I'm trying to make a KH (carbonate hardness) reference solution.
I'll be using baking soda and di water.
What I'm trying to determine is how to prepare the baking soda. It would need to be dry to make the solution accurate.
For example:
Using 5 liters of di water, if I wanted the reference solution to be 50dKH I would need to add 6.24 grams of baking soda.
But I'm not sure how dry the baking soda should be for this. If you dry it to much it starts to change chemicals composition.
Does anyone know how I should prepare the baking soda or where to find this information?
Thanks,
Bill