The chances of this happening are better when the tablet is crushed into more pieces since the molecules have more opportunities to collide and when the temperature is higher, since the molecules are moving faster. In this activity, students will experiment with the reaction between Alka Seltzer tablets and water in different conditions.
By changing temperature and the surface area available for reaction, students will begin to see what factors chemical engineers can control to get the desired result. This activity introduces the reaction used for the Alka Seltzer Rockets activity, so it is typically performed before building rockets to understand the nature of the reaction before using it.
Before the experiment, ask students to hypothesize what will make the reaction go the fastest and what makes them think that. This can be anything, but try to seek answers with specific regard to the variables being changed in this activity. At the end, collect and present all class data on the board. Highlight discrepancies and the general trend. As the tablets dissolve, the sodium bicarbonate splits apart to form sodium and bicarbonate ions.
The bicarbonate ions react with hydrogen ions from the citric acid 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. Can you guess whether fast-moving molecules or slow-moving ones will speed the reaction time?
Add cold tap water to about an inch from the rim. Stir the ice cubes in the jar for about a minute so that the temperature evens out. Right before you start the activity use a spoon to remove the cubes. Be careful when handling the hot water. Time how long it takes for the tablet to disappear. You may want to have a helper time the reaction.
How long does it take the tablet to disappear? How vigorous are the bubbles? How do Pop Rocks candy work? Why does hydrogen peroxide foam when you put it on a cut?
Cite This! Try Our Sudoku Puzzles! More Awesome Stuff. After the Alka- Seltzer tablet dissolved completely, the time was taken and recorded. The Alka-Seltzer tablet was dissolved in three different liquids Sprite, water, or vinegar; the results showed that the Alka-Seltzer tablet dissolved the fastest in water and the slowest in Sprite. As an Alka-Seltzer tablet dissolves in water, it liberates carbon dioxide.
The carbon dioxide dissolves in the water and then comes out of solution as a gas. This carbon dioxide gas has mass, but since it is a gas it escapes from the container and diffuses into the atmosphere. Alka-Seltzer Anti-Gas is used to relieve painful pressure caused by excess gas in the stomach and intestines. This medicine is for use in babies, children, and adults.
Calcium carbonate Alka-2, Chooz, Tums and others relieves heartburn, but also often causes constipation and acid rebound, which is an increase in the production of stomach acid after the antacid effect has worn off. The medicines of alka-seltzer are in the water. Fully dissolve 2 tablets in 4 ounces of water before taking. Adults and children 12 years and over, 2 tablets every 4 hours, or as directed by a doctor. The baking powder reacts with water to produce bubbles, while baking soda does not react with water.
This medicine may raise the chance of severe and sometimes deadly stomach or bowel problems like ulcers or bleeding. The risk is greater in older people, and in people who have had stomach or bowel ulcers or bleeding before. When too much acid builds up in your stomach, you can get heartburn.
This demonstration, using bromphenol blue and vinegar, will show how Alka-Seltzer neutralizes stomach acid. 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.
0コメント