First-Order vs Zero-Order Kinetics Tool Visualize and compare drug elimination kinetics models. Interactively plot first- and zero-order decay. Initial concentration (C₀) ? mg/Lµg/mL Rate constant (k) ? Duration of time ? hoursminutes Plot step ? Adjust C₀: 10 k: 0.2 Calculate Reset First-order: Most drugs (e.g., penicillin, morphine) Zero-order: Ethanol, phenytoin, high-dose aspirin First-Order Zero-Order … Read more
Beer-Lambert Law Absorbance Calculator | PharmacyFreak.com Beer-Lambert Law Absorbance Calculator Calculate absorbance (A) for spectrophotometry experiments using Beer-Lambert law. Visualize absorbance trends and check optimal range. Molar Absorptivity (ε) ? Concentration (c) ? mol/Lmg/mL Molar Mass (g/mol) ? Needed only if conc. is in mg/mL Path Length (l) ? cm Significant Figures ? 234 Calculate … Read more
Rf Value Calculator Calculate the Retention Factor (Rf) for TLC and other chromatography. Visualize the chromatogram and get ideal-range feedback. Distance traveled by compound ? Distance traveled by solvent front compound distance).”>? Units ? cmmm Calculate Reset What is Rf? Ratio describing how far a compound moves relative to the solvent. Why ideal Rf? 0.3–0.8 … Read more
Chromatographic Resolution Calculator Calculate retention factor (Rf) and resolution (Rs) with step-by-step breakdown. For TLC, HPLC, and pharma analysis Retention factor (Rf) Distance moved by compound ? cmmm Distance moved by solvent front ? cmmm Calculate Rf Resolution (Rs) Retention time of compound 1 (tR₁) ? mins Retention time of compound 2 (tR₂) ? mins … Read more
pH from pKa Calculator | PharmacyFreak pH from pKa Calculator Calculate pH using pKa and % ionization. Henderson-Hasselbalch Equation for acidic/basic drugs Drug Type ? AcidicBasic pKa Value ? % Ionized Form ? Significant figures ? 234 Calculate Reset What is pH? A measure of acidity/basicity (0 = very acidic, 14 = very basic). What is … Read more
pKₐ to Kₐ Calculator Instantly convert a drug’s pKₐ value back to its acid dissociation constant (Kₐ). This tool helps you understand the inverse logarithmic relationship between these two key measures of acid strength. 1. Enter pKₐ ValueiWhat is pKₐ?A number used to express the acidity of a weak acid. It is the negative base-10 … Read more
pH to pKₐ Calculator Determine the pKa of a drug by inputting its % ionization at a known pH. This tool uses the Henderson-Hasselbalch equation to help you characterize your compound’s acidic or basic nature. 1. Drug TypeiAcidic drugs (e.g., Aspirin) donate a proton. They are mostly unionized at low pH and become ionized (charged) … Read more
Kₐ to pKₐ Calculator Easily convert the acid dissociation constant (Kₐ) to its logarithmic pKₐ value. This tool helps you quickly assess and compare acid strength, a fundamental concept in chemistry and pharmacy. 1. Enter Kₐ ValueiWhat is Kₐ?The acid dissociation constant. It’s a measure of how much an acid dissociates in solution. A small … Read more
pKa Calculator | PharmacyFreak pKa Calculator Find the pKa of acidic or basic drugs using % ionization and pH. Educational tool for pharmacy students. Compound Type ? AcidicBasic pH of Solution ? % Ionized ? Calculate Reset Export PNG Export PDF pKa Calculator Tool – Understand Drug Ionization Instantly The pKa Calculator Tool is a … Read more
pKa & Ionization State Calculator Tool Calculate % ionized/unionized drug at any pH. Supports acids, bases, and up to 3 pKa values. Forward Mode Reverse Mode ? Compound Type ? AcidicBasic Number of pKa values ? 123 pH of Environment ? Use custom temperature Calculate Compound Type ? AcidicBasic % Ionized ? pH ? Calculate … Read more
