Chemical analysis of stain remover containing 10.0 ml oxalic acid was conducted. Oxalic acid was titrated with 0.485 mol/L potassium hydroxide. Calculate the concentration of oxalic acid in the stain remover.

To calculate the concentration of oxalic acid in the stain remover, we need to determine the amount of potassium hydroxide (KOH) required to neutralize the oxalic acid.

To do this, we can use the balanced chemical equation for the reaction between oxalic acid (H2C2O4) and potassium hydroxide (KOH):

H2C2O4 + 2KOH -> K2C2O4 + 2H2O

From the balanced equation, we can see that it takes 2 moles of KOH to react with 1 mole of H2C2O4.

The volume of KOH used in the titration is not given, so it's not possible to directly calculate the concentration of oxalic acid in the stain remover. More information is needed.