First off forgive my ignorance. I'm no chemist, just a wannabe artist tyring to understand the chemistry of my pigments. I'm confused as to a formula I am looking at.
(PbCO3)2 · Pb(OH)2
I know PbCO3 = Lead Carbonante, and Pb(OH) = Lead Hydrate. But what does the 2 stand for at the end of each substance...compound, ...molecule?
An OH group is called an hydroxide, a hydrate has a · H2
O. The 2 after the parenthesis means the same as the 2 after the H in water -- we need two of the groups to balance the charge.
Does that mean for every two particles of PbCO3 there is two particles of Pb(OH) which means 50% carbonate and 50% hydrate?
No, this particular compound, or mineral, is made of one molecule of lead carbonate and one molecule of lead hydroxide bound together. These lead salts can also be found separately, but I don't think they were reacted with each other, probably, the rock or mineral is mined that way, or a reaction produces the combined salt you have here.
Also, why does the MSDS sheet for 100g of this formula described as Basic Lead Carbonate, say 100% PbCO3?
Many reasons are possible for the 100% PbCO3
. The assay may want to express the dual salt as lead carbonate equivalents. Also, basic lead carbonate is the name for this dual salt, the OH group makes any inorganic salt a base.
Also, is (Pb H2O2) the same as Pb(OH)2?
Nope, not even if it exists, which it probably doesn't. Different atoms, different molecule, no exceptions.
Lastly, does this link for a substance coined lead hydroxide carbonate = to about 66% carbonate to 33% lead hydroxide? Am I reading this correctly?
Yep, that explains this salt properly.
This is my first post here, so let I hope we can do a lil less socrates on this one .
Not a problem, you have a lot to digest here.