Information needed to determine Molarity of CH3CO2H
To determine the molarity of CH3CO2H (acetic acid), you would need the following information:
1. Balanced chemical equation: The balanced chemical equation for the dissociation of acetic acid is CH3CO2H ⇌ CH3CO2- + H+. This equation indicates that each molecule of acetic acid dissociates into one acetate ion (CH3CO2-) and one hydrogen ion (H+).
2. Volume of acetic acid: You need to know the volume of acetic acid in liters (L) or milliliters (mL) that you are working with. This is typically measured using a graduated cylinder or pipette.
3. Concentration of acetic acid: The concentration of acetic acid can be given in different units such as molarity (M), percent (%), or mass/volume (g/L). The molarity (M) is the most commonly used unit. It represents the number of moles of acetic acid dissolved in one liter of solution.
4. Stoichiometric ratio: The stoichiometric ratio is the ratio of moles of acetic acid to moles of hydrogen ions. From the balanced chemical equation, the stoichiometric ratio is 1:1, meaning that for every mole of acetic acid that dissociates, one mole of hydrogen ions is formed.
Using this information, you can calculate the molarity of CH3CO2H by dividing the moles of acetic acid (determined from the volume and concentration) by the volume of the solution in liters.
Molarity (M) = Moles of CH3CO2H / Volume of solution (in liters)