Calculate the mass of oxalic acid needed to prepare 150 ml of 0.442 M C2H2O4
mols needed=- M x L = ?
grams = mols x molar mass
To calculate the mass of oxalic acid needed to prepare a given concentration solution, you'll need to use the formula:
\(Molarity = \frac{{\text{{moles of solute}}}}{{\text{{volume of solution in liters}}}}\)
Let's break down the steps to calculate the mass:
Step 1: Convert the volume of the solution to liters.
Given: Volume of solution = 150 ml
\(1 \text{{ L}} = 1000 \text{{ ml}}\)
Therefore, the volume of the solution in liters is \(150 \text{{ ml}} \times \frac{1}{1000} = 0.150 \text{{ L}}\).
Step 2: Rearrange the formula to calculate the moles of solute.
\(Molarity = \frac{{\text{{moles of solute}}}}{{0.150 \text{{ L}}}}\)
Rearranging the formula, we get:
\(\text{{moles of solute}} = Molarity \times 0.150 \text{{ L}}\)
Step 3: Substitute the values into the formula.
Given: \(Molarity = 0.442 \text{{ M}}\) (Molar concentration)
Substituting the values, we get:
\(\text{{moles of solute}} = 0.442 \text{{ M}} \times 0.150 \text{{ L}}\)
Step 4: Calculate the moles of solute.
\(\text{{moles of solute}} = 0.442 \times 0.150\)
Step 5: Calculate the mass of the solute using the molar mass.
The molar mass of oxalic acid (C2H2O4) is \(2 \times 12.01 + 2 \times 1.01 + 4 \times 16.00 \text{{ g/mol}}\).
Calculate the molar mass to obtain the mass of one mole of oxalic acid.
Step 6: Multiply the moles of solute by the molar mass to get the mass of oxalic acid.
Mass of oxalic acid = Moles of solute x Molar mass of oxalic acid
By following these steps, you'll be able to calculate the mass of oxalic acid needed to prepare the given concentration solution.