The Effect of Water Temperature on Alka-Seltzer Background Information: Alka Seltzer, a form of aspirin in tablets, fizzes in water due to the bicarbonate and hydrogen reacting, creating carbon dioxide to create fizzy water. It is made of aspirin, citric acid, and sodium bicarbonate. Alka Seltzer does not occur in nature, and can be purchased at pharmacies around the world. Alka Seltzer claims to relieve minor pain, heartburn, and headaches. ExD: Hypothesis: If the temperature is increased, then the Alka Seltzer will bubble longer. Independent Variable: Temperature of water Dependent Variable: Rate of chemical reaction Control Group: Room temperature water (25°C) Experimental Constants: beaker size, water amount, tablet size, outside room temperature …show more content…
Get 4 beakers and put 250 mL of water in each 2. Put a few ice cubes in one beaker of water and wait until it is 16 °C to remove them 3. Drop tablet of Alka-Seltzer into the cold beaker of water and time length of reaction with a stopwatch 4. Pour hot water into one beaker and adjust the temperature to 39°C by adding colder water if needed 5. Remove the excess water to maintain 250 mL of water if needed 6. Drop one tablet in the beaker and time how long it takes to fully dissolve 7. Repeat steps 4-6, but with the water heated to 48°C 8. Repeat step six with room temperature water Results Water at 16°C took the longest to dissolve the tablet at 72.88 seconds. The room temperature water (at 25°C) took 37.18 seconds. The water at 39°C dissolved in 19.4 seconds. Finally, the water at 48°C dissolved in 20.28 seconds. Analysis In the beginning we set out to find out if water temperature has an effect on the length of the reaction of water and Alka Seltzer. In our results we found a negative correlation in the relation of the length of the reaction and the temperature of the water. The bubbles appeared to be the same amount, but came out faster in the hotter water. The results support my hypothesis to a limit, due to a suspected error whilst timing the reaction at 48°C, as it was cut off short. Otherwise, I believe that the reaction at 48°C would have ended sooner than the 39°C
Use a stopwatch or timer to determine the amount of time it takes for the tablet to completely stop fizzing out or until it completely stops dissolving.
First, 100 mL of regular deionized water was measured using a 100 mL graduated cylinder. This water was then poured into the styrofoam cup that will be used to gather the hot water later. The water level was then marked using a pen on the inside of the cup. The water was then dumped out, and the cup was dried. Next, 100 mL of regular deionized water was measured using a 100 mL graduated cylinder, and the fish tank thermometer was placed in the water. Once the temperature was stabilizing in the graduated cylinder, the marked styrofoam cup was filled to the mark with hot water. Quickly, the temperature of the regular water was recorded immediately before it was poured into the styrofoam cup. The regular/hot water was mixed for a couple seconds, and the fish tank thermometer was then submerged into the water. After approximately 30 seconds, the temperature of the mixture leveled out, and was recorded. This was repeated three
1. Decide on a range of temperatures from 5 °C to 35 °C to be tested.
My Science fair topic is on Alka-Seltzer Tablets and its reaction time based on its particle sizes.
In order to better understand this experiment, one must first have a clear understanding of several underlying concepts. First, one must be aware of the ingredients and properties of Gatorade. Secondly, one must understand what an electrolyte is and its biological significance. Thirdly, one must be familiar with the general idea of conductivity. Finally, one must understand how freezing a substance affects its properties at a molecular level. Once a basic understanding of the aforementioned concepts is obtained one will be able to adequately conduct the experiment and
§ Pour water from the kettle into the beaker until it is half full and
When Alka-Seltzer comes in contact with water, a chemical reaction immediately occurs that releases carbon dioxide gas. This reaction creates a lot of bubbles and fizz like a soda, and like a soda, the bubbles are carbon dioxide gas (CO2).
1Fill one of the glass with very hot water. Add a drop of red food
Repeat this process for cup #4. Now place cups #2 and #4 in a secure position where they are not affected by the heat lamp. After that, place cups #1 and #3 under the heat lamp with about 10 cm of space between the lamp and the cups-the heat lamp should remain off for the time being. Once the samples are situated, turn on the LabQuests and attach two temperature sensors to each LabQuest, every partner should be assigned a temperature sensor and a cup. When everyone is ready, they should begin gently stirring the contents of their assigned cup with their temperature sensor, the whole group should try to start stirring at the same time. Continue to stir at a constant rate for the rest of the experiment. The green arrow on the screen of both LabQuests needs to be clicked in order to begin recording data, the heat lamp should be turned on at this point. Carry on measuring the temperature of all four samples until the ice in cup #2 melts completely and the temperature has warmed to a few degrees above 0° C. Once this has happened stop recording data on both LabQuests by clicking the red square on the screen. After this is done turn off the heat lamp and double click on the graph title on the screens of both LabQuests to add a descriptive title to the
In undertaking the experiment, the hypothesis “if the number of Alka Seltzer tablets reacted increases, then the maximum rate of reaction will increase,” was formed. When graphing the relationship between the maximum rate of reaction and the number of Alka Seltzer tablets reacting, Graph 7 produced a line of best fit with a constant increasing slope that passed through the origin (0,0). This is characteristic of linear graphs, which have the general equation, y=mx, where m is the slope, a constant term, and y and x are changing variables that are directly proportional (i.e. y ∝x). Hence, it can be deduced that Graph 7 is a linear graph, and that there is a linear relationship between the maximum rate of reaction and the number of Alka Seltzer tablets, where they are directly proportional. That is, as the number of Alka Seltzer tablets increased, the maximum rate of reaction increased, supporting the hypothesis. As the true value of the maximum rate of reaction per Alka Seltzer tablet was not known, and a value for comparison was unavailable, the accuracy of the results could not be determined. However, due to the scatter in Graphs 2 to 7, it was evident that the results had low precision. In future, repeating the experiment using different and/or new apparatus will aid in detecting systematic errors and improve the accuracy and validity of the results.
5.) One at a time, place your test tubes in the water bath and heat the first test tube to 25 , the second to 50 , the third to 75, and the last to 100 degrees c. Remeber to stir with your stirring rod every so often.
In a 250ml beaker place 100mls of water, measure the temperature of the water and record this initial temperature onto a table. Set the timer and add one teaspoon of Ammonium Nitrate to the water, stir this continuously until the Ammonium Nitrate has dissolved. After 1 minute measure the temperature and record it, do this for a further 2 minutes (3 minutes in total). Repeat this process for a total of 10 teaspoons.
Methodology: A plastic cup was filled half way with crushed ice and mixed with four spoonfuls of 5 mL of sodium chloride. A thermometer was quickly placed inside the cup to take the temperature and the
The three variables that are to be investigated in this particular experiment are temperature, concentration and a
Since I used water at 3 different temperatures, I formed 3 hypotheses. If I stir the sugar in the cold water, then it will take 45 seconds to dissolve. If I stir the sugar in the room temperature water, then it will take 25 seconds to dissolve. If I stir the sugar in the hot water, then it will take 15 seconds to dissolve.