I. Purpose
We did this experiment to learn how to use stoiciometry with the ideal gas law to figure out the amounts of substances within a compound.
II. Hypothesis
If I measure the circumference of a balloon filled with gas and use it to determine the volume of gas, then I can use the ideal gas equation to find the number of moles of gas it contains.
III. Procedure
First we rinsed a 2-liter bottle with tap water. Then we measured out 200.0 g of white vinegar into the bottle using a mass scale and a funnel. Meanwhile, we measured out at least 30.0 g of baking soda into a balloon using another mass scale. We attached the balloon to the neck of the bottle, making sure it was completely attached with an airtight seal. We held up the balloon, letting the baking soda fall into the vinegar. After swirling the bottle around to make sure all of the baking soda reacted with the vinegar, we measured the circumference of the now-inflated balloon with a seamstress' tape measure. Finally, we cleaned up after doing some calculations.
IV.
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Data and Observations
Circumference: 57.50 cm = 5.750 dm
Radius = 5.750 dm ÷ 2π = 0.916 dm
V = 4/3πr3 = 4/3π(0.916 dm)3 = 3.22 dm3 = 3.22 L
Troom = 23.0 C so water vapor pressure = 21.1 torr = 0.0278 atm pressure of CO2 = total pressure - water vapor pressure = 1.003296 atm - 0.0278 atm = 0.975 atm
Tcarbon dioxide = 23.0 C = 296.0 K
Ideal Gas Law: PV = nRT n = PV ÷ RT = (0.975 atm)(3.22 L) ÷ (0.0821 L x atm/mole x K)(296.2 K) = 0.129 moles CO2
1 mole CO2 = 1 mole acetic acid, so 0.129 moles CO2 = 0.129 moles acetic
The purpose of this experiment was to examine how the stoichiometry, “the quantitative relationships between substances involved in a chemical reaction”, can be applied to determine the quantity of sodium hypochlorite found in a bleach product. This experiment allowed it to determine how much oxidizing agent is in a cleaner by using a redox reaction, which is a reaction involving the transfer of electrons from the compound being oxidized to the compound being reduced. To determine the amount of oxidizing agent, it is necessary to accurately measure out known amounts of redox reactants, know the stoichiometry
The aim of this experiment is to find out how much gas is given off by
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Evaluation I think that the method used in the experiment is not very accurate because the way we measure the amount of gas produced is not very
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I then measured to see how long it would take to gain 100 cm3 of CO2
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The best way to measure gasses is by creating a closed system for an experiment
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First, blow up the balloon to the first circumference that is on your table, making sure your circumference is accurate by using the measuring tape. Hold the opening with your hand so that no air leaks out, but don't tie it up. Next, stick the balloon onto the tape. After this, let go! Measure how far the balloon traveled using the measuring tape, making sure to record that data in your table. Repeat this two more times for the other two trials. Then, find the average and put it in the table. Finally, do the same thing for the other two circumferences. Now, you have finished your experiment and completed this