Two calculations a formulator does constantly: how much product and how much water make a solution of a given strength, and how far a stronger solution goes when diluted.
Strengths here are weight for weight (w/w). The make-up calculation assumes the product dissolves fully at the strength asked for and that volumes are additive, neither of which is true of every material at every temperature — check the solubility on the product page before relying on a figure. The dilution calculation is C1V1 = C2V2 and takes no account of volume change on mixing. Both are indicative arithmetic, not process advice, and neither replaces the guaranteed analysis or the Material Safety Data Sheet. Always add product to water in the order your MSDS specifies.
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