Chemistry

I'm considering electrolyzing water, using wood ash as the electrolyte. 1. Is there anything in wood ash that would react with the graphite rods mechanical pencils use? 2. As far as means that are cheap and easily available go, what would you recommend for how to store the hydrogen and oxygen?

How to make Rhodium Sulfate from Rhodium sponge

hello, so I want to know if this version still accurate since it was made in 1970? and can you tell me why. thank you

If there exist catalysts in nature which are capable to break down very strong Nitrogene bond (nitrogenasa, for example), why there is no (?) catalysts which are capable to break down metal oxides? For example, Aluminum oxide, Calcium oxide or similar? Could they exist in theory at least?

Anyone have idea about mono chloro benzene chemical structure?

I just wanted to get an opinion from a more informed group. Is 3% (over-the-counter) Hydrogen peroxide safe to swish around to help whiten teeth? I've heard from many sources that it is, others say it will destroy the enamel. Thanks, Kenneth Anderson

As a patriotic British citizen, I am accustomed to waking up and making a cup of tea every morning. I like to drink mine at around 50 degrees Celsius. As I pour my boiling water (100 degrees Celsius) from the kettle into my cup, I always ask the same question... 'Would it reach my optimum drinking temperature (50 degrees Celsius) faster if I pour the milk (2 degrees Celsius) into my cup right after pouring the water, or would it reach it faster if I leave the water until it has cooled a little from the ambient temperature and then add the milk?' I guess it is a question of whether an instant mix of cold liquid into a hot liquid will bring a temperature down quicke…

When more magnesium is added to the HCl, more heat is created. I know why more heat is created with the bonds breaking, but I don't know where the extra heat comes from. I assume the extra heat is coming from the surrounding air and the test tube but what is actually happening within the elements to actually be absorbing more heat?

For example, due to the increased uptake of free radicals throughout the body?

from link: http://www.ncbi.nlm.nih.gov/pubmed/18752822 some of the contents: catechol, orthoquinone, muconic acid derivatives of BPA, benzoquinone and 2-(4-hydroxyphenyl)-propan-2-ol. aliphatic acids or aldehydes, quote:The formation of these latter products would not be favored under water treatment conditions.\\ are all these chems unsafe to be in drink water, or just the last 2? do they say that (from quote) because of the wide range of contaminants in waste water? would ozone work to treat my tap/bottled water for bsa? thanks!

Which substance has melting point around +38-+43 Centigrades? A substance should be completely non toxic even if ingested. For example, something that could be used in a food industry. In its solid form (over +45C) it should be relatively hard, not too plastic.

No I'm not gonna poison anyone, I read all the warning stickies. Part of this thread is just personal interest, but some will be invariably used in my writing, as much of my research usually is. I could probably just Google most of these questions but I suck at internet. 1: How are toxins and hazardous substances usually categorized? Mode of action, similarities in chemical structure, etc? Do biological effects have a correlation with chemical similarities? 2: Which hazardous substances/classes thereof kill the fastest? Which kill faster than say....severe abdominal trauma? That's a bit vague....how about an arrow to the pancreas? 3: Which have the lowest medi…

HI ALL! Im trying to understand ionization energy, which as i understand is the amount of energy it takes to bump these electrons out of orbit, first i have problems measuring a gram of O2, so lets start simple with NaCl: Na = 500 KJ/mol = 5eV Cl = 1250 KJ/mol = 13eV so if i want to break down this compound I would go by the Na value rite? since it is the first in the compound? 1 mol of Na requires 500KJ so thats what i need to dump in to my pot, but how? according to this: http://www.rapidtables.com/calc/electric/Joule_to_Watt_Calculator.htm If i am to dump 500KJ to get my mol of na i will need to insert electric power at 1.6KWatt for 5 minutes? or 800watts for 10 min…

So I went from enzyme to catalysis which consists mostly of inorganic substances. Now in a particular catalysis case of manganese dioxide and hydrogen peroxide reaction. How does the manganese dioxide breaks down hydrogen peroxide? Does its shape changes like the enzyme does to break down the substrate?

Trying to find out if there are any mixtures with safer ingredients that produce temporary crystals. https://en.wikipedia.org/wiki/Storm_glass Have one at home and it is pretty neat to watch.

I am facing problem that my drug ranolazine is precipitated in pH 4.5 acetate buffer with Sodium lauryl sulphate anf precipitation increases with increase in concentration of SLS, while in case of pH 6.8 Phosphate buffer no precipitation of drug observed in presence of SLS

Is it true that Cavendish did indeed discover most of the gas laws before the the people they are named after? And also why was he such an introvert? first topic in the chemistry section.

i am asked to write the formula of Copper oxide. shall I write Cu2O or CuO? Which one is correct?

I read on the magical Wikipedia that ethylene can be produced by distilling ethanol and sulfuric acid. So I set up my flasks, and mixed ethanol (denat. w/ methanol) with sulphuric acid from a photography chemical set. But then something unexpected happened: in the flask, small white crystals very quickly formed like sand, replacing about 2/3 of the liquid! What is this, and why did this happen? Thanks in advance!

To predict the outcome of a school project, our group requires many constants, most of which can be found in tables on the internet. Two of the values we need are the dissociation (or ionization) constants of acetic acid and sodium bicarbonate, respectively. We were able to find the dissociation constant of acetic acid, and many other substances, in tables like these: http://clas.sa.ucsb.edu/staff/Resource%20folder/Chem109ABC/Acid,%20Base%20Strength/Table%20of%20Acids%20w%20Kas%20and%20pKas.pdf. However, the dissociation constant for sodium bicarbonate could not be found anywhere after hours of searching. It is unclear whether this value can be calculated, or if it can on…

I need hard wearing gloves that are resistant to harsh laundry chemicals such as Oxy stain remover, washing powers etc. Is Nitrile coated gloves suitable for example? Or what about PVC?

I'm new here and my question is with regards to chemistry. Moderators if I posted in the wrong place, please move it to the correct place. __________________________________________ Can someone please explain to me the concept of intermolecular forces and the effects of intermolecular in: 1. Evaporation 2. Surface tension 3. Solubility 4. Boiling points 5. Capillarity How does intermolecular forces effect these things? I did try a textbook but it wasn't clear and missed some of those points numbered above. I know this is rather easy for most of you guys so please help me understand this as I have failed to grasp the concept. Many thanks

I need to know what are some clean and slow burning solid materials. Something that can withstand a lot of heat for a long period of time but eventually dissolve and burn away. Im really new to all this but i have a business idea and i need a little bit of help to achieve it. Thank you for you time and help reading this.

UV curable dyes/paints are, for example, used in high-speed offset printing. UV light 'dries' the dye in a fraction of a second... My understanding is that UV light polymerizes certain component of the dye turning it from liquid to solid. But for years one thing I cannot understand... In this particular offset printing example, there is a claim that UV curing speed is proportional to about fourth power of the UV light intensity. As a result, parabolic reflectors are made to concentrate UV light from lamps into a few-millimeters thin line across the web (instead of the light being spread over a larger surface). How can UV curing speed depend on fourth power of ligh…

Hi guys, I'm new to this site, so I don't know if people can see this or reply to it, but I've had some questions regarding the dissolution of table salt in water that I'd like some input on: In my high school chem class, we were taught that the reason the ionic compound NaCl dissolves in H2O is because the dipoles on the water molecule pull apart the NaCl. However when I was having a chat with my friend (chem major) and this came up, he said that what we were taught "made no sense" because the dipole-dipole intermolecular force in water is much weaker than the ion-ion intermolecular force in table salt. He then went on to explain that the Na+ and Cl- ions were only …