Chemistry is the Science of Matter where you learn about a matter’s composition & properties. How a matter is formed and what happens when it reacts with another matter or substance. This online tool of Chemistry calculator will help you to solve equations and problems related to Acid-Base Reactions, Buffers, Catalysis, Chemical Equilibrium, Empirical and Molecular Formulas, Electrochemistry, Electrolysis, Electron Quantum Numbers, Gas Laws (Ideal, Dalton’s and Graham’s Law), Ionic/Covalent Bonds, Ions and Molecules, Kinetics, Mass Spectrometry, Nuclear decay, Oxidation-Reduction Reactions, Percentage Composition, Significant Figures & Solution Concentration. Whether you need to calculate the pKa of a solution or just a pH, use WebQC pH calculator to find out. Use the formula of Activation Energy to know a reaction’s activation energy in J/mol instead of Btu/lb mol.