Hello everyone, in this video I'm going to tell you about such rare metal as a rhodium. Which we quite often don't notice that even when is hidden before your eyes. In this periodic table, rhodium can be found in the group 9 between cobalt and iridium Moreover, this element is a member of platinum's group Because chemical proprieties of our six elements belong to it are very are very similar. That is why they often found together in ores in Earth's crust. However, just like others platinoids, rhodium is very scarce, making up only two parts per trillion. Which makes the second rarest metal, being second only to osmium. Rhodium is most frequently found in Copper-Nickel ores from which it usually extracted. Along with platinum as by-product because of a lower concentration in ores, rhodium is quite expensive. One gram of pure rhodium metal, cost more than 80$ And it is just the market price. Rhodium is almost two times expensive than gold. However that high price no stop me from ran these experiments with this rhodium droplet. Rhodium is almost two time lighter than Iridium, yet it is more expensive. This metal hardness is also a quite high, being 1,5 z (ounce) times that of Platinum. Now, let's to consider this metal chemical proprieties. And see how similar they are to those other platinoids. In a classic experiment, when I'm heating up a droplet of rhodium with a powerful gas burner. (it will help us to see) How chemical stable this metal is. The heat twisted the tweezers where is the Rhodium droplet on a grossly slightly dark It is likely that it simplify covered with oxide layer which evaporated of surface of the tweezers Without wasting any time, I decided to test how malleable and plastic the metal is. And by the way, I also expanded the surface area of this metal for any further experiments. Forging metal which is two time more expensive than gold is not a big deal. However, in contrast to malleable Palladium, Rhodium turns out a be quite hard. And it wasn't easy to forge with a hammer. As I continuing to forge a Rhodium drop it broke into smaller pieces. Which shows that Rhodium is a extremely hard, but poorly malleable metal. Thanks to its chemical stability and hardness. Rhodium is useful to coating silvery jewel. And yes, usually when we wear a silvery rings, we don't even know that it look like it as the surface of metallic rhodium rather than the surface of Silver Silver is coated with rhodium, because this metal has a similar colour reflexes light well and protect silver from oxidation. Despite of being a chemically stable, Silvers forms black sulfide film on the surface Because of that it can quickly lose its shine a thin Rhodium layer silver prevent silver form fading because rhodium almost doesn't oxidize in normal condition in air. And, it is also rarely resistance to scratches and rubbing so, next time you have a look at the silvery jewels Try to see if it has a Rhodium shine Which a many mistakenly consider to be a Silver shine. However, lets us know do well on the shine property alone and learn more about other propreties of Rhodium If a piece of this metal is soak in concentrated Nitric Acid the metal remains unaffected, by such acidic environment Which is it is another confirmation of this metal is remarkable chemical stability However, when Hydrochloric acid is added and Aqua Regia is formed The metal flows and starts to loses its electrons forming Hydrogen, hexachloro Rhodium A (?) of a such red colour It is because of this colour that is metal received this name, Rhodium Which when it was translated from greek "rhodon" means "pink" Palladium and Platinum forms solutions have a similar colours in Aqua Regia Which is why these three elements are within a proximity to each other in Periodic Table If an Akaloid or Sodium Hydroxic is added to a Rhodium solution DPH (?) level will araise and the solution will become coloures However, despite a Rhodium fitness for ornamental uses more than 80% of produce of Rhodium Is not used to make jewelry rather it finds more practical and efficient applications such as in production of automobile motorcycles catalytical converters which help to exhaust gases in to layers hampful such convertors uses thin ceramic plates contrast with precious metal powder* mainly made form Palladium, Platinium and Rhodium which metal is usually responsible from a particular reaction Rhodium very well catalyses reduction of Nitrogen Oxides to gases Nitrogen which in terms significantly improves quality of air in cities in contrast to my preview chinese catalyst This one shows catalytic oxidation of propanol very well which confirms that it contains precious metals Including our Rhodium Besides turn nitrogen oxides into gases nitrogen The surface of catalystic also turns carbon monoxide into Carbon Dioxide and burns up as left over fuel *(?) Uselless such reactions run at 450 C degrees By the way allow the exhaust gas* such catalytic also releases particles of precious metal that is why it is possible to save* Palladium and Rhodium from the road dust In some dense population countries this is doing so* might even more effetive* that just collecting and duping such dust* into a landfield Rhodium powder it is used not to only to make car catalyst but also to make smallest devices for instances such as this catalytic hand warmer* This tecnology was originally developed by Zippo This device operate on a quiet way simple principles First,
