<h2>A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.</h2><h2>Examples of Chemical Changes</h2><h2>Examples of Chemical ChangesBurning wood.</h2><h2>Examples of Chemical ChangesBurning wood.Souring milk.</h2><h2>Examples of Chemical ChangesBurning wood.Souring milk.</h2>
Explanation: because an Arrhenius acid is a compound that increases the H + ion concentration in aqueous solution. An Arrhenius base is a compound that increases the OH − ion concentration in aqueous solution.
