How much HCl and baking soda (NaHCO3) to completely fill a ziploc bag? - baking soda and hydrochloric acid in a bag
We do a chemistry experiment, how much hydrochloric acid and sodium bicarbonate is seen necessary to fill one gallons pocket of carbon dioxide. The bag does not work and must be fixed, if the reaction is complete.
Saturday, February 6, 2010
Baking Soda And Hydrochloric Acid In A Bag How Much HCl And Baking Soda (NaHCO3) To Completely Fill A Ziploc Bag?
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1 comments:
First I would check exactly what is the volume of the "1-gallon" bag because it may not be exactly equal to 1 gallon, so you can get a more accurate filling.
Let us assume that the bag is not exactly a gallon:
First convert 1 gallons liters x 3787 liters / gal = 3.785
Now, determine that the balanced equation of the reaction:
NaHCO3 + HCl ---> NaCl + H2O + CO2
(CO2 is a gas at room temperature)
Now, how many of 3.785 mol L-gas:
1 mol of a gas increases 22.4L @ STP as follows:
3.875L/22.4L/mole = 0.173 mol
So we must create the reagents that are sufficient in amounts to 0173 mol CO2 mix.
No specific concentration of acid or if the firm or say NaHCO3 solution that makes it difficult to exactly how much to mix.
Suppose you are with solid NaHCO3, 0.173 mol, or you will need:
0173 X [1.0 + 23.0 + 12.0 (3 x 16.0)] = 14.5g NaHCO3
You will be a sufficient amount of acid, you must have at least 0.173 mol HCl.
Note that both reagents occupy a portion of the volume of the bag, but probably neglegible. If the acid dillute gives you, you have to take the volume by the acid invoice.
If you are at home, you can their numbers before the time the lab trying to May, because you need a little more than the theoretical amount of the Company to make the pocket, but no rupture. make sure that is flat when you close the bag when a large amount of air and caught in the bag at first, he could explode. Try the acid and NaHCO3 in different corners of the bag to keep until it is flattened and sealed so that their response does not start too early and lost some of the CO2.
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