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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: fran008 on September 18, 2005, 12:11:49 PM

Title: lead hydroxide with acid
Post by: fran008 on September 18, 2005, 12:11:49 PM

Pb(OH)2 reacts wirh dilute HCl in what way? Does it form PbCl2 and H20?

Title: Re:lead hydroxide with acid
Post by: lemonoman on September 18, 2005, 04:53:26 PM

Well, if Ph(OH)2 is soluble in water to any measurable degree (refer to solubility constant) then the Pb2+ ions will definitely be dissociated from the OH- ions.  And if you add H+ ions from a dilute hydrochloric acid solution, you're increasing H+ in a solution which ALREADY has elevated OH- content

And remember that Kw = [H+][OH-] = 10^-14...the product of those two concentrations can't exceed that number.  The concentration in your case HAVE to decrease somehow...and the acid/base reaction you suggested is an ideal way to do that.