Answer:
To find the molarity of H2C2O4 (oxalic acid), we need to know the number of moles of H2C2O4 and the volume of the solution in liters.
Let's assume we have 10 grams of H2C2O4 and we dissolve it in enough water to make 1 liter of solution.
The molar mass of H2C2O4 can be calculated by adding the molar masses of the individual atoms:
molar mass of H2C2O4 = 2(1.01) + 2(12.01) + 4(16.00) = 90.04 g/mol
To calculate the number of moles of H2C2O4 in the solution, we divide the mass of H2C2O4 by the molar mass:
moles of H2C2O4 = mass of H2C2O4 / molar mass
moles of H2C2O4 = 10 / 90.04
moles of H2C2O4 = 0.111 mol
Therefore, we have 0.111 moles of H2C2O4 in 1 liter of solution.
The molarity of the solution is defined as the number of moles of solute per liter of solution:
Molarity = moles of solute / volume of solution (in liters)
Molarity = 0.111 mol / 1 L
Molarity = 0.111 M
Therefore, the molarity of the H2C2O4 solution is 0.111 M.
Step-by-step explanation: