Sodium bicarbonate is, well, basically baking soda. The data chart has 5 rows and 6 columns. They list things such as the amount of water, the way you hold the canister angle you hold it , and the canister you use as the control variables. Preparing for Lesson: Warm Up: Have an Alka Seltzer tablet and a film canister half full of water. Who can do this project? The bicarbonate ions react with hydrogen ions from the citric acid to form carbon dioxide gas and water.
It is recited but not believed. Is reaction rate predictable over a larger temperature range? They advise doctors, nurses, and patients on the correct drug dosage for a patient's weight, age, health, and gender; on interactions between drugs; on side effects; on drug alternatives; on costs; and on ways to give drugs. The second round of experimentation was to find how fast the chemical reaction would create the necessary pressure from the different amounts of Alka-Seltzer. Some factors can change how quickly the carbon dioxide gas is produced, which consequently affect how furiously the tablet fizzes. 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. Remember they only have one column of their data chart filled in for their group and are waiting for the results of the other groups to complete their chart.
That feeling is caused by excess acid in your stomach. 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. Make directional hypotheses that specify what happens to a dependent variable when an independent variable is manipulated. Mixing acids and bases — how does alka-seltzer work? Note: You have to be very quiet during the experiment. Anyone can earn credit-by-exam regardless of age or education level. I address this, and provide examples of student work, in my reflection.
. Wrap Up: None Building Excitement: I build excitement in my students for today's experiment by having them make some predictions. To do this, you will want to use a tall jar or empty clear plastic 1-liter or 2-liter bottle, fill it with 2 to 5 centimeters cm of water, add 5 drops of food coloring, and then fill it at least three-quarters full with vegetable oil. Take the Alka Seltzer tablets and break them into 2 or 3 pieces. The gas soon fills the empty space in the container and just as the students said, pressure builds up. Plop, Plop, Fizz Fast: The Effect of Temperature on Reaction Time www. Before moving on in the lesson progression, stop and discuss with the class their thoughts on conduction after having completed the metal washer and water investigation.
In fact, the molecule holding the key to the relief of an Alka-Seltzer® tablet is the bicarbonate ion. Graphing to Share Results: Students complete their graph to illustrate their data at home for homework. The bicarbonate reacts with hydrogen ions H + from citric acid another ingredient in the tablets to form carbon dioxide gas and water. When the bubbles pop the blobs of colored water fall back to the bottom of the glass. These rockets use a pressurized fuel and an oxidizer.
The pain reliever used is aspirin and the antacid used is baking soda, or sodium bicarbonate. Well, unless you want to turn it into an eruption experiment too. Students are able to tell me the dependent and independent variables easily. Antacids help neutralize stomach acidity, which can cause heartburn. For example, you could record yourself clapping or singing to check if the sensor behaves as expected. First of all, we all know that the most common effervescing tablet used in a film canister rocket is Alka-Seltzer. Data Table Presentation By: Trial Amount of Water ml Temperature °C Tablet Size Reaction Time min:sec 1 100 ml 0.
This lava lamp experiment tops the list! They identify the independent variable as being the different size Alka Seltzer tablets and the dependent variable as being the distance the lid travels. Focus your questions here on tying together heat transfer via conduction and the rate of reaction. Any variable that increases the frequency of these encounters will increase the rate at which products are formed. Endothermic reactions absorb heat energy. The bicarbonate ions react with hydrogen ions from the citric acid to form carbon dioxide gas and water. Invert the canister so that the lid lies flat on the table.
Looking at all the grade settings, I think the concepts were a bit more challenging to convey to the younger groups although they definitely enjoy the launches! Molecules in a solution are in constant motion, and are constantly colliding with one another. Our top priority is student learning. Overall, our rockets blasted off pretty easily with the majority successfully reaching some pretty good heights. This example data from the Science Journal app demonstrates how to measure the reaction time of the Alka-Seltzer tablet dissolving. Purpose: Students will measure the rate of reaction and the temperature change resulting from the endothermic reaction of Alka-Seltzer tablets with water.
Next, fill another cup halfway with water and leave it on the counter to get it to room temperature. Although understanding the chemical change that is occurring in the experiment is not the focus, we do discuss it and it will provide a reference to reflect back on when these standards come up later in the year. This chemical reaction creates many, many bubbles of carbon dioxide gas. Changes in systems may have various causes that may not have equal effects. Each vertical bar would have a length equivalent to 5. They also dispense drugs at pharmacies, according to prescriptions, checking for dangerous drug interactions, and educating patients on how to take drugs, what reactions to watch out for, and how long it should take for drugs to work.