This is a humidifier that works by heating the water. There is a copper plate that is a part of a thermal switch. The pipes are usually stainless steel color. Usually they get covered in limescale which I clean with vinegar from time to time. This time I decided to add a little vinegar to the humidifier water. After a week the pipes turned blue. What happened?

Any ideas what this is or how to get rid of it? I thought it was mold but it doesn't come out easily.

I’ve disolved some copper in hcl but the solution turned blackish brown insted of the green i expected does anyone know what happened ? On the photo there is some crystals seperating out (cucl2 maybe)

Is there a difference? I used sodium sulphate in microbiology research but magnesium since starting a project in organic chem

I’m working on a project that requires synthesis of a compound. This compound must contain a triazole. So I did click chem, used 2:1 sodium ascorbate and copper acetate respectively with my compound that contains terminal Azide and a terminal alkyne. I’m monitoring by tlc. The problem is my starting material (that contains azide) is still appearing after time on the reaction spot on tlc.

Can anyone help with a way to separate the azide compound from the new compound (that should contain triazole)

I don’t want to use column chromatography

After my dad passed I was cleaning out his shop and found an unopened jug of gear oil that’s presumably 10 plus years old. A quick google search say yes it does after a few years but the stuff is left inside millions of diffs across the globe for more than that all the time. So is it safe to use on my old Toyota pickup?

Ok so I’m looking for a chemist to help . I’m looking for a way to naturalize antifreeze . Or a detergent that will break it down . Upon a recommendation for winterizing my liveaboard sailboat,I put about a gallon of antifreeze in my bilge this winter before storing it in the hard . I used both the automotive and rv types - propelene gycol and ethelene glycol .) I’ve rinsed it out, but it still smells really strongly of antifreeze . To the point of actually feeling a headache from inhaling it in the confined space. I’m concerned because I’ve read it’s toxic to inhale . I will be sleeping aboard my boat every night this season and don’t want to get poisoned from breathing it in . Is there a certain type of detergent or chemical I can use to break it down ? Besides just a bilge cleaner / and or soap ? I’m not a chemist and figured this would be a good place to find someone smart enough to understand how to break it down . I’ve looked it up several ways online and can’t find anything specific , Thanks in advance .

I'm not sure if this is the right sub to ask about that or not but hope I can get some insights ,basically I work for a pharmacitical company as a purchasing agent ( I have just stared ) but I'm a chemistry graduate as well, we receive a certificate of analysis for each raw material we purchase and we have to match it with either a USP or BP edition but I figured out today that our quality control head validates that manually, I'm just wondering if anyone is using a specific software or there is a feature in their ERP system where they can match COAs automaticly once they are recived.

not sure if I can even post this here but I have a battery maintainer and the clamp is copper. the battery post is likely lead. I'm having an issue where I am getting significant corrosion on the copper clamp. it almost looks like it was set on fire. I'm assuming this is some type of oxidation? can anyone chime in on this and what exactly is happening?

Hi! What is the reason that my supposed to be LCV (by reducing crystal violet using zinc dust) doesn’t turn back to crystal violet and just remain colorless indefinitely even when added with strong oxidizing agents, such Potassium periodate, iodine, or even hydrogen peroxide with horseradish peroxidase. What could be the reason why? Is this really LCV or another byproduct from the reaction. I added the zinc dust in both excess and in dropwise, both did not work and does not turn back to the violet color. I cna’t really graduate if I don’t succeed in fixing this; please help 😭😭😭🙏

Margarine is promoted as a healthier alternative to butter as it contains polyunsaturated fat instead of saturated fat. Furthermore it also contains plant sterols, which compete with cholesterol for absorption across the intestinal cell membrane, leading to reduced cholesterol uptake, thereby improving cardiovascular health.

However, there has been a concern about trans fats in margarine for the past few years, and since then the manufacturers have made an effort to remove trans fat from them. But how do I know if there isn't any trans fat? Sure, the manufacturers do provide nutritional information which details any information about trans fat. But how credible are they?