Questions tagged [applied-chemistry]

Chemical processes and theories being used in practical and experimental applications.

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10
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2answers
209 views

Research-backed articles on cast iron seasoning

I've always seasoned my cast iron pans with vegetable oil because that was what I was taught. I'd done some research before, and even came across this StackExchange post on asking the best oil for the ...
1
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1answer
34 views

Purging submersible with nitrogen

I do a lot of short term ocean field deployments where system electronics are self contained in a submersible enclosure. A new project I'm working on requires a long term deployment in the deep ocean. ...
2
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0answers
40 views

Is mixing silicone oil with other types of oil safe?

I'm looking to lubricate some nylon gears in a servo motor, and online sources tell me silicone lubricants are one of the best ways to go. However, when I opened up the servo, I found that it already ...
1
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0answers
37 views

Steel Wire Rusting & Glowing Orange

In my backyard I have a DIY wire trellis made in part by wrapping a steel wire around a water wellhead. I noticed out the window in the dark a tiny pinprick of orange / yellow light coming from the ...
2
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1answer
268 views

Why was rhenium used as an igniter in flash bulbs?

It looks like it typically had a current passed though it to ignite zirconium threads. What properties of rhenium made it the best metal to use for this?
-1
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1answer
21 views

Significance of enthalpy of hydration of salts [closed]

I've been researching for weeks but can't find anything on a real life process of hydration, as my experiment is determining the relationship between the enthalpy of hydration and different types of ...
4
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0answers
42 views

Carbohydrate Chemistry for Candy Making

I am trying to understand the different behaviors of sugar syrups when it comes to candy making. Specifically, maple syrup vs molasses. In making maple candy, pure maple syrup is heated to soft ball ...
2
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1answer
481 views

How do I create a transparent liquid for ferrofluid display?

Hello~ I am a media art artists working in Korea. Recently, create a kinetic artwork using ferrofluid. I need to create an artificial pond with a diameter of 3 meters. So I need a lot of suspension ...
1
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2answers
74 views

Artificial nose sensors

I'm am doing research in creating an artificial nose. I need to know how this process works by someone with domain expertise; essentially, what technologies are available currently to detect a broader ...
-2
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1answer
70 views

What does 1:4 t-BuOH/H2O mean?

I've got a - probably rather not-so-smart question regarding chemical reactions. In many publications, the authors say that they used e.g. t-BuOH/H2O (1:4) as solvent. What exactly does 1:4 mean? Is ...
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4answers
4k views

What is CuCl · CO · 2 H₂O?

What is the chemical $\ce{CuCl.CO.2H2O},$ formed via the reaction of copper chloride and carbon monoxide? Does this compound have any use or appear in any noteworthy reaction?
2
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1answer
78 views

Is sodium percarbonate the safest and by weight the most efficient oxygen generator? [closed]

I have been reading about $\ce{Mn}$-catalyzed reaction of sodium percarbonate and water to produce gaseous oxygen in medical emergency situations. This seems safe due to its reagents and products, ...
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1answer
79 views

How to oxidize tantalum? [closed]

I am interested in learning how to oxidize tantalum. I have seen some tantalum rings that the sellers say is a permanent smokey blackish color. But I've spoken to some people that say tantalum cannot ...
12
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2answers
439 views

Can olivine be used to make glass?

This concerns ongoing work to find a plausible approach to large-scale production of clear glass on the Moon. It's for an ultra-hard science fiction project and I really want to get it right. Olivine ...
2
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1answer
58 views

Synthetic ruby - damaged by heat less than its melting point?

A bit of a jewellery question but chemistry related. I want to encase a synthetic ruby (corundum, Al2O3) in silver by melting the silver around it. Either in a furnace or by casting. The MP of silver ...
8
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1answer
204 views

Can glass be made with anorthite?

The lunar highlands are made mostly of anorthosite (90% anorthite, the rest oxides of magnesium, iron, a little titanium, and traces of others), and pretty pure anorthite ($\ce{CaAl2Si2O8}$) is common....
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0answers
59 views

Manufacturing coloured crystal glass using gold nanoparticles

I came across this video which shows how a crystal chandelier is made. I recommend that anyone reading this post should watch it; it is quite fascinating. Anyway, at about the 2:15 mark, the video ...
16
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4answers
14k views

How could I cause metal to rust rapidly?

