The effect o temperature on a Reaction time
Abstract:
This project looks at how the temperature of an experiment can affect its reaction time. The purpose of this experiment is to determine if dissolving reactions are affected by waters temperature. I believe that if the H2O temperature increases, then the Alka-Seltzer tablet will dissolve faster because the hot water molecules will move faster colliding with the tablet particles. Water will be the independent variable due to the fact is will always stay in its same form throughout the experiment. The Manipulated variable will also be the water, since I will be changing its temperature. The Responding the variable will be the timing of how fast or slow the Alka-Seltzer tablet dissolves. And the control is the glass of water that is set at cold tap water.
The project will involve the testing of three different water temperatures. One at hot tap water, one at cold tap water, and ice water. 1 cup of water at each temperature will be poured into the same glass, and have its temperature recorded. After doing so each water temperature will go through five trials with one Alka-Seltzer tablet being dropped into the glass each time, recording how long it takes for the tablet to dissolve.
After testing my hypothesis, my results were proven right. When comparing how the Alka-Seltzer tablet dissolved in the hot temperature water and how it dissolved in the cold temperature water. It showed that the hotter the temperature of the H2O was the faster the Alka-Seltzer tablet dissolved.
Materials and Equipment:
Alka-Seltzer tablets (at least 12; if you plan to do additional variations to the project, you will want to get a larger box)
Thermometer with a range of at least 0°C to 60°C
Clear drinking glass or jar (12 ounce [355 mL] or larger)
Graduated cylinder, 100 mL. A 100 mL graduated cylinder
Masking tape
Something to stir with, such as a spoon or a chopstick
Hot and cold tap water
Ice
Stopwatch or a clock or watch with a second
This project looks at how the temperature of an experiment can affect its reaction time. The purpose of this experiment is to determine if dissolving reactions are affected by waters temperature. I believe that if the H2O temperature increases, then the Alka-Seltzer tablet will dissolve faster because the hot water molecules will move faster colliding with the tablet particles. Water will be the independent variable due to the fact is will always stay in its same form throughout the experiment. The Manipulated variable will also be the water, since I will be changing its temperature. The Responding the variable will be the timing of how fast or slow the Alka-Seltzer tablet dissolves. And the control is the glass of water that is set at cold tap water.
The project will involve the testing of three different water temperatures. One at hot tap water, one at cold tap water, and ice water. 1 cup of water at each temperature will be poured into the same glass, and have its temperature recorded. After doing so each water temperature will go through five trials with one Alka-Seltzer tablet being dropped into the glass each time, recording how long it takes for the tablet to dissolve.
After testing my hypothesis, my results were proven right. When comparing how the Alka-Seltzer tablet dissolved in the hot temperature water and how it dissolved in the cold temperature water. It showed that the hotter the temperature of the H2O was the faster the Alka-Seltzer tablet dissolved.
Materials and Equipment:
Alka-Seltzer tablets (at least 12; if you plan to do additional variations to the project, you will want to get a larger box)
Thermometer with a range of at least 0°C to 60°C
Clear drinking glass or jar (12 ounce [355 mL] or larger)
Graduated cylinder, 100 mL. A 100 mL graduated cylinder
Masking tape
Something to stir with, such as a spoon or a chopstick
Hot and cold tap water
Ice
Stopwatch or a clock or watch with a second