from The Century Dictionary and Cyclopedia
- n. In chem., containing in each liter, as a solution, a number of grams of the dissolved substance numerically equal to one hundredth part of its molecular weight, or, in some cases, of its equivalent weight.
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The process is carried out thus: Add to the liquid in the beaker a few drops of the ferric-alum solution to act as an indicator, and from a burette carefully drop in centinormal ammonic thiocyanate until a permanent red coloration of ferric thiocyanate barely appears.
One c.c. of centinormal solution of iodine is equivalent to
Mauricheau-Beaupré has elaborated a volumetric method for the estimation of the phosphine in crude acetylene depending on its decomposition by a known volume of excess of centinormal solution of iodine, addition of excess of standard solution of sodium thiosulphate, and titrating back with decinormal solution of iodine with a few drops of starch solution as an indicator.