I'm writing a novel set in the mid-nineteenth century. One of my characters needs to cause an iron padlock to rust rapidly, ideally within a matter of hours. The lock doesn't need to rust away ...
0
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1answer
166 views

What substance consumes oxygen from atmospheric air [closed]

I'd like to find an economical substance that will consume oxygen from a container. Steel wool comes to mind but I don't have an intuition how feasible it would be. The chamber is 5 gallons in size ...
7
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2answers
6k views

Selective etchant for Al2O3 (Does not etch Al, Cu, Zn, Sn)

I'm looking for a wet-etchant to remove aluminum oxide created by anodizing, but not etch the unoxidized metal (with greater than 10:1 selectivity) I know about chromium(IV) oxide and fluorine-based ...
4
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2answers
7k views

Could a lead-acid battery electrolyte be replaced by hydrochloric or nitric acid?

Hydrochloric acid, as well as nitric acid, are also strong acids like sulfuric acid. So, why are not they used commercially in lead-acid batteries?
4
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1answer
100 views

How may the water from rain be tested to determine it is natural, or from cloud seeding?

This article lists several mechanisms that may be used to control the weather and/or induce rainfall. Apparently many states, other than the one listed in the headline, have experimented with such ...
8
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3answers
249 views

Constructing a grenade (for a novel I'm writing.)

Ok, before any eyebrows get raised, this is for a novel that I'm writing and inspired by this answer from worldbuilding and this reference answer. I just want to make sure the device I'm trying to use ...
0
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0answers
96 views

distillation of aqueous CAN solution for the purpose of a reversible and strong endothermic reaction in cool packs

I know calcium ammonium nitrate (CAN) is used for cold packs. By bending a small metal plate the salt gets dissolved in water (separated pack) and this process is endothermic. I would like to heat ...
3
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1answer
144 views

Lubricants and rubber

I've been reading a lot of conflicting articles/threads pertaining to which lubricant is compatible with rubber/plastics and I'm stumped. From what I've come across, the consensus is that silicone ...
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0answers
1k views

What is the best invisible ink for clothing?

I am interested in writing and revealing a message in invisible ink for theatrical purposes. I found a list of potential compounds here but I am having a hard time prioritizing which to experiment/...
43
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1answer
6k views

Why can we still breathe in valleys? [duplicate]

Air is 1% argon. Argon is heavier than air. Why doesn't the argon concentrate in low-lying areas, choking out life there?
2
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2answers
111 views

Good Alternative for Plasticized PVC [closed]

In my current job we use gloveboxes, but unlike most we use disposable PVC bags on the entry ports instead of fixed gloves. The bags have an O ring which is stretched onto a spigot proud of the ...
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2answers
57 views

How to desalinate seawater at freezing temperature or high pressure?

The deep ocean depths have very high pressure and freezing temperatures. Could one or both of these characteristics be used to desalinate seawater? Reverse osmosis uses high pressure to separate salt ...
4
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1answer
494 views

Why is antimony oxide used as a flame retardant?

What is the mechanism of action of antimony oxide as a flame retardant? Is this to do with radical absorption?
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1answer
616 views

Determination of hardness of water using EDTA

Finding hardness of water by using EDTA. For determining permanent hardness we take the sample of about $\pu{50 mL}$ and then add Eriochrome Black T (EBT) indicator that results in wine red color due ...
1
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0answers
107 views

Why is paper sometimes yellow?

Where I'm from, most paper you find/get at stores has this yellowish tinge. Why is it yellow and not white? In my chemistry book it's mentioned that paper manufacturers "refine" paper from wood pulp, ...
2
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0answers
1k views

How to calculate resulting pH of mixing 2 fruit juices [closed]

I want to make jelly from a mixture of 50% fresh apple juice and 50% juice of another fruit. The resulting pH must be less than 4.6, otherwise the jelly will not be safe from C. botulinum. Based on ...
0
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2answers
137 views

Using quantiative analysis to find empirical and molecular formula

A compound of Ca, C, N and S was subjected to quantitative analysis and formula mass determination, and the following data were recorded. A $\pu{0.250 g}$ sample was mixed with $\ce{Na2CO3}$ to ...
6
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2answers
185 views

How can I make a better whiteboard cleaning solution?

