final mass initial mass CO2 mass
(1.) 84.755 minus 85.672 = .917
(2) 84.733 minus 85.684 = .951
(3) 84.757 minus 85.707 = .95
what is maximum volume of vinigar that can be neutralized by one alka seltzer tablet and explain? Not sure how to get this answer....HELP!
Assuming NaHCO3 is the active ingredient in Alka-Seltzer that would react with vinegar,
2NaHCO3 + 2HC2H3O2(vinegar) ==> 2NaC2H3O2 + 2CO2 + 2H2O
Convert grams CO2 to moles CO2. moles = grams/molar mass.
Using the coefficients in the balanced equation, convert moles CO2 to moles vinegar.
Convert moles vinegar to grams. grams = moles x molar mass.
To get to the volume of vinegar from the grams vinegar, you need to know the percent acetic acid in vinegar. I have seen both 4% acetic acid and 5% acetic acid at the store for vinegar. If we use 4%, the number will be larger and the questin asks for maximum volume so let's use that figure. I will call acetic acid HAc.
percent acetic acid = (4 g HAc/100 g solution)
Therefore, 100 g soln x (g vinegar needed/4) = ??
Now you have grams vinegar. Convert to mL using the density of vinegar of 1.01 g/mL.
To determine the maximum volume of vinegar that can be neutralized by one Alka-Seltzer tablet, you need to understand the concept of neutralization and the stoichiometry of the reaction.
Neutralization is a chemical reaction between an acid and a base that results in the formation of a salt and water. In this case, vinegar (acetic acid) is the acid, and the Alka-Seltzer tablet contains sodium bicarbonate (NaHCO3), which acts as the base.
The balanced chemical equation for the neutralization reaction between acetic acid and sodium bicarbonate is:
CH3COOH + NaHCO3 → CH3COONa + H2O + CO2
From the equation, you can see that one molecule of acetic acid reacts with one molecule of sodium bicarbonate to produce one molecule of sodium acetate, one molecule of water, and one molecule of carbon dioxide.
Now, to find the maximum volume of vinegar that can be neutralized by one Alka-Seltzer tablet, we need to consider the amount of acetic acid and sodium bicarbonate available in the tablet.
First, find the molar mass of acetic acid (CH3COOH) and sodium bicarbonate (NaHCO3):
- Acetic acid (CH3COOH) molar mass: 60.05 g/mol
- Sodium bicarbonate (NaHCO3) molar mass: 84.01 g/mol
Since the molecular weight of sodium bicarbonate is greater than acetic acid, we can assume that acetic acid is the limiting reactant. This means that the amount of acetic acid determines the maximum amount of vinegar that can be neutralized.
Now, we need to convert the mass of the Alka-Seltzer tablet to moles of acetic acid. Using the given data, for example, considering equation (1) with the difference of .917:
- Mass of Alka-Seltzer tablet: 0.917 g
- Moles of acetic acid = Mass of acetic acid / Molar mass of acetic acid:
= 0.917 g / 60.05 g/mol
Calculate the moles of acetic acid using the above formula, you will get the number of moles of acetic acid present in one Alka-Seltzer tablet.
Once you have the moles of acetic acid in one tablet, you can use stoichiometry to determine the volume of vinegar that can be neutralized. According to the balanced equation,
1 mole of acetic acid reacts with 1 mole of sodium bicarbonate to produce 1 mole of CO2
Since the molar ratio between acetic acid and CO2 is 1:1, the number of moles of acetic acid in the Alka-Seltzer tablet is equal to the number of moles of CO2 produced.
Finally, given the molar volume of an ideal gas at standard temperature and pressure (STP) is approximately 22.4 L, you can calculate the maximum volume of vinegar that can be neutralized by dividing the moles of acetic acid by 1 and multiplying by 22.4 L/mol.
Repeat the same process for equations (2) and (3) to find the maximum volume of vinegar that can be neutralized for each scenario.
Note: The given calculations are based on the assumption that the reaction goes to completion, which may not be entirely accurate in reality due to other factors.