Applied Chemistry

I know my wee wee contains ammonia and i'm sure this is a volatile substance when mixed with nitrogen. Would it be possible to boil down to collect the raw material? How plausable is it to make a small incendiary device/firecracker utilising "organic" methods?

is it possible, in any way, to destroy a diamond.... i know they are the hardest substance on earth, but is it possible.... e.g. put them next to a nuke! or in a black hole ps. dont use another diamond!

This regards non-ss steels. Why do some steels only rust very superficially with a thin layer and others rust in a fluffy manner and rust right through? Is it the manner in which they are made/moulded or the composition or both?

For school, we performed a back titration involving one brand of aspirin and were told to determine the quantity of acetylsalicylic acid in a single tablet. sodium hydroxide was added in excess then the solution was heated. the excess unreacted NaOH was then reacted with HCl. my calculations are as follows: V(NaOH) = 0.04085L c(NaOH) = 0.111M hence n(NaOH) total = 0.00435 moles v(HCl) = 0.01778L c(HCl) = 0.0582M hence n(HCl) = 0.001035 moles number of moles excess = number of moles titrated of HCl hence 0.001035 moles didn't react with acetylsalicylic acid the number of moles of NaOH that reacted with acetylsalic…

Image is given below, for blank (H2SO4, 5%) and for 10ppm quinone sulfate

I'm currently reproducing an experiment for a case study, and it concerns a topical application of horseradish peroxidase (lyophilised, 200IU/mg, dissolved in water, activated by H2O2 15%, in a 15% H2SO4 buffer). H2O2 was stored at 4°C, diluted with H2O stored at room temperature, the buffer was also at room temperature, and the process was conducted at 20°C. Working with peroxidase for the first time, I'm having doubts regarding application and handling. I've diluted the HRP with water 1 ml/mg, activated and added the buffer in a ceramic dish, and applied the mixture at room temperature using a PVC syringe, and covered over the area with a cellulose gause to…

I am doing an experiment which involves starting a fire with a magnifying glass. I need help in coming up with what variable I should vary. So far I have come up with absorptivity of the material, light source, the color of the light source, and also the environmental factors (humidity, altitude, oxygen levels etc.). What are some other possible variables for the burning glass experiment?

According to Wikipedia, the autoignition is defined as: What is the derivation of this equation? Is there even a derivation?

I want to make a reagent with cupric chloride. I watched a video showing placing copper in a jar, then adding hydrochloric acid and hydrogen peroxide. After stirring he ended up with a green solution, however my recipe says I need 30 grams of cupric chloride, so how do I get a solid (powder) rather than a liquid

i was wondering when figuring out the value of E° cell which equation do i use?1. cathode - anodeor2. cathode + anodethe OAT Kaplan book gave the second equation but the Kaplan MCAT book is giving me the first equation

The DIY method uses a container of water with store brought Hydrochloric acid & chlorine in the right ratios, to permanently smooth the surface. As latex gets used over time it slowly gets scuffed by small wear & tear & the need to re-chlorinate is usually needed. However in the life of the rubber this method can't be done more than 2 maybe 3 times without discolouring dark colours & more than half a dozen times will turn the rubber brittle & weak presumably from the harsh chemicals. So a few questions: Can chlorine gas be used all by it self say in a industrial controlled way? If they had pure chlorine gas without the acid. If s…

Hello, I am working through my chemistry homework and hoping someone can tell me if I am on the right track or not. Q: A 0.500g sample of naphthalene (C10H8) is burned in a bomb calorimeter containing 650g of water at an initial temperature of 20.00oC. After the reaction, the final temperature of the water is 26.4oC. The heat capacity of the calorimeter is 420 J/goC. Using this data, calculate the heat of combustion of naphthalene in kJ/mol answer.pdf

I didn't remove the tag and now when I smell it it has a weird chemical smell. Is it safe? what is it?

