Kat Robinson, Conor Zoebelein, and Melissa Jenck M 2-2:50, R 11-12:50, F 12-1:50

NaHCO 3 (s)+HCl(l)+H 2 O(l)→NaCl(l)+2H 2 O(l)+CO 2 (g) Calculations and Theoretical Values: = 0.11 moles CO 2 = g NaHCO 3 = 9.76 mL HCl 4.5 atm pressure, g NaHCO 3, 9.76 mL HCl 4.5 atm0.65 L1 K1 mole CO 2 1 atm L293 K moles CO 2 1 mole NaHCO 3 84 g NaHCO 3 1 mole CO 2 1 mole NaHCO moles CO 2 1 mole HCl1 L1000 mL 1 mole CO moles HCl1 L

The bottle pushed into a wall to propel the car forward (blue arrows) Brackets helped keep the bottle stable(red arrows) Two sticks kept the top of the bottle from being turned when opened (yellow arrow)

The car ran on hydrochloric acid, baking soda, and water. In the Thursday lab group, we placed 3 rd and moved on to the finals. We did not place in the finals. One of the issues we faced involved too much pressure, making the car lose control and flip over. Another problem came from the car turning to the left or right. Reducing the amount of acid and baking soda kept the car from flipping. As for a straight path, we could have been more careful when opening the bottle, or simply redesigned the car to add stability. The car went relatively straight before the actual competition, so we didn’t think a redesign would be necessary. However, during the actual competition it became more clear that a better design would have improved our consistency.