Honors ProjectHonors Project

By: Selena G. LugoBy: Selena G. Lugo

TEMPERATURE EFFECTS TEMPERATURE EFFECTS ON REACTION TIMEON REACTION TIME

TEMPERATURE EFFECTS ON REACTION TEMPERATURE EFFECTS ON REACTION TIMETIME

• In this experiment I have used Alka-Seltzer tablets to test temperature effects on reaction time.

• The main ingredients in a tablet of Alka-Seltzer are

• Aspirin

• Citric Acid

• Sodium Bicarbonate (NaHCO3)

• Sodium Bicarbonate dissolves in water and splits apart into Sodium(Na+) & Bicarbonate (HCO3-) ions.

• The bicarbonate reacts with hydrogen ions (H+) in the citric acid which together form carbon dioxide and water.

• Material Needed:

• 12 Alka-Seltzer Tablets

• Thermometer

• 300 ml beaker

• 1,000ml beaker ( use as Measuring cup)

• Masking Tape

• Hot & Cold Tap Water

• Ice

• Stopwatch

• Student Helper

• Notebook & Pencil

• Hot plate

• Stirring rod

TEMPERATURE EFFECTS ON REACTION TEMPERATURE EFFECTS ON REACTION TIMETIME

TEMPERATURE EFFECTS ON REACTION TEMPERATURE EFFECTS ON REACTION TIMETIME

TEMPERATURE EFFECTS ON REACTION TEMPERATURE EFFECTS ON REACTION TIMETIME

TEMPERATURE EFFECTS ON REACTION TEMPERATURE EFFECTS ON REACTION TIMETIME

TEMPERATURE EFFECTS ON REACTION TEMPERATURE EFFECTS ON REACTION TIMETIME

TrialsTrials 11 22 33 44

Cold Water(22 degrees Celsius)

59” 88 1’00”27 1’05”54 1’02”22

Ice Cold Water (7 degrees Celsius)

2’13”62 2’36”60 2’23”65 2’38”50

Hot Water (65 degrees Celsius)

25”52 25”79 20”93 24”33

TEMPERATURE EFFECTS ON REACTION TEMPERATURE EFFECTS ON REACTION TIMETIME

TEMPERATURE EFFECTS ON REACTION TEMPERATURE EFFECTS ON REACTION TIMETIME

• This experiment showed that in fact temperature does affect This experiment showed that in fact temperature does affect reaction reaction time. As you can see in the chart above the cold water time. As you can see in the chart above the cold water had a regular had a regular

reaction. On the other hand the ice cold water had reaction. On the other hand the ice cold water had a very slow reaction a very slow reaction while the hot water had a reaction in while the hot water had a reaction in seconds. This tells us that the seconds. This tells us that the

molecules in ice cold water do not molecules in ice cold water do not provide the enough needed energy to provide the enough needed energy to produce a fast reaction suchproduce a fast reaction such as the hot water did. as the hot water did.

TEMPERATURE EFFECTS ON REACTION TEMPERATURE EFFECTS ON REACTION TIMETIME

• Cold tap water

TEMPERATURE EFFECTS ON REACTION TIME

• Ice Cold Ice Cold tap watertap water

TEMPERATURE EFFECTS ON REACTION TEMPERATURE EFFECTS ON REACTION TIMETIME

• HotHot tap water tap water