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“To prepare 100 L of 12% hydrogen peroxide solution, you would need approximately 465.5 g of sodium percarbonate.
As for the water, you’ll need to dissolve the sodium percarbonate in it. A general rule of thumb is to use a 1:10 to 1:20 ratio of sodium percarbonate to water (w/w). Based on this, you could use:
465.5 g sodium percarbonate + 4,655 g to 9,310 g water (approximate)
Keep in mind that this calculation is an estimate, and the actual yield may vary…”