In this video we show how to make potassium chlorate from bleach.


To do this we boil down sodium hypochlorite to convert it into sodium chloride and sodium chlorate. While that's happening, in a separate container we dissolve an excess of potassium chloride in water to create a saturated solution. Continue boiling the bleach until sodium chloride crystals begin to form. Note the volume and boil off half of it.Sodium chlorate has higher solubility than sodium chloride, so boiling removes more sodium chloride, improving the yield. Stop heating and let the solution cool to room temperature. Filter out the sodium chloride crystals to retain the filtrate containing sodium chlorate and sodium chloride. Mix the filtrate with an equal volume of the saturated potassium chlorate solution to produce potassium chlorate, which precipitates out. Filter and collect the solid potassium chlorate.


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