Researching chemistry: volumetric analysis Flashcards

1
Q

how do you prepare a standard solution

A

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

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2
Q

what is the other way a standard solution be made up

A

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.

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3
Q

what are the musts of a primary standard

A

be available in a high state of purity
 be stable when solid and in solution
 be soluble
 have a reasonably high GFM

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4
Q

what are some examples of primary standards

A

 sodium carbonate
 hydrated oxalic acid
potassium hydrogen phthalate
silver nitrate
 potassium iodate
 potassium dichromate

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5
Q
A
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