Make Silver Testing Solution to Detect Fake Silver
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- čas přidán 9. 07. 2024
- In this video we show how to make the silver testing solution that's usually sold commercially for detecting fake silver.
To do this we just mix 0.5g of a dichromate or chromate salt. I used Potassium Dichromate. Then we add 10mL of water and 7ml of 70% nitric acid. After a good shake that's all.
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You got one of the best macro shots I've ever seen on youtube with this video. Excellent.
Excellent work! This is very useful information for quick spot testing of materials and will be very helpful to me in the future. Many thanks Nurdrage, you are the best!
For coins you generally don't need to go that far. There are many ways to know it's a counterfeit before hand. Plus you would damage the coin with a scratch test which might be just silver plated anyway.
"Welll, that's a big relief", said NurdRage. A big relief of a leaf on a platinum coin.
Pun game too strong! ;___;
God that's good!
Just wanted to pop in to say how helpful these videos are for reference purposes when I inevitably forget to write the formula down and don't feel like trudging through forum bookmarks to find it. I've been going through all your old videos when I need a process reexplained to me.
I can watch these three times and learn something new each time.
...that probably says more about me, but oh well
Currently working on step 4 of the pyrimethamine synthesis. Also working on a video demonstrating a Soxhlet extractor.
Yay! I can't wait for it!
nilered has done a few with the extractor and the wiki has an awesome gif for the mechanism
I can't stress this enought:
I WANT MOOoooOoRE
love
dalitas
good luck
Dude, I was looking on the internet and I can't find a really good video on extracting (if that is a correct term) precious metals from car catalytic converters.
Some sources that I found, but I could not verify them said that some of these converters can have 1 to 2 grams of platinum.
Cody's Lab here on youtube made a video that found a relatively large amount of platinum in highway dust.
Used catalytic converters are relatively cheap at junkyards and I never seen, at least in my part of the world, people looking at them with interest... I even heard that you can buy at my local junkyards catalytic converters at the price of junk metal like aluminium or steel.
It would be very awesome to see how much precious metals, and which kind you can extract from these things that sometimes are just sitting around the junkyards.
+Archer Sterling you would cut out the parts with the precious metal and then use combinations of acids to selectively get them into solution then use a reducing agent to get back the bade metal (and then melt it) it's the same principle as Cody uses but you will just have to adapt it to the converters
Great informative video! Thanks!
very great work.
Thanks for the video.
great video as always!
amazing content, bruv!
What a great video. Had the platinum coin reacted, you could have argued that they'd sold you a fake.
"Now, no moron in the universe will sell you platinum as fake silver" - one of the funniest things I've heard in a while! XD XD
What would this do to nickle or chrome plating?Would it react to gold plating and, thereby, react to gold plated silver?What about silver alloys such as assorted Sterlings, Vitallium and silver solder (silver, tin, lead being one of the more common ones)?
What camera setup do you have?
Not as good as yours i admit. You have fantastic quality! :)
I think both of your camera set ups are pretty good. NurdRage tends to have higher contrast (less glass against white backgrounds), and NileRed has fantastic and unique ways of using glassware to illustrate. (mad scientist lab set ups. :))
Out of curiosity, what is the camera? It's pretty nice. I use the GH4.
FDR-AX100
Looking back i probably should have gotten the GH4. The GH4 can do everything the FDR-AX100 does and do it better for cheaper.
+NurdRage the body alone is less expensive, but you need a lens as well!
It would be nice to see how it reacts with nickel brass
You showed the solution had no effect on platinum, but just out of curiosity what would that solution do to palladium? Also nothing?
what is the attachment you connected to the round bottom flask called that prevented back flow when you were producing hcl from NaHSO4 and NaCL?
Just received a silver coin just like that one..What’s the name of that silver coin and who is producer
Thanks!
Can you make a video on the Marquis reagent?
I know what components are required to make it, but I'd like to see this style of video about it. I've already seen the one made by backyard scientist.
Isnt there a way to test it that uses the silver to catalyze a reaction? As to not scuff up the coin?
Does it give you a positive response for silver nitrate?
I couldn't hep but think that if the coin WAS tarnished, the store would have some explaining to do about their "platinum" coin...
I have sitting here a very old Chroming Solution containing Potassiumdichromate. How can I get rid of it, or even recover the Chrome?
So if a 'silver' coin is fake, what metal(s) would most likely be present in the fake instead? Is it usually zinc or iron, or is it some other metal? If the coin was chromium-plated, there'd be no reaction with the solution, right?
