Place 2.4 grams of sulfanilic monohydrate in a 125 ml Erlenmayer flask and dissolve it in 25 ml of 25% aqueous sodium carbonate by boiling. Cool the solution in the flask with running water before adding 0.95 gram of sodium nirite with stirring to dissolve the solid. Pour the solution into a 50 ml Erlenmayer flask containing 12.5 grams of ice and 2.5 ml of concentrated hydrochloric acid. Within a few minutes the white diazonium sulfonate inner salt should form a suspension. Transfer half of it to a 100 ml beaker, and keep both containers cold until each is used in later step
Place 2.4 grams of sulfanilic monohydrate in a 125 ml Erlenmayer flask and dissolve it in 25 ml of 25% aqueous sodium carbonate by boiling. Cool the solution in the flask with running water before adding 0.95 gram of sodium nirite with stirring to dissolve the solid. Pour the solution into a 50 ml Erlenmayer flask containing 12.5 grams of ice and 2.5 ml of concentrated hydrochloric acid. Within a few minutes the white diazonium sulfonate inner salt should form a suspension. Transfer half of it to a 100 ml beaker, and keep both containers cold until each is used in later steps.
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