Essay on Lab: Chemical Reaction and Aluminum Foil

Submitted By invuldent
Words: 2511
Pages: 11
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Purpose: This lab experiment is divided into two parts. The first part illustrates the effect of concentration on the rate of reaction. The second part depicts the effect of temperature on the reaction rate. The first experiment will be conducted with procedures already given; this experiment will examine the effect of concentration of distilled water to the rate of reaction of NaOH and HCl solutions and aluminum foil. Meanwhile, the second experiment will require the creation of procedures involving the rate of reaction of Alka-Seltzer in different temperatures of water.
Materials:
Part 1 of 2 – NaOH, HCl, and Aluminum Foil
Saturated NaOH solution
Distilled water
Saturated HCl solution
Forceps
2.5 cm2 Aluminum foil
Disposable pipet
Test tube supports
Test tubes
Timer

Part 2 of 2 – Alka-Seltzer Dissolution in Different Temperatures
LabQuest App
Hot plate
Temperature probe
4 Beakers
4 Pieces of Alka-Seltzer
Ice cubes

Procedure:
Part 1 of 2 - NaOH, HCl, and Aluminum Foil
1.) Tear off a piece of aluminum oil and lay it across the mouth of a large test tube.

2.) Gently press the bottom of another test tube to the aluminum foil, creating a valley-like shape at the mouth of the first test tube (This basin-like depression ensures that the chemical solutions will gently sit on the aluminum foil sheet).
3.) Carefully add 10 drops of NaOH to the aluminum foil and begin the timer when the first drop hits the foil.
4.) When there is a noticeable evidence of a hole in the foil, stop the timer. Another way of knowing that there is a hole is by observing if the chemical solution drips down the test tube. Record the time.
5.) Using forceps, carefully retrieve the aluminum foil and place it to the sink. Wash down the chemical solution with distilled water. Then, wrap the aluminum foil in paper towel and dispose to the appropriate disposable bin.
6.) Repeat Step 1 – Step 5. This time add 8 drops of NaOH and 2 drops of distilled water.
7.) Then, 6 drops of NaOH and 4 distilled water. Follow through again with 4 drops of NaOH and 6 drops of distilled water. Finally, 2 drops of NaOH and 8 drops of distilled water.
8.) Repeat Step 1 – Step 7; instead of conducting the experiment with NaOH, use the HCl solution.
Part 2 of 2 – Alka-Seltzer Dissolution in Different Temperatures
1.) Acquire two 150 mL beakers and two 200 mL beakers.
2.) Fill the four beakers with 50 mL of tap water
3.) Acquire a hot plate and the LabQuest App. Place one beaker to the hot plate and heat the water until you reach 30 C. Use the LabQuest App and the temperature probe to measure the temperature of water. (Note: Heating the water may take a significant amount of time because we are using a hot plate; move on to Step 5 while waiting and go back to Step 4 when the desired temperature is reached).
4.) Once the tap water reaches 30 C, carefully drop one piece of Alka-Seltzer to the beaker and start the timer. When the Alka-Seltzer tablet is fully dissolved, stop the timer and record the time.
5.) Acquire the other beaker with 50 mL of water, and drop a handful of ice cubes. Using a temperature probe, make sure the temperature of the tap water is 15 C.
6.) Once the desired temperature is reached, drop one Alka-Seltzer tablet into the beaker and start the timer. Again, once the tablet is fully dissolved stop the timer and record the time.
7.) Once Step 3 and Step 4 is finished, Grab the third beaker with 50 mL of tap water. Placed the beaker into the hot plate. Heat the water to 40 C using the temperature probe to measure the temperature. (Note: Heating will take a significant amount of time again; move on to Step 9 while waiting).
8.) Once the tap water reaches 40 C, carefully drop one piece of Alka-Seltzer to the beaker and start the timer. When the Alka-Seltzer tablet is fully dissolved, stop the timer and record the time.
9.) Acquire the last beaker with 50 mL of tap water. This beaker will have tap water in room temperature – there is no need to heat or cool
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