Out of curiosity, how much would you have had to pay for the coin if it were somehow damaged in your care?
Do you think you can recreate the green water in the Rio Olympic pools with a plausible mechanism? And maybe what it would take to clear it up?
Very useful video. We that follow precious metals know that the real price of silver, if gold is $1300, is around $80 an ounce. I behooves a person to have silver as a hedge for the hyperinflation that will hit when the US dollar is removed as the world reserve currency,
This was interresting
hey nurdrage could you upload video on gold testing solution.
I love all his videos, but I would say odds are he keep that platinum maple leaf. I would have. :)
هل جربت معى البلاديوم!
2:37 are you sure the reaction is correct? You can't really get hydrogen from HNO3 + metal, can you?
why would make fake silver of platinum?
please
Possible way to make a gold test solution
Is making this at home cheaper than the solution sold commercially?
So it is a great test for fake platinum too?
lol
@@hgmercury7279 what's that supposed to mean?
@@uxleumas i dont know
i dont remember what i thought 2 years ago
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can you guide how to make gold test solution? ... 24k, 18k, 14k.v.v. thanks
Ins't better the acquaregia? Using it we can even estimate what metal and silver concentration composes the coin..
You would have to dissolve too much of the specimen and, if it is not a pure metal, there is no guarantee that you would get a proportional dissolution. For example, with sterling, the copper is not going to dissolve at the same rate as the silver.
And you don't want to use aqua regia on silver, as you get messy silver chloride., which passivates the reaction.
Try it with a lead surface for a yellow precipitate.
How deep does it eat into the sliver? Could you just use pot metal and coat it in silver?
Yes. His test is only valid for a pure coin, whatever the metal may be.
To properly test gold or silver with test solutions, you have to put a nick or scratch into to specimen, to get through any plating that may be on the outside. Obviously, you do not want to do this on a specimen that has much value outside its bullion value.
As far as I know, all the fakes so far can be detected by careful measurement of diameter and thickness, as well as weight. A specific gravity test would add another data point. These are all non-damaging.
How about a test solution for Nickel?
What should I do if I accidentally spill a beaker of chloroplatnic acid?
*dramatic musical buildup, then speaks softly* Run.
Carefully wipe it all up. If necessary, redissolve and reprecipitate.
Would a drop of Na2S solution with a drop of acid (HCl) on the silver metal turn it black? (Ag2S). Not sure if the in situ H2S is enough.
Na2S and HCl wouldn't work since it will give very similar results with other metals too.NaCN and Na2S will be a 100% accurate silver test since it blackens the surface of silver on contact but it would also be extremely toxic though...
+casaverdero not only that. Na2S reacts with HCl pretty powerfully to form NaCl and gaseous H2S. I had to mix these two this year. You know, S2- ion recognition. I just dropped about 1 g or 0,5 g of Na2S to about 15 ml of 0.2 mol/l concentration of HCl. I didn't really expect such a violent reaction, but then i needed to smell H2S. First i tried to do it carefully, but when i realised, that i don't feel anything different, i put my nose closer to the tube. Then the smell got me. Wasn't able to smell anything for half an hour.
Oh and you can't use NaCN too. It reacts with any acid to form HCN (lethal gas) and a Sodium salt.
McVidsAndTutorials I'm so suck of wannabe-experts, "I did this once so I know everything". Generating H2S gas is the point, it reacts with silver to tarnish it black (Ag2S). The question is if it happens rapidly enough to be visible.
Both HCN and H2S are very toxic, with a similar mechanism of toxicity. But you will never reach dangerous levels of either gas in a small metal test, for two reasons. HCN is miscible in water and a H2S has a good solubility too, only minute amounts should bubble out.
+McVidsAndTutorials I never said mix HCl and NaCN i said Na2S and NaCN.NaCN dissolves gold and forms Na3[Ag(CN)4] then Na2S breaks this complex and forms black Ag2S.This can only happen to silver or gold and since gold has a characterisic color its 100% guaranteed to identify silver.
How much was that platinum coin
Looks like he bought this: online.kitco.com/buy/3105/1-oz-Platinum-Canadian-Maple-Leaf-Coin-9995-3105
About $1.2k-1.5k(depending on time of purchase)
Fortunately the value is stable enough and minting is cheap enough that even if the coin was damaged, he would be able to get most his money back even if scraped.
Like 800 in todays market. Maybe 1000 back then. Platinum cooled off in price.
Would copper turn blue?
Can you buy those ingredients at your local hardware store?
Only from eBay
Who lets you return a platinum maple? Lol. Excellent video tho!
