Researching chemistry: volumetric analysis Flashcards
how do you prepare a standard solution
weighing a primary standard accurately
dissolving in a small volume of solvent (usually deionised or distilled water) in a beaker
transferring the solution and rinsings into a volumetric flask
making up to the graduation mark with solvent
stoppering and inverting
what is the other way a standard solution be made up
by accurate dilution by
pipetting an appropriate volume of a standard solution into a volumetric flask, making up to the graduation mark with solvent, stoppering and inverting.
what are the musts of a primary standard
be available in a high state of purity
be stable when solid and in solution
be soluble
have a reasonably high GFM
what are some examples of primary standards
sodium carbonate
hydrated oxalic acid
potassium hydrogen phthalate
silver nitrate
potassium iodate
potassium dichromate