Molarity from Concentrated Reagent
Stock molarity of a concentrated liquid reagent from its assay percent, density, and molecular weight (M = 10 x %w/w x density / MW), plus the volume of concentrate to draw for a target working solution. Add acid to water.
Formula and source
stock_M = 10 x purity_pct x density / MW (mol/L); volume_to_draw = target_M x final_volume / stock_M (mL).
Standard reagent preparation - stock molarity from assay and density, by name.
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