state lab 24
... mass. 6. Record data. 7. Fill a 1000 mL beaker with water 8. Place the glass funnel in the beaker, upside down. 9. Fill the eudiometer tube to 50 mL. 10. Place a finger on the end of it and turn it upside down onto the skinny end of the funnel. 11. Record the amount of water you have left in the tube after it is inverted (some water may have been lost). 12. Record the temperature of the water. 13. Your partner should then tip the eudiometer and glass funnel enough for you to place the alka-seltzer tablet under the funnel and let it drop over the tablet. 14. Water level of eudiometer should drop. This change represents how much gas the tablet gave off. 15. When all bubbling has stopped, measure the new height of the water in the eudiometer. 16. Record data. 17. Clean out everything used and start the experiment again to check for accuracy. 18. When entirely finished, clean up materials and lab station. Conclusions: Judging by our data, I would conclude that dissolving an entire tablet of alka-seltzer would produce 20 mL of gas. I simply multiplied the change of water level (5) times 4, the total amount of quarters of alka-seltzer. Comments: Both times this experiment was performed, about 5 mL of gas was produced. Because time was cut short for the second time around, perhaps the water level did...