BolinskyA



Mendeleev: Predicting the Future? Engineer: Liz Berger Runner: Andrew Chawluk Wiki: Aaron Bolinsky Photographer: Jackie Curtis

Purpose: To find the density of Germanium, period 4 element, by finding the average densities of elements in the same group.

data:





conclusion: to find the average density of Geranium, use the best fit line equation to find the average density. plug the number 4 in for x and solve. you will then find the average density for the element Geranium. to get the best fit line equation. we found the the the mass and volume change for silicon, lead, and tin. we then found the density by dividing the mass from the volume change. after finding the density, we then found the average density of each element by adding up the density's of each trial for each element, then divide by 3. 3 being the total number of trials. repeat for 2 other elements. we then took the period number and average density of each element, graphed them in a scatter plot and added a trend line with best fit line equation.



Lavoisier a Liar? Can Matter really neither be created nor destroyed? Engineer- Liz Berger Runner- Andrew Chawluk Photographer- Jackie Curtis Wiki- Aaron Bolinsky

Purpose: Lavoisier stated that matter is never created or destroyed during a reaction. Our goal for this experiment is to see if Lavoisier's statement is true, or if matter actually is created or destroyed when when the reaction happens.

Data: Before Reaction Mass of empty beaker A- 10.7335g Mass of compound placed in beaker A- .7500g Mass of empty beaker B- 10.7335g Mass of compound placed in beaker B- 1.2006g Total mass of compounds placed in beaker A+B- 1.9506g Mass of clean filter paper- .8522g

After Reaction: Mass of beaker A & filter with compound-50.9056g Mass of compound recovered in beaker A- 39.3199g Mass of beaker B + compound- 61.1456g Mass of recovered compound in beaker B- 49.5599g Total mass of both A&B compounds- 88.8798g

Total mass of compounds before the reaction- 1.9506 Total mass of compounds after the reaction- 88.8798g

Conclusion: Before we completed the experiment by putting the beakers on the hot pads, we had to collect some data first.We had to collect the mass of empty beaker A, which was 10.7335g. The engineer then had to collect the mass of the compound that was put into the beaker A which was .7500g. We collected the same data for beaker B and the compound of beaker B. Empty beaker B had a mass of 10.7335g, and the compound's mass was 1.2006g. Along with the beakers and the compounds, we had a filter paper to put on top of the beakers when we were completing the experiment. The mass of the filter paper was .8522g. After completing the experiment, by boiling the water in the beakers, we had to collect some data from our products as well. We gathered the mass of beaker A along with the compound, and the filter paper, which was 50.9056g. then to find the mass recovered in beaker A, you had to take the mass of baker A with compound, subtract the mass of the empty beaker, then subtract the mass of the clean filter paper to get a mass of 39.3199g. That is the mass of the compound recovered. We then got the mass of beaker B with the compound, and got 61.1456g. We then took the mass of beaker B + the compound, subtracted the mass of empty beaker B, following that step, we subtracted the mass of the filter paper to get a mass of 49.5599g. That is the mass of the compound recovered. After completing those first few steps to gather the data, we had to find the total mass of compounds before the reaction, which in that case, we had to add both masses of compounds placed in the empty beakers. we got a total mass of 1.9506g. we then did the same with the total mass of compounds after the reaction. we got a total mass of 88.8798g. We did have some problems as the experiment went on. After gathering the data of the empty beakers,we compared some of our numbers with other groups throughout the class, and our numbers seemed a tad bit low. That being said, the scale could have been zeroed before already before put the beaker onto the scale, or we didn't zero the scale before gathering the mass of the empty beakers. Which then, would mess up our mass of compounds recovered after the reaction, and it threw off the total mass of compounds after the reaction as well. The class average mass after the reaction was 2.7g. Our percent error for the lab was 3191%

Based on how big the step was, the shoe, and height, the criminal of the case was Penelope.