jCrownZinc204M2​ jpg
288px x 668px | 48.60kB

[source page]

Zinc Silver Green Patina 204b

Zinc Fingers Could Be Key to Reviving Gene Therapy - NYTimes.com

salud equitativa

Sat, 02 Jan 2010 15:00:00 GM

The technique, which depends on natural agents called . zinc. fingers, may revive the lagging fortunes of gene therapy because it overcomes the inability to insert new genes at a chosen site. Other researchers plan to use the . zinc. finger ...

How do I get zinc dissolved in hydrochloric acid out of solution?
Q. I put a penny in hydrochloric acid. The copper plating floated to the top after all the zinc was in solution. I want the zinc. How do I get it out of solution?
Asked by Grady Waters - Tue Jul 29 02:04:36 2008 - - 2 Answers - 0 Comments

A. The zinc will be present as Zn2+ ions. Sodium hydroxide will not reduce the zinc back to zinc metal. Sodium hydroxide will precipitate the zinc as Zn(OH)2, but too much will redissolve it as Na2ZnO2 or Na2Zn(OH)4. I would suggest adding sodium carbonate instead to precipitate the zinc as zinc carbonate. Be sure to skim off the copper before precipitating. This will give you a pure zinc salt. Getting this back to zinc metal is difficult - it can be smelted with carbon, but at the temperatures required, the zinc often boils off or burns off as ZnO. If you just want to get metallic zinc out of a penny, the best way is to melt it over an alcohol lamp or gas flame. The zinc innards will melt before the copper, and poking the copper skin… [cont.]
Answered by zircalium - Tue Jul 29 02:14:42 2008