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2) Calculations to determine the amount of CO2(g) produced in the Baking Soda-Vinegar reaction
Starting Material: 40 ml Vinegar - SpecificGrav (CH3COOH) = 1.05 & vol%(CH3COOH) = 5 vol%
a) Calculate the stoichiometric amount (moles and grams) of sodium bicarbonate needed.
[CH3COOH(aq.) + H2O(l)]+ NaHCO3(s) --> H2O(l) +CO2(g) + NaCH3COO(aq.)
c) Given that 1 mol of an ideal gas at standard temperature and pressure occupies 22.4 L,
calculate the Ideal Gas Constant (R) in units of liter-atm/mol-K.
NOTE: Remember R is calculated at Standard Temperature and Pressure (STP = 273 K, 1atm)
d) Use the Ideal Gas Law to calculate the volume of CO2 you expect to be produced from the
stoichiometric reaction of your 40 mL of vinegar at the room temperature (e.g. probably
roughly T = 20 `C). How many moles of CO2 is that?
e) What would be the pressure in a 700 mL Propel plastic sports drink bottle if you ran this
reaction inside it with the valve cap closed?
f) Limiting Reactant Concept
Given 75 mL of vinegar and 8 g baking soda (BS), which is the limiting reactant (i.e. the
limiting reactant is the reactant that would be fully consumed by the reaction while other
reactants are present in excess and would still have unreacted material present after the
reaction)? Show calculations. What would be the volume of CO2 gas produced and the
pressure in the Propel bottle under these conditions? Show calculations.
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