Alka Seltzer Experiment

The Dependent variable for this study is the amount of water absorbed by the paper towels. This will be measured in milliliters. The independent variable for this study is different brands of paper towels. The controlled variables will be the amount of water the paper towels are given to absorb, the size of the paper towels at the beginning of the experiment, and using the same measuring instruments in each trial. I will reduce the threat to internal validity by conducting the experiments in the

Purpose: The purpose of this experiment is to observe chemical changes in common consumer products to determine if the chemicals are basic, acidic, or remain neutral when mixed with other chemicals.

In this lab we tested how changing the content of the water affects the speed of the alka seltzer dissolving. My hypothesis was that the tap water would dissolve the tablet fastest, the salt water would be second fastest, and the sugar water would be the slowest. I was correct that the tap water would dissolve the fastest, but I was wrong in that the salt water would dissolve faster than the sugar water. I think that our results came out the way they did because of the amount of sugar and salt we put into the water. When we put the sugar and salt into the beakers, we came up with those measurements on the spot. After the salt and sugar had been added, the salt water was very cloudy, but you could barely tell the tap water from the sugar water.

Introduction: Alka-seltzer contains three active ingredients, aspirin, sodium hydrogen carbonate and citric acid. It is used for headaches, migraines, and cold and flu symptoms. Alka-Seltzer is usually taken when dissolved in a glass of water. When placed in water a series of chemical reactions result into Sodium citrate and Sodium acetylsalicylate. The sodium citrate would act as the antacid for stomach pains, and the sodium acetylsalicylate would act as the pain reliever.

The independent variable for the experiment was the paper towels. The dependent variable was the absorbency and strength. The constants for the experiment were the size of the paper towels that were used, the amount of water, the size of the beaker, the size of the cylinder and the amount of the weight.

Since Alka Seltzer is swallowed and reacts with stomach acid, the vinegar is in this experiment is substituting as the stomach acid. The principle of limiting reagents relates to this lab because

An Alka Seltzer is a white, solid, odorless tablet that is used in our daily life. For the most part it is mainly used for temporary relief on heart burns, acid indigestion, upset stomachs, headaches and pain in general. The purpose of the lab conducted was to show the fastest way on can dissolve an alka seltzer tablet using different liquids. The liquids used were regular tap water, Sprite and Minute-Maid Apple Juice. So, if we use different types of liquids to see which will dissolve the alka seltzer the fastest, then out of the three liquids water will take the least amount of time to fully dissolve the tablet because it is the most recommended liquid to take with any

· I set up the apparatus as shown in the diagram. I then placed a

The independent variable is the water. The types of water we’re using our sink water, tub water, refrigerator water, and salt water. We are using these types of water because those are the types of water we have access to other water.

To start this experiment you would would get the petri dish and put a cross on it then in one quadrant you put a C (control) then you would number the other quadrants

Three test tubes were labeled accordingly: Tums, AS for Alka-Seltzer, and Water as the control. A pipette was used to transfer 5ml of each solution to the appropriately labeled test tube. Four drops of Bromocresol Purple were added to each test tube and flipped upside down while covered to fully mix into the solution. 0.1 M of HCl was added a drop at a time in to the Tums solution and then flipped upside down after every drop to mix, until the solution was no longer purple. This procedure was repeated for the two other test tubes and the number of drops was recorded. Six groups of students performed the experiment and the number of drops of HCl used for each solution was

Subjects performed an experiment to investigate the effects of fluid ingestion on kidney function, in which they measured with the kidney output. Before beginning the experiment, each subject was to take a sample collection and that was Sample 1. Once returned to class, the subjects recorded the time of urination and began to do the investigation. In order to begin the investigation, subjects drank one of the four fluids, and measured the effect it had on the urine output. The four fluids were bottled water, Gatorade, salt water, and black coffee. While preparing for the experiment, the contents of each of the solutions was investigated and written down to test what the solution could do to the balances in the body. Subjects figured out the

The dependent variable is the four types of drinks we using to test. (Grape Juice, Coffee, Tea, and Coca-cola)

Dependent Variable: The dependent variable in this investigation is the temperature of the coffee in the smallest beaker. Controlled Variables: Room Temperature: The room temperature will be a consideration in the trials. However, this variable is not significant for this specific investigation.

  The independent variable for our experiment was the amount of baking soda.  This is true because we changed the amount of the baking soda from 1 gram in the first trial to 3 grams in the second.   The dependent variable was the number of spinach chad's that floated to the top per minute.