These guys those guys

In this mini lab we explored the conservation of mass? What is the conservation of mass some of you chemistry newbies may ask? The conservation of mass, in its simplest form, states that mass cannot be created nor destroyed. In this lab we had a big beaker, and a small beaker. First we massed both beakers. Then we poured in two fingers of these guys which made the weight of the beaker stand at 148.10 grams where before it was 82.23 grams. Then we filled the little beaker which weighed 29.18 grams, with baking powder that made the new mass of the whole beaker 30.17. This means there was approximately 0.99 grams of baking powder in there. We slowly added the baking powder to the vinegar (slowly so that the fizz didn’t fizz over the entire beaker) and we noticed that a white foam was produced! Now adding the baking powder should have meant that the masses (0.99) of baking powder plus the bigger beaker mass (148.10) should have added up to around 149.09 grams. Consequently, we observed that the mass of the new solution was only 148.66 grams. Wait, the law of conservation says that mass cannot be destroyed… This means that the foam produced a gas of approximately 0.43 grams! This means that matter is conserved in a chemical reaction, but it is changed to a different form. You know this through the calculations you make during the lab that show how much baking soda was turned in to a gas form when added to the vinegar. The gas of the solution is predictable due to the fact that it is dependent on how much baking soda you add to the vinegar because it is that, that is causing the chemical reaction and gas forming in the first place. This would most likely just apply to substances that react with the vinegar (these guys). If there is no chemical reaction between the two, you will not have any gas produced. Now I talked about the calculations that went along with this experiment, but lets go more in depth. We graphed our data and realized that our results fell beneath the line of best fit on our class data chart. This means less gas was produced due to a couple of reasons: We may have added the solids slow causing less of an intense reaction producing less gas, or some of our solid could have stuck to the beaker causing a slight difference in the amount we added. Due to these calculations we figured out for every 1 gram of solid added .4265 grams of gas were produced, this meant that there was a constant slope in the graph making it a linear graph. Just plug in 5 for x to the equation .4256x + .0834 to get 2.21 grams of gas produced. This also means 44 grams of gas are produced for every 84 grams of solid. Now to find out how much gas would be produced for any amount of solid, lets say 5 grams, you just plug 5 in for x in the equation giving you the amount of gas which in this case would be 2.21g. To find out how much solid if 5 grams of gas were produced you simply do the opposite. Plug in 5 to x/.4256+.0834 and you get 11.83! Science is a magical thing! You can also determine a rough estimate of both of these equations by looking at you graph’s axis’ according to the variable you are searching for.



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