hi,
I am trying to find the solubility of Sodium Acetate by using 0.100 mol Hydroxide(base) and 0.837 mol acetic acid( vinegar).
The theoretical solubility of sodium acetate is 82.3g/100ml at 25C. Doing calculations we would want NAOH concentration of 10.47mol/l to react with the vinegar. Since this is not possible we are going heat up the solution mixed up of acetic acid and Hydroxide until a precipitate( which is sodium acetate) forms to find its solubility.
I know we need a lot less acetic acid but how we know how much we need of NAOH and Acetic acid? Also the temperate it starts precipitating is its solubility at that temp rite? but how do measure the mass(grams)
To determine the solubility of sodium acetate using the given quantities of hydroxide and acetic acid, you will need to follow these steps:
1. Determine the balanced chemical equation for the reaction between sodium acetate and hydroxide. This will help you calculate the stoichiometry of the reaction. The balanced equation is:
CH3COOH + NaOH → CH3COONa + H2O
From the equation, you can see that one mole of acetic acid reacts with one mole of hydroxide to form one mole of sodium acetate.
2. Calculate the moles of sodium acetate required based on the amount of hydroxide available.
Given that the hydroxide concentration is 0.100 mol and the stoichiometry of the reaction is 1:1, you would need 0.100 mol of sodium acetate.
3. Calculate the mass of sodium acetate needed.
Using the molar mass of sodium acetate, which is approximately 82.3 g/mol, you can determine the mass required.
Mass = moles × molar mass
Mass = 0.100 mol × 82.3 g/mol ≈ 8.23 g
So, you would need approximately 8.23 grams of sodium acetate for the reaction.
4. Determine the amount of acetic acid needed.
Using the stoichiometry of the reaction, which is 1:1, the number of moles of acetic acid needed will be the same as the number of moles of hydroxide used. Therefore, you would need 0.100 mol of acetic acid.
5. To find the point at which precipitation occurs, you will need to heat the mixture of acetic acid and hydroxide until a precipitate (sodium acetate) forms. This point represents the temperature at which the solubility of sodium acetate is reached for that specific temperature.
6. To measure the mass of the precipitate, you would need to filter it from the solution using a filter paper or a filtration setup. After filtration, the solid can be dried and weighed to determine its mass.
It's important to note that the solubility of sodium acetate at a given temperature is defined as the maximum amount of solute (sodium acetate) that can dissolve in a specific amount of solvent (water) at that temperature. So, the temperature at which precipitation occurs will indicate the point at which the solution is saturated and the solubility has been reached.