A arthur kierski Well-known member Joined Feb 10, 2008 Messages 1,119 Location são paulo---brazil May 30, 2009 #1 can one use formic acid in an ar solution to precipitate gold(by boiling the solution until a fine powder is formed)??
can one use formic acid in an ar solution to precipitate gold(by boiling the solution until a fine powder is formed)??
L Lou Moderator Staff member Moderator Joined Nov 4, 2007 Messages 5,239 Location Rhodia Drive May 30, 2009 #2 Yes you can.
A arthur kierski Well-known member Joined Feb 10, 2008 Messages 1,119 Location são paulo---brazil May 30, 2009 #3 thanks lou for the information----is there a special procedure ? or just add formic acid and boil? thanks again
thanks lou for the information----is there a special procedure ? or just add formic acid and boil? thanks again
L Lou Moderator Staff member Moderator Joined Nov 4, 2007 Messages 5,239 Location Rhodia Drive May 31, 2009 #4 Formic acid will itself work, but it works much quicker if ammonia is added until slightly basic (pH 9). Oxalic acid also works. The reason why both of these acids work is that they both are oxidized to CO2 readily.
Formic acid will itself work, but it works much quicker if ammonia is added until slightly basic (pH 9). Oxalic acid also works. The reason why both of these acids work is that they both are oxidized to CO2 readily.
