Garrett, A. E · London : Hodder and Stoughton · leaf 201
f caustic soda or potash by dissolv-ing about 1 inch of one of the ordinarysticks in about 100 cubic centimetres of dis-tilled water. Add the dilute caustic soda tothe first solution until the light blue precipi-tate ceases to be formed. Filter so as toremove the light blue substance, which…
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