Skip to content. June 19, June 23, Sid M. Fill the beaker with water up to the mL mark with cold water and stir the ice water until the temperature equilibrates. Measure the temperature of the water and record it in the table. Add a tablet and record the time it takes for the tablet to react. Repeat with room temperature water, then with hot water heated to 70 degrees C using a hot plate. The Effect of Surface Area on Rate of Reaction Prepare three different sizes of the Alka Seltzer tablets: A whole tablet A tablet broken into quarters A tablet ground into powder: Place the tablet it a piece of weighing paper wax or parchment paper work as well and break it either with your hands or crush it using the back of a metal spoon.
Add mL of water to a large beaker. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe. Science Questions. 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?
Again time how long it takes the tablet to disappear. How long does it take the tablet to disappear in the colder water? What temperature change is required to increase the reaction time by a factor of two make it as twice as fast? What about decreasing the reaction time by a factor of two? If there is a greater surface area that is, a tablet is broken up into more pieces to expose more surface , does the same amount of tablet result in the reaction happening faster or slower?
Aspirin tablets fizz when put into water. This is the result of two chemicals undergoing a chemical reaction. The chemicals are sodium bicarbonate which is actually baking soda and citric acid acid found in fruit. The combination of these two chemicals produces a gas known as carbon dioxide. When gas is produce it will expand and fill the shape of its container.
When the chemicals are placed into warm water they react a lot faster then when placed into cold water. This is because an increase in temperature increases the dissolving of the chemicals reacting and speeds up their reaction.
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