chemistry

Cubic equation calculator - Weak Acids and bases Home > Weak Acids and Bases – Calculate the pH of a weak acid (a general equation) > Solving Weak Acid and Weak Base pH problems > Weak Acid Weak Base pH calculation solved example > Weak Acid Weak Base pH calculation solved example > Cubic Equation Calculator for Weak Acid-Base Equilibria   Cubic Equation Calculator for Weak Acid-Base Equilibria The mathematical (algebraic) exact method for solving weak acid or weak base equilibrium problems has traditionally been less popular than the alternative approximate method, probably because of the inconveniences related to solving cubic equations. However, modern mathematics software or even spreadsheets like Excel 2010 handle such equations with ease, making the algebraic method more attractive than in the past. The mathematical approach to solving weak acid-base equilibria has been presented in...

Balancing Oxidation / Reduction Reactions Balancing Oxidation - Reduction reactions by the Oxidation Number In many important chemical reactions, electrons are transferred from atom to atom. Such reactions are called either oxidation – reduction reactions or redox reactions . Many important chemical reactions involve oxidation and reduction . In a previous post entitled “ Oxidation – Reduction (Redox) Reactions – Balancing Redox Reactions ” several examples of redox reactions were given and the concept of oxidation number was discussed. Solved examples for the determination of oxidation numbers to atoms in  chemical compounds were given in the post “ Oxidation Numbers: Assigning oxidation numbers to atoms in a chemical compound – Examples ”. A number of different techniques have traditionally been taught in beginning chemistry students for balancing chemical reactions. These methods are the following: Inspection : Most stud...