Alka-Seltzer has been on the market since 1931 and has helped to relieve indigestion and upset stomach. The tablets began to fizz and bubble when dropped into water. “The fizziness happens when baking soda (sodium bicarbonate) and citric acid react chemically in water. They yield sodium citrate, water and carbon dioxide gas, which causes bubbles.” Based on this information, we will measure the reaction time of AlKa- Seltzer dissolved in 200 ml of water at 3 different tempertures in the first portion of this experiment. In the second portion of this experiment we will keep the temperature constant and divide the ½ tablet of Alka- Seltzer into 2 pieces ,3 pieces and an unbroken ½ tablet. It is my belief that Alka-Seltzer
The procedure for this lab is fairly simple. First fill up an erlenmeyer flask with 50 mL of warm tap water, then put it on a hot plate and bring it to a boil. Inside a tray to catch any spills set up a ring stand about 6 inches high. After the water has started to boil remove it from the hot plate and let it cool slightly by setting it on the lab table, after about a minute place the rubber stopper in the flask and carefully flip the flask over and place it in the ring stand. Rub an ice cube on the top of the flask and watch it boil. Then clean up the lab when you are
To investigate and compare how different temperature (5℃, 15℃, 25℃, 35℃, 45℃) can affect the concentration of carbon dioxide in soda water through titration with sodium hydroxide solution.
This is an investigation to determine the relation between temperature of a solution (sucrose) and the rate of osmosis
The equipment used for this lab were: Vernier caliper, Rigid sphere, thermistor sensor, absolute pressure sensor, 4 buckets, water and ice.
During the cooler seasons, Virginia gets very cold and thus, the people living in Virginia also get cold. The colder temperatures, not only in Virginia, are the reason for the existence of hand warmers. The experiment conducted was perused for the sole reason of saving money on these said hand warmers. If having more sodium acetate in the hand warmer lasts longer with the highest temperatures than having less sodium acetate, then one would simply buys the bigger hand warmer. After making sodium acetate, the liquid was placed into pouches, which would go on to be tested for their temperatures over a certain period of time. The pouches would be activated and placed into cups of water and the temperatures of the water would be recorded at intervals.
This research paper is about is there enough carbon dioxide in alka seltzer tablets to inflate a balloon. First, what is carbon dioxide? Carbon dioxide is what plants need to grow, it’s what humans exhale, and it’s a powerful gas. Carbon dioxide is also found in volcanoes like Mauna Loa, a volcano found in Hawaii. Air samples at Mauna Loa are collected every day, four times a day. They use a “Siemens Ultramat three nondispersive infrared gas analyzer with a water vapor freeze trap” to collect levels of carbon dioxide. Can one of these determine the amount of carbon dioxide in alka seltzer tablets? Possibly, but they are not readily available.
an Alka Seltzer tablet? What we were measuring was which type of water will make the tablet dissolve the quickest. Our hypothesis was the salt water would dissolve it the fastest, then the pond the second, and tap would take the longest. The results ended up being that the tap water would dissolve the tablet the fastest, then the pond water, and the the salt last. Our three controls are the amount of salt, the amount of water, and the size of the tablet. One way we could improve the experiment is by doing more trials, the more trials the more accurate the resolutes are. Another way we could improve the experiment is to have more time so we could make sure all the temperatures
The reaction rate changes based on temperature, so if the cold temperature or hot temperature isn’t the same for all of the trials, the reaction time won’t be either. If the temperatures are too similar, like the cold and room temperature in all three trials, there isn’t a constant temperature gap to accurately see the reaction time difference. The temperature difference between the cold, room temperature, and hot water for each beaker should be constant for all trials. The timer could also be a potential error. The time needs to be started and stopped at the same point for all of the tablets, so human error could have occurred. Also, the tablets could pose an error if they aren’t the same size or broken. The tablets used should not be broken, and they should be weighed before each
The purpose and significance of this experiment was to find the specific heat and figure out an identification of an unknown metal. The specific heat was calculated through a given formula. The unknown metal was found through descriptions that matched the unknown metal. The unknown elements would be one of the following: Al, Bi, Cd, Cu, Fe, Pb, Ni, Na, Sn, or Zn. First the specific heat of water was measured, then heat flow was measured using equations. Then, using two coffee cups, observe the temperature increase from the first thermometer in the calorimeter. After it has stopped increasing, record the final temperature. Next, weight a small portion of your unknown sample and record the mass and place it in the water bath for ten minutes and record the temperature. Pour the unknown element into the calorimeter. Monitor the temperature and record it in the data table. Repeat the procedure and record the findings on the data sheet. After all these steps are done, identify the unknown substance by another
Fill the three beaker with water. - Beaker #1 will be filled with ice cold water (4c). - Beaker #2 will be filled with water at a room temperature (20c). - Beaker #3 will be filled with hot water (75c).
In Part B, the calibration of burette was done. Burette can actually transfers water more accurate compare to pipette and micropipette. The burette calibration were done using 5ml, 10ml, 15ml, 20ml and 25ml of water. Each volume of water was repeated three times to obtain a more accurate result. When the experiment is conducted, the mass of the empty Erlenmeyer flask is taken before each trial.
To control this, the water being used will be placed inside a room with a room temperature of 20°C for an hour to allow the temperature of the liquids to drop and remain at that temperature.
Through this experiment, getting the best container to be used is determined. Using a thermometer, this was very conventional. It made getting of results easier rather than feeling the heat with hands. The temperature was written on a paper and the average temperature was known.
Step 2: Measure as much water as you need to make the desired amount of coffee and bring to a boil.