http://www.sgforums.com/forums/2297/topics/321047 en-US 60 <p>Hmm you confuse me... You say excess base/metal/carbonate which suggests you are talking about obtaining a soluble salt that does not have potassium, sodium or ammonium ions, but you also said precipitation.... Anyway, I shall answer to the former because it is most likely....</p> <p>Key source of experimental error... You may not have stirred the&nbsp;mixture well enough or heated it for sufficient time to increase reaction rate. As such the solution may still contain some amount of acid and not all of it may have reacted. Therefore there may be some amount of contamination.</p> <p>That's the best I could come up with. &gt;_&gt;</p> Fri, 20 Jun 2008 04:26:06 +0800 www.sgforums.com:2297:321047:8180977 MrSean http://www.sgforums.com/forums/2297/topics/321047 <p>For those experiments with gaseous products, like acid with metal or carbonate, perhaps the method of collection of gas could have error?</p> Mon, 16 Jun 2008 23:15:13 +0800 www.sgforums.com:2297:321047:8171782 secretliker http://www.sgforums.com/forums/2297/topics/321047 <p>air bubbles and parrallex error?</p> Mon, 16 Jun 2008 00:28:49 +0800 www.sgforums.com:2297:321047:8169005 4794 http://www.sgforums.com/forums/2297/topics/321047 <p>Does anyone know the key source of experimental error when conducting precipitation and acid with an excess base, metal or carbonate? I have trouble spotting them</p> Sun, 15 Jun 2008 18:22:49 +0800 www.sgforums.com:2297:321047:8168099 bonkysleuth http://www.sgforums.com/forums/2297/topics/321047