That platinum coin is sooo expensive 0.0 I'm currently into Copper Ingots Bullion 😂 I think copper will go up in price.
Was hoping you would use copper or brass
I found this Silver Tasting Solution quite delicious... and deadly
Shot in the dark here, but is there anything that you can do to test between bone, ivory, or synthetics?
Tomato Broth if you kill an animal to get it, it's usually not synthetic. Ivory if you shoot an elephant.
Tomato ketchup u need to learn more
nice
Could you use just nitric acid and see if the reaction with the silver being tested turns a white color?
Why did you say "Could you not" rather than "Could you"? "could you not" sounds very impolite like an admonishment .
Sorry about that, I meant no harm in it
alrighty then, just keep in mind for others in the future. To answer your question: nitric acid also dissolves other metals so it wouldn't be able to tell you that something is silver
Can I touch the silver with my hand after the test?????
I assume gold would also be unaffected and probably it wouldn't touch iridium either since not even aqua regia can dissolve that.
you are right abiut gold. Not sure about iridium
how on gods green earth did you get ahold of that beautiful platinum coin.
Hey NurdRage are you going to make hydrogen peroxide in the future?. I know it is pretty simple to make sodium peroxide but going from sodium peroxide to hydrogen peroxide is another challenge. I think it involves sulfuric acid precipitation.
not sure actually, i'll see what i can do. but first lets get this pyrimethamine synthesis out of the way. :)
+NurdRage are you one person as I suspected? or are you a group of people as other commenters were saying (think it came up on another channel), as evidenced by different hands in experiment
It would be also nice to see the process of making Hydrogen Peroxide via electrolysis of Sulfuric Acid and then vacuum destilation to collect the H2O2.
soooo how long until those videos using chloro platanic acid come out? still waiting :D
My screen is broken.
Lol, nice thank you
I find it strange that i just ordered 45 oz's of silver then you post this vid lol
It would be nice to have a non-destructive test for silver, though.
true. Magnetic and density tests are non-destructive but a good forger can fool that too using the right type of alloys.
The best foolproof non-destructive test i know of is X-ray fluorescence spectroscopy. Unfortunately the instrument for that is a bit beyond the budget of an amateur.
For numismatics it rarely gets to that point for coin dealers. To spot a counterfeit you look for: the strike of the coin, the wear of the coin, the weight, dimensions. You don't want to damage the coin with a scratch even on the rim and even if you do it can just be silver plated. For expensive coins they have them slabbed by companies called NGC, PCGS, ANACS, ICG. They guarantee authenticity and they give a grade.
Many forgers will use the exact amount of silver because they're concerned with numismatic value. Also you should have tested on some silver coins not just bullion pieces. There's 90% silver in a morgan dollar and in US coins that are 1964 and earlier. There's 40% silver in US half dollars from 1965-1970. There's also Canadian coins with 80% or 50% silver. More items to see different reactions.
+hardworker424 The objective of this video was silver testing more for bullion rather than collectors. For a scientist who makes chemicals out of silver, we often buy silver bars and occasionally we would like to know if they're authentic. We don't really care about appearance.
NurdRage If you're using it for experiments and you don't care about the look a surface test is not enough imho. Drill through it, then test it. Generic silver rounds and bars can contain less silver because there's no real accountability. I'm no where near as knowledgeable in chemistry as you are but I do know if the item is 80% silver and you need it to be 99.9% silver there will be problems.
1200 for that coin lol can see why you would still be a little worried even though you knew it shouldn't do anything
What about fake silver you get off of ebay?
Hello. Is there a chemically tested way to determine if we exist in a universe that is theorized as comprised of mostly dark energy ( not dark matter we know what matter is ) with 70% or so of this almost undetectable property everywhere around us,I was thinking (ouch) is banging particles at near light speed the way to go or perhaps chemically examined could provide an easier,cheaper result. Patron.PEACE...
Wow, a $1200 purchase for 20 seconds of video. Just wow.
because chemistry ftw
99 problems I guess in this case, a lack of chemistry ftw. :-)
Well, it's not like he blew all that money. He bought platinum, and retains that same value in precious metal, that he can turn back into cash as he pleases. It's like buying stock, versus buying champagne and drinking it.
He played with it then got his money back the seller got a scratched acid smeared coin and probably was out shipping costs and insurance. Kinda sketchy.
test for platinum and titanium may be nice...
Didn't have any old quarters or dimes kicking around?
