Inorganic Chemistry

So in this picture, the temperature gap between a yellow flame and a blue flame is significantly large. Why is that?

When I was in science, my teacher was talking about the periodic table and atoms me and a fellow student wondered, what IS the empty space inside an atom (between the nucleus and the electrons)? Is it possible that there is nothing in that space, or could this question lead to particles smaller than quarks? Maybe it's dark matter. I'm not sure. Does anyone have theories or possible add-ons for this question? It's weird that there could be smaller particles than quarks, or that it is possible for some things to be made of nothing, maybe this could prove dark matter's existence!

Hi. Hi. According to the attached MSDS of a specific silicone grease (I deleted,on purpose,The brand name of it), Is it safe to use this silicone grease on o-rings,while it is in contact with potable water? This specific silicone grease is used,among other things,for lubricate diving equipments(o-rings,zippers etc.). According to the MSDS it contains:Polydimethylsiloxane: 90% (CAS:63148-62-9) Silica: 10% (CAS:7631-86-9). Those materials are,as i read,are considered to be safe in contact with potable water. The MSDS says that the silicone is physiologically compatible and it neither mutagenic, cancerogenic nor teratogenic. A tox…

How does a patina combination of copper sulphate and ammonium chloride solution react to copper I’ve a mokume gane ring of silver, rose gold and copper. To intensify the colour of copper I’ve been recommended to periodically wipe the ring with the above patina solution am keen to understand the impact of this on the copper over tome thanks

recently I have been studying methods of separation in chemistry in school. When I browse up some past papers it involves some hard double displacement reactions I am not aware of and the state it results in. I have searched the internet for identifying products of double displacement reaction but I have not gotten any useful information. Please give me an easy method to find the state matter of a compound by looking at its chemical formula (I mostly need it for ionic compounds). Also, it helped me find the products of double displacement reactions.

Hello, I am back after a while. I will no longer post crap. Anyways, back to the question. Is there a way I can turn magnesium powder into magnesium paste without chemically changing it? Thank you

Instead of CuSO4 if we use Sulphur in H2C2O4 the reaction as follows, H2C2O4 + S = H2SO4 + CO2 + H2S(😶‍🌫️) or it can follow H2C2O4 + S = SO2 + CO2 +H2O (sealed reaction) so that Sulphir dioxide can react with the water 🤔 . Just hate CuC2O4 precipitation too much effort. 🤕

Yes, I know about the danger of a thermal runaway with ammonium nitrate, and I was heating only .5g of the stuff. OK, I was heating some ammonium nitrate in a test tube over a Bunsen burner, and it was decomposing pretty vigorously, until all of the sudden, I heard a pop, and then a bunch of crackling inside of the test tube. When it popped, there was a flash of yellow light. What happened? This reaction looked remarkably like what happened when somebody on Youtube dropped a gummy bear into molten potassium perchlorate, but there was nothing else in the test tube to react with my ammonium nitrate. The only explanation I can possibly think of is that a spider fell into…

Good day, Thanks for taking my question. I want to make a contact lens case out of fine silver (.999) and while silver is inert, I am concerned about a potential hazard of tarnish, after it inevitably forms, dissolving into the saline and causing 'severe eye irritation,' as the SDS for silver sulfide warns. Will saline solution cause any silver tarnish to dissolve? If dissolved, there is potential for causing eye irritation. I am unsure of the chemistry between silver sulfide and saline. Your help would be greatly appreciated. Thanks! mhawk

I have a question about the value obtained by Rate Law. For example, in this case: the value of rate obtained by this equation is the global rate of reaction, right, and not the rate of a specific specie, I know that using this global rate I can find the species rate, multiplying for his stoichiometric numbers. Is my assumption correct? Because if the answer is YES, this question no make sense for me. I was trying to solve this question: I created this graph (Title is in Portuguese): I used "1/[HI] x t," which indicates a second-order reaction with a rate law equal V = k[HI]^2, so, the slope of the graph is numeric equal for k, A…

Hello Everyone, Im interested in creating a similar product to RMR 86, please see the SDS below. I was hoping someone can figure out which powder ingredients I need and how many grams to mix with water ? It contains "UltraPure Sodium Hypochlorite". https://cdn.shopify.com/s/files/1/0745/8297/files/RMR-PRO.pdf?v=1671552733 Documents mention... Hybrid Ultrapure Sodium Hypochlorite 5-10% Sodium Carbonate 1-3% Sodium Hydroxide 1% Sodium Silicate ? Lauramine Oxide ? Bottle mentions... Sodium Hypochlorite 8% Surfactant Mixture 8% Inert Ingrediants 10% Other Ingrediants 75 % Water Thanks, Daniel

Getting shot of huge amounts of CO2 requires proportionately huge quantities of sequestrant. One sequestrant that could fit the bill is Fe2O3 (haematite) that comprises the much of the extensive banded iron formations which are globally distributed. My thoughts on this drifted to the following schemata which needs input from a proper chemist to evaluate. Fe2O3 + 6HI(aq) > 2FeI2 + 3H2O + I2 Note Fe3+ reduced to Fe2+ 4NaOH(aq) + 2CO2 > 2Na2CO3 + 2H2O Stripping process from rich CO2 stream 2FeI2 + 2Na2CO3 > 2FeCO3 + 4NaI Precipitation of siderite (desired pro…

