Alka-Seltzer+Class+Experiment+Workspace

Class Experiment Page (Andrew Blank)

We will beat the other classes! Don't go overboard on sabotage, though. Please post your group's control variable, procedure, and (eventually) your results. Also, group members and leader.

ALL GROUPS SHOULD... (unless one of the below is your control variable)
 * use 1/2 tablet
 * 100mL beaker
 * 15mL TAP water
 * only turn the cold water handle
 * time from when the tablet hits the water until when the tablet is no longer visible as a solid

If your answer is "procedure will be added," then please try to work as a group to determine a general idea at the very least of what you will be doing. We don't have a ton of time to compile results, so efficiency will be really important.

Group Three: Control Variable: Water Temperature Procedure: We will test three seperate water temperatures: one sample will be straight from the cold water side of the faucet, one sample will be cooled in an ice bath, and the third will be heated up on a hot plate to somewhat below boiling. We will drop the tablet into the 100 mL beaker filled with 15 mL of one of the three temperatures of water. We will time it from the instant it touches the water to the instant it is no longer any part solid. Conclusion: The tablet dissolves the fastest in hot water, and should be ingested with such if one wants tablet dissolution in the minimum time. Group Rep: Ross Group Members: Tommy, Matthew B., Edward, and Dylan

Group Four: Control Variable: Amount of Water Procedure: We will test how long it takes the tablet to dissolve in three different amounts of water: 15mL, 30mL, 45mL. We will then record the time it takes the tablets to dissolve in each of the beakers of water. We will conduct four trials for each of the amounts of water. We will time it from the instant it touches the water to the instant it is no longer any part solid. Conclusion: The tablet should be put in a glass with enough water to fully submerge the tablet Group Rep: Daniel Memebers: Daniel, Jonny, Alex, Nolan, Shoshi

Group Five: Control Variable: Tablet Temperature Procedure: We will test four separate groups of tablets: one group will be heated, one put in the freezer, one refridgerated, and one left at room temperature. We will drop the tablet into an 100 mL beaker filled with 15 mL of water. We will time it from the instant it touches the water to the instant it is no longer any part solid. Conclusion: The tablet should be heated to around 41.7 degrees Celcius to ensure for quickest results. Group Representative: Kimberly Group members: Arin, Jeremy, Kevin, Kim.

Group Six: Control Variable: Order of Combination Procedure: We will test two different combinations: placing the tablet in the beaker followed by water and pouring the water in the beaker followed by the tablet. We will use use a 100mL beaker and 15mL of water. We will time it from the instant it touches the water to the instant it is not longer any part solid. Group Rep.: Natalie Group Members: Courtney, Nadia, Josh, Natalie Conclusion: When the tablet is dropped into the water, it dissolves faster.

Group One: Control Variable: Surface Area Procedure: We will test two different surface area to mass ratios. In the first, the tablet (already halved) will cut in half again so that the surface area is increased. In the second, the half-tablet will be pulverized in a plastic baggie thereby increasing the surface area more drastically. Group Rep: Marielle... Group Members: Matt, Kathryn, Jeremy, and Marielle Conclusion: When the tablet is pulverized, it dissolves in nearly half the time it takes for the control tablet to dissolve. The user would benefit from breaking the tablet into very small pieces before dissolving it in the water if he/she wanted the fasted time.

Group Two: Control Variable: Type of Liquid We will use four different liquids: lemon juice, distilled water, carbonated water, and tap water. We will put 15 mL of each liquid in a 100 mL beaker and drop the half tablet into it. We will time how long it takes the half tablet to dissolve with a stopwatch. Repeat with each liquid. Group Rep: Matthew K. Group Members: Ethan, Sam, Joseph, Andrew Conclusion: The tablet dissolves fastest in carbonated water. The user should dissolve the tablet in carbonated water.