standard solution

• volumetric flask uncertainties

  100cm3 volumetric flask-> +/- 0.20cm3

  250cm3 volumetric flask-> +/- 0.30cm3
• preparing standard solution

  1. weigh solid accurately
  2. solid dissolved in a beaker using less distilled water than needed to fill vf to mark
  3. solution transferred to vf, last traces are rinsed into flask using distilled water
  4. flask carefully filled to graduation line by adding distilled water until bottom of meniscus lines up with mark
  5. invert vf slowly several times to mix solution thoroughly
• 10cm3 pipette->+/- 0.04cm3

  25cm3 pipette->+/- 0.06cm3

  50cm3 burette->+/- 0.10cm3