Hi I understand that in the electrolysis of water, there are these half equations 1. Cathode (reduction): 2 H2O(l) + 2e− → H2(g) + 2 OH−(aq) E=-0.83 2. Anode (oxidation) 2 H2O(l) → O2(g) + 4 H+(aq) + 4e− E=1.23 3. Cathode(reduction) 2H+(aq) + 2e− → H2(g) E=0 4. Anode(oxidation) 4 OH- (aq) → O2(g) + 2H2O(l) + 4e- E=0.4 And from what I understand, all four occur. But two will be the main ones that occur. In Neutral conditions, we'd get (1,2) as the main ones In Acidic conditions we'd get (3,2) as the main ones In Basic conditions we'd get (1,4) as the main ones. And from what I understand, the E values there are SEP - stand…

Greetings. If deserves moving to science news, well, go ahead. Seems rosy. Perhaps too rosy. Any opinions for the inconvenient sides if any; of hurdles against ? Aimed mostly to large scale storage (which is not wrong at all) , at least for now. I understand the manufacturing/production started already. 🤨 A link, just a link ---> https://www.youtube.com/watch?v=cHNELRnJ_4Y There should be others, better or worse.

I started learning chemistry in school and am very interested in it. I just have some questions. 1. Is making elements chemistry, I am pretty sure it is but I just wanna double check. 2.What materials and tools do I need to make basic elements. 3.What precautions do I need to do before doing chemistry with elements. The first element I want to make is hydrogen I think that would be called protium correct me though because I really don't know. Thank you for helping!

As a hobbyist, I am developing a technique to grow perfect, large and completely translucent crystals of CuSo4 5H2O . I have noticed that as my mother solution becomes depleted there is a green layer at the bottom of the otherwise blue solution. I'm curious as to what this could be. Does anyone have any ideas just offhand? The solvent is filtered and distilled water. The CuSO4 has been washed, dissolved, filtered and recrystallized twice before use in the mother liquid. Growing temperature is 4 c. The green layer is always at the bottom and becomes noticeable after about a month and is unmistakably visible after two months.

I am guessing this is in the right place, This was on the local news today Canadian firm hopes to dump minerals in sea off coast of Cornwall in climate change experiment https://www.itv.com/news/westcountry/2023-03-02/firm-hopes-to-dump-minerals-off-cornish-coast-in-climate-change-experiment Is there any actual scientific basis behind dumping MgOH in to the sea, to reduce acidity, ? Another question is if this is so good, why not do this off the Canadian coastline. ? Just seems dodgy to me. This does seem related to an experiment I am trying to do which is to determine the pH of seawater (done) next step is to figure out if eggshell…

Variations in temperature, pressure, relative humidity will act directly on the silica gel which is saturated pink and condense and spill liquid outside the silica gel??

This is sort of related to my post on Red Cabbage indicator in the Amateur Science section. https://www.scienceforums.net/topic/131382-red-cabbage-indicator/ So in terms of experiments that cause a change in pH should this be referred to as increasing and decreasing pH of a solution / substance. For example if I take Vinegar which is Acidic (so pH will be between i think 6 and 1, and add Sodium Hydrogen Carbonate, which is an Alkali (pH 8 to 14). then the acid either neutralised or becomes more alkali, so the pH has increased. pH 7 being neutral of course. I am trying to write up an experiment or an idea I have had at least, and want to make sur…

Silica gel in spheres supports up to what temperature without damaging or losing its total chemical structure of Adsorption? What maximum temperature of microwave oven at maximum power that causes this type of damage to the spheres in 3 to 5 minutes?

Hello, I have a question about an exercise of an MIT online course: "For two bonded atoms X and Y, a small eX and large eY will result in a bond energy (Ea-b) with a large __________ contribution." Where e = electronegativity I have tried "electronegativty", "polarity", "strength" and "bond strength", but none of them are correct. Could someone give me an idea? Thanks a lot.

A long time ago, I had a book on winemaking that delved into the chemistry more than most. It said, iirc correctly, that titrating wine was a more accurate/predictable measure of how acidic the wine would taste than measuring pH. In those 80's days it was litmus paper tests or titrating. Titrating red wine was difficult to see the indicator result. Fast forward to now, I'm thinking of winemaking again and would like to use an electronic pH meter I have. Does anybody understand the difference the author was talking about. The authors were chemists themselves.

Does anyone know of a chemical indicator that changes color when water is introduced

from a paper: "While the redox properties of iron bound to Ins(1,2,3)P3 have not been studied, we observed in our potentiometric runs that Fe2+ in the presence of Ins(1,2,3)P3 and at pH 7 or above underwent ready oxidation (in an inert atmosphere) to Fe3+." of course i can guess/infer from the context what it means but where is the term "ready" in chemistry defined officially?

Hello I've been reading a bit on the internet about the use of chrome for various applications such as item plating, vehicles, tools, leather work and even how its used in supplements. But I need some further help regarding chromium (specfically toxic hexavalent chrome) interaction for end-user/consumer side. It seems chromium is safe when its Cr3 (trivalent) and is even beneficial for humans, but it seems Cr6 hexavalent chromium is the complete opposite and is even labeled as a carcinogen. Upon doing some rough research on how Cr6 finds its way to the consumer side and the impact, I've encountered the following details: Stainle…