Hey who has some ideas on how to measure polyalkene glycol (PAG) in the form of neptune aw - 32 hydralic lubricant ppm in swimming pool water? It would be nice if its possible to do in a simplistic and repeatable way or if there is even some kind of process sensor that measures PAG. Cheers

I am trying to make a fissure vent volcano instead of the normal mountain. Thought it would be a neat idea to have a container of CaO in a thin plastic container, add water and produce some steam. The heat would hopefully melt the plastic a little and drip into a container to produce the (hopefully more exciting) vinegar/baking soda reaction for magma. I think that the CaOH2 that would form would not produce the gas I would need to foam a soapy vinegar solution, though. Any ideas? Would adding washing or baking soda to the water that combines with CaO make it happen? Better ideas? I've been out of chemistry for a while. So I'm making sure there are no dangerous/pointless …

Hello, I am experimenting with bubbles to transfer onto paper to get interesting textures for my drawings and I was wondering if I could add anything to the mixture to diversify the textures I am getting. Maybe something that reacts with any of the components in the mixture but will still create bubbles when blown into a cup. Right now the mixes consists of diffent dilutions - with water (to get the desired tonality) - of indian ink, dishwashing liquid and sugar (to increase the strenght of the bubbles). To one tone I added salt which seemed to make the mixture more dense(?)(or it could be that the ratio of other components vs liquid was..unbalanced). Adding the sal…

Hi. Somewhere I read that electrolysis deposits collected on electrodes depend from the elements available in suspension and the voltage used. How was that ? Can someone explain or direct to a link to learn ? Does it mean that a 0.1Volt potential can deposit/separate perhaps one or a few elements; 0.5 V yields some additional more; 1V gets even more ? Where to find a table that relates voltage used for electrolysis and elements deposited ?

Hi all, Hopefully someone can answer this. When buying a variant of a product that has been lyophilized, what is the standard method of rehydration? With certain food products it seems to be no more than mixing with some sterile water, is this true of all products? The reason for the question, so please excuse the non scientist slant, is that i have a final stage interview for a role in sales for a company who produce many products across their portfolio. On reading up on all of the literature they gave me, the products include for lyophilized versions for when they export mainly. To give me the best chance with them, i'd like to understand the process that cus…

Hi. There is several contact cleaners on the market, but none I have seen truly restores bronze/brass surfaces as factory new. What formulation could you suggest that would leave all surfaces shiny with no deposits, removing surface corrosion to bare metal ?

Hi there. I am a newbie at chemistry but I'm trying to learn as quickly as possible. Any help appreciated! I'm looking to develop a new type of hot water bottle that's sealed like a heat pack. I'm looking for suggestions about how to identify the best liquid / gel that I can use in the hot water bottles that once heated will hold its heat for as long as possible (I can top up the heat over an 8 hour period but battery size is limiting on this). Can anyone help me understand how to go about this or simply suggest some liquids or gels to use?

Hello Chemistry gurus. I have an issue and I hope you can help me. I have a solid dose product in a 625cc HDPE plastic bottle capped with an induction seal that is experiencing paneling (walls of the bottle are sucked in). The product was recently changed to include Zinc, Manganese and Copper. The product also contains Calcium Citrate in high levels. We have not experienced this issue in the past before changing to this formula and we also pack this formula into smaller bottle sizes which are not experiencing this issue. The bottle is significantly deformed and due to the vacuum created by the foil liner induction seal it doesn't reform to shape unless you open the …

I need to solve a problem for which I need a compound which will remain unactivated in a low humidity environment for up to ten years, but react strongly to the introduction of water and give off a strong odour. I would be interested in working with someone who could provide options for this scenario. cheers.

Hi Everyone, I plan to conduct an experiment where I need to use liquid with significant dielectric constant which acts as an isolator. Water has er = ~80 but is a poor electric isolator. Izolator oils have er ~3-5. What is more, I would need much higher values of er, like 1000. Solid material presents values of ~10 000 (barium titanate). Do you know liquides with high er and very low conductance? Are there any theoretical limitations to reach values like in the solid materials? Thank you a lot!

I am looking for a formula to calculate how much acid (in mL) do I need to add to my pool in order to set the pH at 7.2 if my pool pH reading is 8. Can anyone advise? (I am planning to enter this in excel as a calculator).

Hi all. I'm a teacher and wish to replicate this (smaller scale because of money) with my GATE students. My question is, how much would I need? Again, I want my students to be able to experience "walking on water" without breaking the bank.About how much cornstarch and water would I need?