Not sure if they made 25 Canadian Peso coins in silver.
dont you hate it when you buy a silver coin and it turns out to be platinum, sucks man.
monimoni0147 yup man happens all the time! These scammer are getting smarter 😂
how much was the platinum coin worth?
I just looked it up, looks to be in the 1200 to 1300 USD range.
thanks
Spot Platinum is 1150 USD. $50 over spot is pretty crazy.
thats a pretty normal spot % tho, doesnt take much in the market to change by 50
+Sklin I agree tbh
What exactly makes chromates so bad for you?
They are highly oxidizing so they can oxidize all kinds of biomolecules in your body such as DNA. Damaged DNA can in turn lead to development of cancercells.
Hexavalent chromium . It is actively transported into cell, where it causes DNA damage in various ways (adducts, ROS, hydroxyl radicals).
+PieterG159
That is not the mechanism. Example hydrogen peroxide is not carcinogenic.
Could be, I'm not a specialist on this topic after all but I'm pretty sure it has something to do with its oxidizing properties. In general, oxidizing compounds are harmfull to some extent. Hydrogen peroxide might not be carcinogenic but it is toxic for cells, hence its use as a desinfectant.
Wait. If oxidising compounds are harmful, then doesn't that mean the oxygen we breathe is killing us?
If you put that stuff anywhere on a collectable coin, it might as well be made of fake silver after that.
Not really. It would still have its bullion value - you would just be destroying part or all of its collector premium value.
do this on your fake electrode's!!
How much did that platinum coin cost
Spot platinum is at $1150 so a little above that.
+hardworker424 thanks
Hardcore.
So, What did a platinum loonie run you?
About $1300
Ow
how much for 1 Oz platinum coin
Damn, thank you. I thought it was more valuable than gold, guess not right now
+Dan Sullivan I was surprised how much platinum has devalued.
Nooooo waaaayyyy you're Cody
You called the iron steel before you monologued
Why not just use a touchstone? Just rub what you know is the silver you want on the surface and then rub the mystery metal next to it. If the traces don't match, you know that the mystery metal is not what you want. It maybe silver, but it might be too pure or not pure enough or mixed with something you don't want like copper.
Good question, ask all those silver traders that keep buying copious amounts of this solution. I'm just here to explore the science :)
Of course.
a lot of people do so (and also did so in the past. In preindustrial times you could see people wearing lots of silver and carry a small touchstone around with them for trading purposes), but there are different purities of silver and different alloys that can lookalike on a touchstone, especially if you are not used to using the touchstone (you need to get used to *your* touchstone, others look differently). So its some kind of art, whereas the chemical one is science. Though both methods do not tell you anything about the purity of the silver. Would have loved to see this with common silver alloys
Man! I wish I wasn't 10 so I can actually no what he is talking about
That is how I started! Keep reading and studying! Never forget that math is important as well!
"I bought this coin for thid video and intend to return it when im done"
Rip seller :( Completely understandable but a dickmove in the end.
The true nerd sells electrolytically silver-plated coins
I have noticed that if I comment early, I will usually get a reply from the video uploader...
NO, ALL LIES!!!!
What happened to the p-chlorbenzyl chloride?
+Mitchell Fream currently fixing it, it'll be reuploaded with the fixes in a couple of hours
+NurdRage Oh ok :)
+NurdRage can you tell us what was wrong with it? what are the mistakes? jeez i can't wait
whoopsy , its ms64 or was , oh well
I found I collected a fake silver :(
Platinum is cheaper than Gold these days... Damn "Gold Fools" buying up all the metals.
LOL, personally, i'd want platinum to be dirt cheap because it so useful for chemistry. Pisses me off that everyone else is using it for worthless things like money and coins... pfft!
NurdRage Yes, I agree. Physical money. Blech... What a worthless use of a limited resource on the planet.
On the contrary, using resources for physical money stores them, whereas using them for something like chemistry or industry effectively consumes them much of the time, depleting that limited resource.
I wish we had copious amounts of platinum. I want it to be as common as aluminum :)
What is better:
Having a pound of platinum sitting in a vault
Or the understanding of chemical processes that let us further expand our understanding of the world.
its so interesting but im used to the german names so i dont understand what the fuck is what
FIRST
This makes no sense, here i have a silver coin for you, oh let me check if its real silver, crap now its ruined : ')
As said in the video a scratch test and then using the solution on the scratch marks is better since it causes much less damage. If you're buying silver for bullion then it doesn't matter what it looks like as long as it's real. If you're buying silver for looks then as long as it looks good does it matter if it's fake? If you're buying for both then you need to find a very reputable seller like a mint or a bank whose reputation is above reproach.