it doesn't seem to follow law of conservation because it supposed to weight the same form the start till the end.
it could be changed by making the alka seltzer be the same amount throughout the expeimrent even when added to the flask of water
An alka-seltzer tablet weighing 3 grams is added to a flask of water (weighing 250 grams).At the end
of the experiment, the flask weighs a total of 249.6 grams.Explain why this experiment does not seem
to follow the Law of Conservation of Mass and how the experiment could be changed to show the Law
of Conservation of Mass
2 answers
I think you've missed the point.Who says it should weigh the same? It doesn't follow the conservation of mass law because you didn't weigh all of it. You weighed all of it at the beginning with the 3 g tablet but when you added it to the water you set up a reaction in which CO2 (a gas) was evolved). If you performed this experiment I assume you SAW the bubbles of gas escaping. So the difference between the second weighing and the first weighing was due to the evolution (and escape) of the CO2 gas. The experiment could be changed so that you trap the CO2 gas and weigh it and it WILL meet that law.