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Sara, Rachel, and Avery’s Awesome Reaction Car

Sara, Rachel, and Avery’s Awesome Reaction Car. Reaction Chemistry. CaCO 3 (aq)+2HCl(l) CO 2 (g)+H 2 O(l)+CaCl 2 (aq) (x mol CO 2 )=[3.5atm(0.500L)]/[(0.08205 L-atm/mol-K)(293K)]=0.072293 mol CO 2 Need 0.072293 mol of CaCO 3 and 0.14559mol HCl 0.14559 mol HCl * 12.1M = 12 mL HCl

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Sara, Rachel, and Avery’s Awesome Reaction Car

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  1. Sara, Rachel, and Avery’s Awesome Reaction Car

  2. Reaction Chemistry • CaCO3(aq)+2HCl(l) CO2(g)+H2O(l)+CaCl2(aq) • (x mol CO2)=[3.5atm(0.500L)]/[(0.08205 L-atm/mol-K)(293K)]=0.072293 mol CO2 • Need 0.072293 mol of CaCO3 and 0.14559mol HCl • 0.14559 mol HCl * 12.1M = 12 mL HCl • 0.072293 mol CaCO3 * 100.0887g/mol CaCO3 = 7.2858g CaCO3 • We also attempted using SAP crystals to eliminate spew. The SAP crystals expanded and blocked the cap opening. This prevented gas from escaping and did not suck up all the liquid. Thus the SAP was a failure.

  3. Car Design • We went with simplicity when designing our car • The bow was added because it was Civil War week and we wanted our car to be Powered by Orange!

  4. Data Collected

  5. Conclusion • On race day, the performance of our car was inconsistent • Initially the car flipped or went out of bounds • To fix this we used zip ties to keep the bottleneck in place • After that it went straight but the distance varied greatly due to the front wheels locking • We fixed this by taking off some of the K’nex so the wheels could be free spinning • This led to the car going way too far but the stopping point was based solely on the reaction • If we would had more time then we could have found the right amount of reactants needed to travel 25ft exactly

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