Molarity from Concentrated Reagent
Stock molarity of a concentrated liquid reagent from its assay percent, density.
Example
You enter
- Assay / purity (% w/w) 37
- Density (g/mL) 1.19
- Molecular weight (g/mol) 36.46
- Target molarity (mol/L, optional) 1
- Final volume to prepare (mL, optional) 1000
You get
- Stock molarity 12.08 mol/L
- Volume of concentrate to draw 82.8
Details, formula, and sources
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.
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.
Standard analytical-chemistry reagent-preparation relation; the reagent lot certificate of analysis governs.
Estimate. AHJ and licensed professional govern.
Field names used by the API: purity_pct, density_g_ml, mol_weight, target_m, final_volume_ml, stock_m, volume_to_draw_ml
- Assay and density the label weight percent and density are for the specific lot; verify against the certificate of analysisreagent lot COA