For a chemistry assignment, I have to complete a back titration of an aspirin tablet to find the amount of acetylsalicylic acid. I weighed one tablet, crushed it and placed it into a volumetric flask with 250mL of NaOH. I then pipetted 25mL of this solution and titrated it against HCL. I am anticipating that I will get a mass of acetylsalicylic acid that x10 smaller than the actual amount. But by using 25mL of the 250mL solution, is this an acceptable method or will the results be off?