Write an article based on this "Combine calcium chloride and water in a 1:3 ratio. Use bleach or lemon juice as an alternative to the calcium chloride solution. Stir together the calcium chloride solution and charcoal powder. Cover the bowl and let the charcoal sit for 24 hours. Cook the charcoal for another 3 hours to activate it."
Be careful when you mix these substances; doing so will cause the solution to get very hot. You’ll need enough of the solution to cover the charcoal completely. For normal-sized batches of charcoal, 100 g (3.5 oz) of chloride mixed with 1.3 cups (310 ml) of water should be enough. Calcium chloride can be bought at most hardware stores, home centers, and general retailers. If you can’t find calcium chloride, you can substitute it for bleach or lemon juice. Just use either 1.3 cups (310 ml) of bleach or 1.3 cups (310 ml) of lemon juice instead of the calcium chloride solution. Transfer the dry charcoal powder to a stainless steel or glass mixing bowl. Add the calcium chloride solution (or the lemon juice or the bleach) to the powder in small increments, stirring it with a spoon as you do so. When the mixture reaches paste consistency, stop adding the solution. Cover the bowl and allow it to sit untouched. After that, drain as much of the remaining moisture from the bowl as possible. At this point, the charcoal should be wet, but not saturated. Return your charcoal to the (cleaned) metal pot and put it back on a fire. The fire will need to be hot enough to boil water for the charcoal to activate. After cooking for 3 hours at this temperature, the charcoal will be activated.