Lab #4 -March 10
The recorded results from both part A and B of the lab support both of my hypothesis. Therefore I accept both my hypothesis, because in Part A the hypothesis stated that the mass of the compound would stay the same even after the reaction due to Lavoisier's Law of Conservation of Mass, even though there was slight change in the numbers it was a rather sizable difference of 31.563 to 33.121g, large part of this result is to blame in human error and possible mistakes (material and procedure) that occurred during the experiment, with an overall percent error of 4.9%. In Part B the color changed from pink to yellow because the two reactants together formed an acidic compound (NaHCO3(s) + CaCl2(s) + H2O →NaCl(aq) + Ca (OH)2(aq) +H2O), and we were able to see the change because of the indicator phenol red, this was all due to the change from basic to carbonic acid of the mixture. Reflection Lab #4 The Bags of Reactions Lab not only provides an interesting side of because double replacement, single replacement and reactions, it also shows us what exactly are we digesting when using Sonrisal tablets, and how they react to our stomach acids. How does it work?
|