Density-to-Molarity Converter (using density and MW) Mode % w/w + Density + MW → M % w/v + MW → M Molality + Density + MW → M Precision 3 sig figs 6 sig figs % w/w Density ρ (g/mL) Molecular weight (g/mol) % w/v (g per 100 mL) Molecular weight (g/mol) Molality m (mol/kg … Read more
Stock Solution Dilution Calculator (Serial Dilution) Mode Single Dilution (C₁V₁=C₂V₂) Serial Dilution Planner Precision 3 sig figs 6 sig figs Concentration unit MmMµMnM% w/v% v/vmg/mLµg/mL Volume unit µLmLL Stock concentration Cstock Target concentration Ctarget Final volume Vfinal Single-mode identity C₁V₁ = C₂V₂ → Vstock = (C₂·Vfinal)/C₁ Serial plan setup By steps (2–12) By fixed factor … Read more
1. Identification Summary Ester denotes the carboxylate ester functional group with general formula R–C(=O)–OR′ (R, R′ = carbon substituents). Esters are polar, aprotic, H-bond acceptors (C=O, C–O) but not donors, display a characteristic IR C=O band ~1735 cm⁻¹ for saturated aliphatic esters (lower with conjugation or ring strain), and strong C–O stretches ~1050–1300 cm⁻¹. ¹³C … Read more
1. Identification Summary Aldehyde is a carbonyl functional group in which the carbonyl carbon is bonded to one hydrogen and one carbon (R–CHO). It is a terminal, sp², trigonal-planar carbonyl that is strongly electrophilic; hallmark spectroscopic features include a C=O IR band ~1720–1740 cm⁻¹ (lower with conjugation) and a diagnostic aldehydic C–H doublet near ~2720/2820 … Read more
1. Identification Summary Fructose is a ketohexose monosaccharide (C₆H₁₂O₆). It exists predominantly as furanose/pyranose hemiketals in solution and serves as a dietary sugar and endogenous metabolite in human carbohydrate metabolism. Brand Names Not applicable. Name Fructose (D-fructose) Background Naturally present in fruits, honey, and sucrose (as the fructosyl moiety). Principal intestinal transporter GLUT5; hepatic entry … Read more
1. Identification Summary Pyridine is a six-membered nitrogen heteroaromatic (C₅H₅N) isoelectronic with benzene, with a ring sp²-N that is basic (conjugate-acid pKₐ ≈ 5.2). It serves as a solvent, ligand, mild base/nucleophile, and core scaffold in many pharmaceuticals and agrochemicals. Brand Names Not applicable. Name Pyridine Background Aromatically stabilized azabenzene; lone pair on ring nitrogen … Read more
Buffer Solution Calculator Buffer Solution Calculator Mode Two-stock (acid/base forms) Single-stock + titrant Precision 3 sig figs 6 sig figs Buffer system (optional pick) — Select a buffer (fills pKa) —Acetate (pKa 4.76)Phosphate H₂PO₄⁻/HPO₄²⁻ (pKa 7.21)Tris (pKa 8.06)Citrate pKa1 4.76Citrate pKa2 6.40HEPES (pKa 7.55)MES (pKa 6.10)MOPS (pKa 7.20)PIPES (pKa 6.80)Ammonium (pKa 9.25)Bicarbonate (pKa 6.10) Citrate … Read more
Titration Calculator Titration Calculator Mode Find unknown concentration (Ca) Find equivalence volume (Vt) Chemistry type Acid–Base Redox Precision 3 sig figs 6 sig figs Titrant concentration Ct (mol/L) Titrant volume Vt (mL) Analyte concentration Ca (mol/L) Analyte volume Va (mL) Stoichiometric coefficients (νt : νa) Redox n-electron change (optional) If provided, n defines the effective … Read more
Mole Fraction Calculator Mole Fraction Calculator Input mode Moles Mass + Molar Mass Precision 3 sig figs 6 sig figs Add component Reset Calculate Clear Inputs Download TXT Download PDF Download CSV Download JPEG Component Moles ni (mol) Mole fraction xi Badge Total moles: Timestamp: Introduction Mole fraction expresses the share of each component in … Read more
ppm/ppb Calculator (parts per million/billion concentration) Mode Mass / Mass Mass / Volume Result unit ppm ppb Precision 3 sig figs 6 sig figs Solute mass Unit mggμg Solution mass Unit gkg Solute mass Unit mggμg Solution volume Unit mLL Density (g/mL) (optional) Calculate Reset Download TXT Download PDF Download CSV Download JPEG Result Solute … Read more
