This is what the bubbles are. Some factors can change how quickly the carbon dioxide gas is made, and consequently affect how furiously the tablet fizzes. Alka-Seltzer is a medical drug that works as a pain reliever and an antacid antacids help neutralize stomach acidity, such as heartburn. The pain reliever used is aspirin and the antacid used is baking soda, or sodium bicarbonate. Why is this? As the tablets dissolve, the sodium bicarbonate splits apart to form sodium and bicarbonate ions.
The bicarbonate ions react with hydrogen ions from citric acid, another ingredient in the tablets to form carbon dioxide gas and water. This is how the bubbles are made.
How is temperature related to this reaction? For the reaction to occur, the bicarbonate ions must come into contact with the hydrogen ions in just the right way. The probability of the bicarbonate and hydrogen ions doing this is affected by temperature: the higher the temperature, the faster the molecules move; the lower the temperature, the slower they move.
The temperature of a solution is a measure of the average motion and energy of the molecules in the solution. Extra: Test Alka-Seltzer tablets in a wider range of temperatures, and then graph the time it takes a tablet to dissolve in water at each temperature check with a thermometer.
What temperature change is required to increase the reaction time by a factor of two? What about decreasing the reaction time by a factor of two? If there is a greater surface area i. Extra : You could turn this activity into a homemade lava lamp! To do this, you will want to use a tall jar or empty clear plastic 1-liter or 2-liter bottle, fill it with about 2 inches of water, add 5 drops of food coloring, and then fill it at least three-quarters full with vegetable oil.
You could repeat this activity using your homemade lava lamp at a cold and hot temperature. You will also want to use one-quarter of an Alka-Seltzer tablet at a time instead of a whole tablet.
How does the bicarbonate reaction look in the homemade lava lamp? Did the Alka-Seltzer tablet dissolve much faster in the hot jar compared to the cold one? Were there a lot more bubbles produced initially in the hot water compared to in the cold water?
When the Alka-Seltzer tablet was added to the hot water, the tablet should have quickly dissolved, taking around 20 to 30 seconds to do so, depending on the exact temperature.
In the hot water, the tablet should have more vigorously produced bubbles than in the cold water. This is how the bubbles are made. If you look at the ingredients for Alka-Seltzer, you will find that it contains citric acid and sodium bicarbonate baking soda. When you drop the tablet in water, the acid and the baking soda react — this produces the fizz. Is Alka-Seltzer the same as baking soda? Not exactly. Baking soda sodium bicarbonate does not contain anhydrous citric acid, the main active ingredient in Alka-Seltzer effervescent tablets that relieve heartburn and acid indigestion.
If you ever make bath bombs like us, you already have the ingredients on hand! Simple mix 2 parts baking soda with 1 part citric acid. Add a teaspoon of the mixture and watch the reaction go! Do not take 2 doses at the same time or extra doses. Many times Alka-Seltzer aspirin, citric acid, and sodium bicarbonate is taken on an as needed basis.
Do not take more often than told by the doctor. Do not take Alka-Seltzer for more than 3 days in a row. If symptoms persist, speak to your doctor or pharmacist. Again time how long it takes the tablet to disappear. How long does it take the tablet to disappear in the colder water? What temperature change is required to increase the reaction time by a factor of two make it as twice as fast?
What about decreasing the reaction time by a factor of two? If there is a greater surface area that is, a tablet is broken up into more pieces to expose more surface , does the same amount of tablet result in the reaction happening faster or slower? To do this, you will use an empty container, such as a tall jar or clear plastic one- or two-liter bottle.
Fill it with about two inches of water, add five drops of food coloring and then fill it at least three quarters full with vegetable oil before adding one quarter of an Alka-Seltzer tablet. You could repeat this activity using your homemade lava lamp at colder and warmer temperatures. Because it contains oil, you should have an adult help you devise a safe way to warm or cool the contents of each container. How does the bicarbonate reaction look in the homemade lava lamp?
Observations and results Did the Alka-Seltzer tablet dissolve much faster in the hot water compared to the cold? Were there a lot more bubbles produced initially in the hot compared with the cold water? After the Alka-Seltzer tablet was added to the hot water the tablet should have quickly dissolved, taking some 20 to 30 seconds to do so, depending on the exact temperature. After the tablet was added to the ice-cold water it should have taken much longer to dissolve, with most of the tablet disappearing after about two to three minutes, but with some bubbles still apparent after six minutes or longer.
In the hot water the tablet should have more vigorously produced bubbles than in the cold water. The higher the temperature, the faster the molecules move—and the more likely it is that the bicarbonate will contact hydrogen in just the right way for the chemical reaction to occur and produce carbon dioxide bubbles.
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