Product mass from limiting reactant calculator

Inputs, units, and the two-reactant limiting path

Zero molar mass or zero coefficient fails with invalid_input so callers never see infinity or NaN disguised as a result. Documented aliases such as mass_a, mm_b, nu1, and nu_product are accepted when the parameter contract lists them. Identical inputs always produce identical JSON because the path is pure arithmetic with no network, no random seed, and no wall clock.

Reading product_mass, limiting labels, and error cases

On success the response echoes all eight numeric inputs with stable rounding, lists moles_reactant1 and moles_reactant2, reports equivalents1 and equivalents2 as the n over ν ratios, and sets reaction_extent to the smaller of those equivalents. The primary answer is product_mass in grams with unit set to g, together with moles_product, a formula string for the combined expression, and method label limiting_reactant_product_mass for downstream branching. The field limiting_reactant is reactant1, reactant2, or both when the reagents are present in exact stoichiometric ratio; excess_reactant names the non-limiting partner or none when there is no excess. Use product_mass alone when a UI needs a single headline number; use limiting_reactant and the equivalent fields when a worked-solution panel must show which reagent runs out first; use moles_product when a mole table is required before converting to mass. Missing any required field, non-finite values, negative mass, zero or negative molar mass, and zero or negative coefficients all fail with invalid_input and are not charged after the engine rejects the request. This calculator does not assume a single known-limiting mass without comparing two reagents—pair it with mass-of-product-from-reactant when only one reactant amount is given. It also does not look up molar masses from chemical formulas; feed tabulated or previously computed grams per mole so the arithmetic stays fully determined.

API usage, pricing, classroom workflows, and practical limits

Call the free in-browser product mass from limiting reactant calculator for homework checks, lecture demos, and quick lab prep without installing a spreadsheet or a chemistry package. Classic classroom examples include ten grams of oxygen with five grams of hydrogen forming water under a one-to-two reactant ratio, or combustion problems where fuel and oxygen compete as limiting reagents. Source inputs follow the same retention rules as other KIT parse items. Send a JSON body with reactant1_mass, reactant1_molar_mass, reactant1_coeff, reactant2_mass, reactant2_molar_mass, reactant2_coeff, product_molar_mass, and product_coeff as finite numbers or numeric strings. Use the prepaid API when a tutoring platform, learning-management plug-in, curriculum generator, or process-engineering notebook needs a stable contract under KIT balance at $0.002 per successful item; validation failures never consume balance after rejection. Authors shipping SDKs can map limiting_reactant, reaction_extent, and product_mass directly into a results table with the same columns students fill when they apply limiting-reactant mass stoichiometry by hand.