7.3 Primary Standard—Where specified, these samples, or
samples of commercially available primary standards, are to be
used in standardizing the volumetric solutions.
7.4 Ethanol, (Warning—Flammable and toxic, especially
when denatured.)
7.5 Lithium Chloride, LiCl.
7.6 Lithium Chloride Electrolyte , Prepare a 1M–3M solution
of lithium chloride (LiCl) in ethanol.
7.7 Potassium Hydroxide, (Warning—Causes severe burns.)
7.8 Propan-2-ol, Anhydrous, (less than 0.1 % H2O). (Warning
—Flammable.) If adequately dry reagent cannot be
procured, it can be dried by distillation through a multiple plate
column, discarding the first 5 % of material distilling overhead
and using the 95 % remaining. Drying can also be accomplished
using molecular sieves such as Linde Type 4A, by
7.3 Primary Standard—Where specified, these samples, orsamples of commercially available primary standards, are to beused in standardizing the volumetric solutions.7.4 Ethanol, (Warning—Flammable and toxic, especiallywhen denatured.)7.5 Lithium Chloride, LiCl.7.6 Lithium Chloride Electrolyte , Prepare a 1M–3M solutionof lithium chloride (LiCl) in ethanol.7.7 Potassium Hydroxide, (Warning—Causes severe burns.)7.8 Propan-2-ol, Anhydrous, (less than 0.1 % H2O). (Warning—Flammable.) If adequately dry reagent cannot beprocured, it can be dried by distillation through a multiple platecolumn, discarding the first 5 % of material distilling overheadand using the 95 % remaining. Drying can also be accomplishedusing molecular sieves such as Linde Type 4A, by
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