Analytical Chemistry |
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Pagina 590
of Analysis Procedure . Weigh three samples ( see instructor for size ) onto
individual 9 - cm filter papers ; drop each into a 500 - ml Kjeldahl flask ( the paper
wrapping will prevent the sample from clinging to the neck of the flask ) . Add 25
ml of ...
of Analysis Procedure . Weigh three samples ( see instructor for size ) onto
individual 9 - cm filter papers ; drop each into a 500 - ml Kjeldahl flask ( the paper
wrapping will prevent the sample from clinging to the neck of the flask ) . Add 25
ml of ...
Pagina 603
PREPARATION 8 - 1 Preparation of Starch Indicator Procedure . Make a paste by
rubbing about 2 g of soluble starch and 10 mg of Hgl , in about 30 ml of water .
Pour this into 1 liter of boiling water , and heat until a clear solution results .
PREPARATION 8 - 1 Preparation of Starch Indicator Procedure . Make a paste by
rubbing about 2 g of soluble starch and 10 mg of Hgl , in about 30 ml of water .
Pour this into 1 liter of boiling water , and heat until a clear solution results .
Pagina 604
Procedure . Dry a quantity of primary standard As2O3 for about 1 hr at 110°C .
For standardization of 0 . 1 - N 12 solutions weigh 0 . 2 - 8 samples ( to the
nearest 0 . 1 mg ) , and dissolve in 10 ml of 1 - F NaOH . When solution is
complete ...
Procedure . Dry a quantity of primary standard As2O3 for about 1 hr at 110°C .
For standardization of 0 . 1 - N 12 solutions weigh 0 . 2 - 8 samples ( to the
nearest 0 . 1 mg ) , and dissolve in 10 ml of 1 - F NaOH . When solution is
complete ...
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Sommario
Preface | 1 |
A Review of Some Elementary Concepts | 8 |
A Review of Simple Equilibrium Constant | 24 |
Copyright | |
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absorbance absorption acid activity added addition amount analysis analyte application approximately balance base becomes Calculate carbonate cause cell Chapter chemical chloride chromatography color column common complex concentration considered constant containing curve described determined deviation difference dilute direct Discussion dissociation dissolved drop effect electrode employed end point Equation equilibrium equivalence point error example excess exist expression Figure filter flask formation give given glass heating hydrogen hydroxide important increase indicator involves iodine less limited liquid liter mean measurements metal method NaOH needed Neutralization Note obtained occurs organic oxidation phase potassium potential precipitate prepared presence problem Procedure quantity radiation reaction reagent reduced region relative sample separation shown silver sodium solid solubility solution species standard substance surface Table temperature titration volume volumetric weight