chemistry

Acid & Base Equilibria Home > Analytical Chemistry > Acid & Base Equilibria ACID & BASE EQUILIBRIA - STRONG ACIDS & BASES Ionic equilibrium - A general expression of the pH of a strong acid Strong acids and bases - Weak acid and bases - Dissociation constants and pK's pH of a strong acid – Examples     Strong Acids & Bases: pH Calculations involving mixtures of strong acids and bases       Chemical Equilibrium Calculations in Analytical Chemistry   Self-ionization of water - Autoionization of water - The ion product of water (kw)   ACID & BASE EQUILIBRIA - WEAK ACIDS & BASES 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 ...

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...

Weak Acid Weak Base pH calculation solved example 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 Base pH calculation - Solved Example In a previous post entitled “ Weak Acids and Bases – Calculate the pH of a weak acid ” a general equation was derived for a weak acid base pH calculation (mathematical approach). A four-step method was also proposed for weak electrolyte pH calculation ( calculate the pH for a weak acid - calculate the pH for a weak base , chemical approach) (Fig. I.1). Solved examples using the above four-step method were presented in the post “ Solving Weak Acid and Weak Base pH problems ” Some extra solved examples on weak acid (base) chemistry are shown below. The “chemical approach” method is used for the solution.    Fig. I...

pH Calculations involving mixtures of strong acids and bases Home > Ionic Equilibrium - Strong Acids and Bases – A general relation for the pH of a strong acid. > Strong acid and bases - Weak acid and bases - Dissociation constants and pK's > pH of a strong acid – Examples > Strong Acids & Bases: pH Calculations involving mixtures of strong acids and bases   Strong Acids & Bases: Calculations involving mixtures of strong acids and bases Solutions containing two or more strong acids or two or more strong bases or a strong acid and a strong base are encountered very frequently in many practical applications of chemistry or in the chemical laboratory. In most cases like these chemistry intuition is needed to calculate the pH or pOH values of the solutions. In previous posts entitled " Strong acid and bases - Weak acid and bases - Dissociat...

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 > Polyprotic Acids / pH Calculation Polyprotic Acids / pH Calculation A large number of acids can give two or more protons on ionization ( dissociation ) and these are referred to as polyprotic acids . For example, with sulfurous acid (H 2 SO 3 ) we have the successive ionizations: Fig. I.1: Stepwise dissociation of sulphurous acid (H 2 SO 3 ) A polyprotic acid always dissociates in a stepwise manner, one proton at a time. Note that the acid dissociation constants are labelled k a1 and k a2 . The numbers on the constants refer to the particular proton of the acid that is ionizing. Thus, k a1 always refers to the equilibrium involving removal of the first prot...