I just started work as a lab assistant in a chem lab. The whiteboard the instructor uses for classes gets very dirty very quickly. The woman who started at the same time as I did spent over 3 hours ...
3
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1answer
362 views

How to determine fire hazard of heating ethylene glycol to dissolve borax and boric acid

I am looking to replicate instructions provided in the last paragrph of this article that requires dissolving borax (Sodium Tetraborate decahydrate ($\ce{Na2B4O7·10H2O}$)) and boric acid in ethylene ...
14
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1answer
897 views

Are there any significant uses of the compound formed by magnesium and anthracene?

In an unusual reaction, magnesium reacts with anthracene in THF to form a grignard-like compound called, prosaically, magnesium anthracene: I remember using it briefly in the 1980s. At the time there ...
3
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1answer
612 views

Does selenium sulfate corrode or otherwise react with metals?

I was just watching a cartoon called Motorcity, and they featured a real compound called selenium sulfate. While I'm sure that the compound blowing up a detached steel [car part] on contact is just ...
1
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1answer
111 views

How can I determine/quantify the presence of boron nitride on a metal surface?

We use micron-grade hexagonal boron nitride (hBN) to coat the surface of bullets that are jacketed in gilding metal. This coating is mechanically embedded/plated onto the surface in order to increase ...
4
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0answers
666 views

Is it possible to make Spider-Man like web fluid? [closed]

Is it possible to make a substance which has similar properties to that of the web fluid e.g. High tensile strength, sticky (can attach to most of the surfaces), evaporates within few hours etc. If so ...
2
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0answers
32 views

Bonding Carbon Fiber to Metal

I have an application for a very thin, strong, electrical conductor that need to act as a (almost) frictionless support "rope". Typically materials like tungsten wire or platinum-iridium alloys have ...
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0answers
33 views

Boron nitride polymerization with silicon based molecules

Since boron nitride is similar to carbon hexagonal structures and silicon is a main component of inorganic polymers. Is it possible to make it from a polymer under certain conditions, if so what ...
1
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1answer
3k views

Baking soda + oil solubility

I have a question regarding the solubility of baking soda (bicarb soda) in oil. I am pretty sure that it has poor solubility, but I have a chemistry dilemma and cannot seem to solve it. I make all-...
5
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0answers
133 views

Where is my antimony going?

I work in a trace metals laboratory operating an ICP-OES. I've been having some trouble with the recovery of antimony in a weak $\ce{HCl}$ solution post-digestion. The antimony is part of a mix of ...
3
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0answers
35 views

Coating applied to plastic (polymer suitable for straws) to repel carbon dioxide to prevent “floating”

We are four students currently finalizing our last exam-project before our bachelor. We confirmed our hypothesis that straws floating to the top of your drink is a "problem" from our survey. Our ...
1
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0answers
28 views

Calculating amount of alkali additions to get desired pH in (hard) cider

This is linked to my question over on the HomeBrew SE site: https://homebrew.stackexchange.com/questions/18837/reduce-acidity-of-hard-cider I haven't done chemistry since I was 17/18 but I remember ...
0
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1answer
239 views

What can be a harmless electrolytic additive for water for creating an oxy-hydrogen flame?

I was thinking of preparing a tiny oxy-hydrogen flame for soldering. I am going to use 6V DC and aluminum sheet as the electrode for this. Now, I have to add some electrolyte to water, that can be a ...
5
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2answers
209 views

How might ammonia be created in this mechanochemical reaction?

Can mechanical agitation catalyze reactions? It appears so (thanks to Mithoron for the pointer!). We observed the following: We were using 10-micron hBN powder to impact-plate copper bearings (e.g., ...
2
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2answers
2k views

experimentally determine oxidation state of Iron compound

I need to make several Iron compounds but I am having a bit of trouble finding a decent way to determine the oxidation state of Iron. I'm starting with a Iron(II) compound that I try to oxidize using ...
4
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0answers
73 views

ZnO spontaneous combustion during transport

I found your contact information researching $\ce{ZnO}$ reactions. I was hoping you could please help me or orient me in the right direction to find an answer to my problem. The company I work for ...