Showing posts with label chemistry. Show all posts
Showing posts with label chemistry. Show all posts

Monday, January 10, 2011

Rhodium, the element of the week


This is a continuation of element of the week. My mom picked out Rhodium because she never heard of it. Rhodium and Rhenium (75) are easy to confuse. When I first heard of the elements I had a hard time distinguishing the two because they both start with "Rh". Now forget about Rhenium, and think about Rhodium.
Rhodium is a supershiny metal. In fact it is too shiny. It is shinier than platinum (78), gold (79), silver (47), and palladium (46). It is found in South Africa, Russia, and in minute quantities around Sudbury,        Ontario. South Africa is the world's leading producer of rhodium. Rhodium is prone to price swings. As of October 2007 Rhodium was worth eight times as much as gold, and thousands of times as much as copper (wow!). It is now still worth twice as much as gold, which is still precious. Rhodium is used in jewelry because it enhances the luster. Rhodium's melting point is 1966 degrees Celsius and its boiling point is 3727 degrees Celsius. It is a transition metal located around gold and silver, in what I call "the precious metals corridor".
Although it is a precious metal it is sometimes used in the manufacturing of cars, but I don't know exactly how.

Now you know more about one of the most precious metals. And now, inform all the pirates that there is a metal more precious than gold.

Monday, March 29, 2010

cabbage science

The other day I did a science experiment but did'nt post because I posted "flags of the nations" .Well anyways the experiment went as follows:
 You soak a purple cabbage leaf in boiling water and let it sit. You then get 3 cups all apparently containing pure water. In fact only one contains pure water, the others containing white vinegar and the other containing biocarbonate of soda (baking soda) mixed with water. You pour the cabbage water into each cup and strangely the water becomes pale purple, the vinegar turns red, and the biocarbonate of soda turns green.

The cabbage juice has the property of turning red in acid and green in alkaline liquids. The water which is neutral just waters it down.

P.S. If you are wondering about the second picture I did a real experiment like I mixed soapy water with the cabbage juice. As you can see in the picture it was neutral.