16 ± 0,5 ml of hydrochloric acid is added to a 3 litre beaker containing 2,0 litre of tap water, preheated to 46 to 48 oC; a stirring rod is placed in the beaker, the beaker is placed on the preheated plate and the stirring is started.
16 ± 0,5 ml soolhapet lisatakse 3-liitrisesse keeduklaasi, mis sisaldab 2,0 liitrit temperatuurini 46–48 oC eelsoojendatud kraanivett; segamispulk asetatakse keeduklaasi, keeduklaas asetatakse soojendatud plaadile ja alustatakse segamisega.