silica ($\ce{SiO2}$) content in Portland cement by gravimetric analysis it is digested in $\ce{HCl}$ and the silica residue is eventually measured. The chief constituents are ...
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2answers
27 views

How easy it is for MoS2 to become oxidized

I made I high pressurized $\ce{MoS2}$ pellet, using a 6 ton pressurizer. I used very thin powder to create the pellet. I am using this pellet on beam, with some nuclear techniques. In my spectra I ...
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1answer
48 views

KOCN + C + heat =?

What are the products of the reaction KOCN + C + heat. I'm guessing some of the nitrogen is lost and forms something. I'm trying to find out the full equation, but a google search brings up nothing ...
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36 views

What is the range of sizes for molecular systems?

Molecular systems - are in a simple count systems made up of molecules. But almost every system, surrounding us are molecular than. Considering the molecular systems in terms of chemistry compels us, ...
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288 views

The Crisscross method for finding the chemical formula

I am reading this wikipedia article that I don't understand. What I don't understand is: suppose we have two elements $X$ and $Y$ having oxidation numbers $x$ and $y$ respectively. Can we prove ...
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1answer
50 views

Reaction between ammonia and iron

I am not a Chemist or did not learn chemistry as a student. I have faced this phenomena from a natural visualization. So this question. Experiment: What will be happen if we add a solution of ammonia ...
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1answer
29 views

How to speed up flash powder flaming reaction

Do you have an idea how can be flaming of flash powder (probably $\ce{KClO_4} $ (60%) + $\ce{Al}$ (40%) ) can be speeded up? Of course we consider the pure oxygen-in-air conditions. So how? With some ...
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40 views

How many lumens from 1 gram of flash powder

Does somebody know how many lumens we get from lighting 1 gram of flash powder in pure oxygen (or normal) environment? I'm thinking about $\ce{KClO_4} $ (60%) + $\ce{Al}$ (40%) flash powder and quite ...
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1answer
49 views

How do we calculate N factor and why is it useful in calulations?

I don't understand the concept of N factor at all. Why is it important? I know that it is something dependent upon the oxidation number, for example N factor of Na would be 1 since it has oxidation ...
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1answer
41 views

Compare Catalysts in Calorimetry Reaction

I am writing a lab report and need some help understanding something. I have performed a calorimeter experiment and compared the different reactions that were taking place inside it with a ...
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1answer
37 views

How would one compare the magnitude of covalent character between SnCl4 and SnF2 using Fajan's Rules?

It is easy to compare two ionic compounds when one of the ions is same. However, how do we compare two compounds if one of the ions is the same element but just has different charge and the other ion ...
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2answers
43 views

How to treat Magnesium powder and ribbon

I am a master student of nuclear physics. Due to some measurements I'd like to make, I have to use Magnesium as a beam target. Searching through the net to see it's properties I found that it can be ...
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2answers
56 views

Problems with precipitation of transition metal solution

I am trying to make a solution of "trace elements"--primarily transition metals-- for use in biological media; bacteria require elements like Cobalt, Molybdenum, iron, etc. in trace amounts. I am not ...
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87 views

Conversion of potassium dichromate solution to a less toxic solution

I have a solution of potassium dichromate ($\ce{K2Cr2O7}$) and I want to convert it to a less toxic solution. What would be the best way to do this? I was thinking of using the dissolved potassium ...
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3answers
82 views

Can oxygen burn in hydrogen

Most combustion happens involves the fuels burning in an oxidant. But there seems to be no reason that it cannot happen in the opposite way. Are there any experiments on oxygen burning in hydrogen? Or ...
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1answer
436 views

Why is fluorine the most electronegative atom?

It seems related to the atomic size but hydrogen has a smaller atomic size than fluorine. Why is fluorine the most electronegative atom?
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3answers
68 views

Why can potassium hydroxide not be used to remove atmospheric carbon dioxide?

As we know that $\ce{KOH}$ absorbs $\ce{CO2}$, then why can't it be used to remove the excessive $\ce{CO_2}$ present in the atmosphere?
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46 views

Make tin nitrate?

How can tin nitrate be synthesized? Mixing nitric acid and tin makes tin oxide (I did this in chemistry class) so how can tin nitrate be created?
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1answer
57 views

What chemical reaction can cause this blue-ish deposit?

Recently I noticed that some of our glasses and cutlery had developed a blue-ish deposit as you can see for the two sets of spoons below. For each set the spoon on the left has the blue-ish deposit ...
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1answer
428 views

Why does nitric acid not turn yellow everytime?

I have dilutions of different samples, which are made with 0.1 M $\ce{HNO3}$. Only I left them on the lab table for a few days and one turned yellow. So my question is why would one turn yellow and ...
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4answers
130 views

How could I create a machine that as rapidly as possible creates greenhouse gases from air?

For a very large-scale project, I am trying to create a greenhouse gas demonstration device, which rapidly produces greenhouse gases from atmospheric air using only electricity, or any chemical ...
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2answers
57 views

what are reduction oxidation reactions?

in the picture, the product is a neutral material, but in the illustration of the molecular structure, the compound is shown in its ions, why we can't show it in its ions even in the equation or if ...
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1answer
39 views

How do I work out the amount of H+ ions in a sodium hydroxide and water solution?

I know the $pH$, pressure, temperature and concentration of the solution. Is there a method I can use to work out the amount of $\ce{H+}$ ions?
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2answers
46 views

Is it possible to create a salt with multiple anions with only one cation(e.g. CaBrCl)?

I know that usually more electronegative anions would displace less electronegative anions but is there a way to get different anions to "share" a cation?
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50 views

Activity coefficient greater than 1

From Practical skills in Biology by Allan Jones et al. At high concentrations of certain ionic solutes, $\gamma$ (activity coefficient) may increase to become greater than unity. My questions ...
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2answers
88 views

How can I safely carry out an electrolytic etch on stainless steel without producing relatively harmful by-products?

I propose to carry out an electrolytic etch on a stainless steel plate like so: One of electrodes must be the stainless steel plate which is being etched and the surface layer must be removed. I'm ...
3
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1answer
66 views

existence and stability of Bifluoride ion

Consider the following homework question:- Statement 1. The $\ce{HF2^-}$ ions exist in solid state and also in liquid state but not in aqueous state. Statement 2. The magnitude of ...
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1answer
51 views

Solution containing Iodine

The question is:- Iodine dissolves in a variety of solvents forming solutions that are purple, brown or any intermediate shade. This property is due to:- Hydrolysis of iodine ...
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59 views

What is the nature of the oxide of boron?

I think it should be acid, as I am aware that a compound by the name of Boric acid exists. But how can the oxide be acidic when it is electropositive? Also, other members of its group are well known ...