Applied Chemistry

I recently saw a video of someone truning a penny a silver color and then a gold color. I know he used sodium hydroxide and zinc powder, can anyone tell me how to make these 2 products?

Being somewhat curious I discovered a local deposit of minerals not commonly seen in my area. I threw a couple of the more interesting ones in a PVC container and covered them with 100 ml. of common bleach (sodium hypochlorite solution). After a few days the liquid had a faint reddish tint. After a week of soaking the rocks the liquid has turned a beautiful pinkish-purple color. The rocks themselves look to be still solid with no slaking or crumbling. I am pretty sure one of the minerals in these rocks is barite (white barium sulfate). There is a little Iron stain on some of it. There also appears to be small inclusions that look like obsidian. There is also some type of…

Sterile seawater left at total rest for a looong period of time in a tall sealed container with no air; would it have more ions concentration near the surface or near the bottom ? I mean sterile to denote no influence of movement by microorganisms of any kind to affect the 'at rest status'

why the stability of borohydride cluster is anion>neutral>cation?

An enzymatic reaction takes place in 10 mL of a solution that has a total citrate concentration of 120 mM and an initial pH of 7.00. During the reaction 0.2 millimoles of acid are produced. a) Using the data in the table below, calculate the final pH of the solution. B) What would be the final pH in the absence of the citrate buffer? Assume that the other components of the solution have no significant buffering capacity and that the solution is initially at pH 7.00. c) What would be the final pH if the solution contained 120 mM of phosphate buffer instead of citrate buffer? Acid Ka (M) pKa _____________________________…

osmosis is like concept related to diffusion pressure deficit or chemical potential... which is strictly the fluid property...and gases r also fluids...so ????

Hi All, Does anyone have any references on uncatalytic oxidation of glycerol? Im looking for that process, in particular with hydrogen peroxide as an oxidant. I have difficulty in finding one. Thanks in advance

I am trying to use a filter to clean silica nanoparticles, but most filters retain the particles, the particles seem to have an affinity towards them. What membrane should I use?

i just want some one to explain to me the factors that effect kc and kp of solution

Please help to determine the (%w/w) benzoyl peroxide (C14H20O4) in a sample. Procedure: 2.500g of sample was dissolved in 75ml dimethylformamide and diluted to 100.0ml with the same solvent. (Solution T). To 5.0ml of Solution T, 20ml of acetone and 3ml of a 500g/l solution of potassium iodide were added and mixed .This was allowed to stand for 1min and then titrated with 0.1M sodium thiosulphate using 1ml of starch solution added towards the end of the titration as indicator. A blank titration was carried out. 1ml of 0.1M sodium thiosulphate is equivalent to 12.11mg of C14H20O4. The following data were obtained based on 2 titre values: - Sample Weight 1 =…

Here's my question if you boil water then convert it to gas and then convert it back to water will it redoes any other traces of elements in the water? After doing the above can the water be consumed? My theory: boiling water to make H2O become it's gashes form then having the gas go throw a glass pipe and past a portion of the pipe witch has a close to frozen area allowing the water to the slowly become a liquid will greatly redoes other elements that are found in water. I haven't tested the theory, so some informaton on this basic topic would realy help.

I was interested as to what happens when a current is passed through ethanol, or a water/ethanol mix. Does the ethanol separate?

Hello, I have big problem: In the country where I live: Belgium, It is very hard to find Kno3-, NaClO3-,KClO3-, etc-like stuff. Even worse, You can't buy many products with alot of "O". So after months of searching, I gave up. But recently I saw a video of burning sugar, and I thought: That's almoast thesame as burning KNO3!!. And I tried and tried, but my sugar does only melts. So my question is, how do I burn sugar? (Or can you give me an other good oxidator?) (sorry for the bad english, I normally don't speak english, and I don't have much time.)

Trying to catalyze some collaboration here. Anybody know of a way that would make this work in this thread?

Last night i receive an email from a person which i don't know who offer me a contract to become a middle person for her company that buy a chemical substance called "Cuastic sulphate". She said that this material is in fluid form and has an ability to penetrate diamond and vaporizes from inside. So, anyone here can give me advice?. I really don't believe this chick but she keep convincing me about the weird fluid.

Read somewhere that the felt pads placed on car battery posts were impregnated in baking soda. Baking soda works extremely well in removing corrosion formations, but for prevention, something does not 'click' These work very well; what are they impregnated with ? It is not dusty, it is not oily, it is not wet : http://www.therangerstation.com/Magazine/Fall2008/battery/felt_ring.jpg And they have lasted many years in my cars doing an excellent work.

What causes pieces of ice to stick to each other when left for a while? How do I prevent this?

Hi! I'm a 18 year old guy living in India and persuing my graduation in Biology.. I have a bad experience last night.. And I'm sorry for the incorrect English as its my second language.. Here goes the story? Last night I was in a celebration of my friend's b'day and there were two bottles of pepsi present there.. One is sealed pack pepsi (1L in plastic bottle) and another one is 300 ML in glass bottle... When I drink both of them I found that there was lots of difference among both.. The glass bottle one was seems to be fake as it was too much bitter and having a foul smell in it.. Much similar to smell of contaminated water.. I'm sure that pepsi…

well i was just wondering about this topic for quite some time now but couldn't make any odds out of it. just think : what and why do we have the concept of stability? commonly said an unstable substance would disintegrate or undergo some changes to attain a state of stability... like any ion or radical would react any reagent available to form some product. now just imagine that a during the course of some reaction some unreacted unstable intermediate is formed which couldn't react with anything as the other reagents are exhausted and the whole system is isolated... what would happen to it? it would exist in that unstable state forever( as long we keep it isolated) becau…

h2o2 a greener alternative to chlorine

In The Elements by John Emsley there appears the following in the description of most Rare Earths: "...of the so-called Rare Earth group (more correctly termed the lanthanides [or actinides])" Is there some doubt about the correct classification of the lanthides and actinides?

Don't ask how it happened, but I spilled bleach into my mother's stainless steel kitchen sink and it left patches of unsightly corroded metal. I know that the stain is chemical, but there's gotta be a way to reverse it or sand it off without further damaging the sink. Any suggestions? I don't want to buy my mom another sink. Any help is appreciated.

Do chemists mix chemicles all day. Making up different compounds. And isn't a guy making moonshine a chemist?

Hi People, Trying to make turbidity standards (NTU), but non formazin type. That is the new way to go, as formazin degrades quickly. Any tips appreciated.

Hi every one i'm new Can anyone tell me what the answer is