'Ap Chemistry – Gravimetric Lab Essay\r'

'By filtering and unhurriedness the carbonate after it has effectd, the mountain and moles of CaCO3 could then be found; with these values, a hero sandwich push-down stack of M2CO3 hind end be found. Using gravimetric analysis, it has been determined that the unbeknown(predicate) Group 1 metal carbonate colonial is K2CO3 (potassium carbonate).\r\nExperimental Sources of Error:\r\nA) The first source of computer shift had to do with the precipitation section of the lab. Not scarcely is possible, but it is almost guaranteed that the CaCO3 did non precipitate to its fullest extent. Attaining a precipitate that is 100% pure and is exactly of the constitution represented by its chemical formula would be extremely difficult. A second source of wrongful conduct was in the filter composition. No filter news report can be perfect, and it is very likely that it did non filter exclusively of the precipitate, which would then decrease not only the mass of CaCO3, but likewise t he molar mass because only the majority of the correct mass of the precipitate was found; by lowering the mass of a compound, its molar mass will also fall.\r\nB) After the precipitate had been filtered and dried, the filer paper that contained the precipitate was mishandled and its contents was scattered all over our lab bench. The dried precipitate had to be then self-possessed and then put back onto the filter paper; this contributed a large portion of charitable error to this lab. Spilling the dried precipitate is a source of human because it is almost guaranteed that not all of the precipitate was cool that had been spilled. This would have then lowered the mass of all of the following data, and wholly, our end result (i.e. molar mass). C) per centum error = your result-accepted valueaccepted value x 100 pct error = 128.79-138.21138.21 x 100 = 6.8157%\r\nConsidering that any percentage error that is under 5% is often generation considered accurate, a percent error of 6.8% can be viewed as fairly accurate. It is not too off the beaten track(predicate) off to completely disregard, but it is also not close enough to use as fact.\r\n'