Exercise 108. The Gel of Ferrous Hydroxide

Preliminary to the preparation of the gel of ferrous hydroxide, it will be necessary to prepare a solution of sodium ferrate, NazFeCh. This can be done electro-lytically according to the directions in Exercise 22. 

Into a small beaker, measure 10 cc. of concentrated formic acid and into another beaker, 20 cc. of the alka- 

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