Calculating [H+] & pH If the concentration of H+?of an acid or alkali is known, the?pH?can be calculated using the equation: pH = -log [H+] Similarly, the?concentration?of?H+?of a solution can ...
Calculating pH, Ka, pKA & Kw pH The?pH?indicates the?acidity?or?basicity?of an acid or alkali The pH scale goes from 0 to 14 Acids have pH between 0-7 Pure water is?neutral?and has a pH of 7 Ba...
Conjugate Acids & Bases A?Br?nsted acid?is a species that can donate a proton For example, hydrogen chloride (HCl) is a Br?nsted acid as it can lose a proton to form a hydrogen (H+) and chlorid...
Calculating Free Energy Change Using Standard Electrode Potentials The?standard free energy change?can be calculated using the standard cell potential of an electrochemical cell ΔG??= - n x?Ecell??...
The Nernst Equation Under non-standard conditions, the cell potential of the half-cells is shown by the symbol?Ecell The effect of changes in?temperature?and?ion concentration?on the?Ecell?can be d...
Effect of Concentration on Electrode Potential Changes in?temperature?and?concentration?of aqueous ions will affect the standard electrode potential (E?) of a half-cell Under these?non-standard con...
Electrochemical Series The?E??values of a species indicate how?easily?they can get?oxidised?or?reduced In other words, they indicate the relative?reactivity?of elements, compounds and ions as?oxidi...
Calculating Standard Cell Potential Once the standard electrode potentials (E?) of the half-cells are determined, the?standard cell potential?(Ecell?) can be calculated by?subtracting?the?less?posi...
Calculations in Electrolysis Faraday’s constant?can be used to calculate: The?mass?of a substance?deposited?at an electrode The?volume?of gas?liberated?at an electrode Calculating the mass of a sub...
