I have done a practical trying to determine the enthalpy of solution of oxalic acid. One part of the practical was to determine the concentration of oxalic acid in saturated solutions at different temperatures. I'm not sure my results are correct or not. I would expect that with an increase in temperature the solution would contain more oxalic acid, yet my results are not representative of this. does the solubility of oxalic acid not increase with an increase in temperature?