DE_Chem_5.3.6-9

​DE_Chem_5.3.6_What Occurs during the Neutralization Process?

By NickBeth Meyer

​DE_Chem_5.3.7_What Are pH and pOH?

By NickBeth Meyer

​DE_Chem_5.3.8_What Is the Correlation between Logarithmic pH Scale Changes and Corresponding Changes in Concentration?

By NickBeth Meyer

• ​A low pH indicates a high concentration of hydronium ions.

• A high pH indicates a low concentration of hydronium ions.

​DE_Chem_5.3.9_How Is K_w (Water Dissociation Constant) Related to pH, pOH, Concentration of Hydrogen Ions, and Concentration of Hydroxide Ions?

By NickBeth Meyer

Water is an amphoteric substance.

• Amphoterism is the ability of a chemical to act as either an acid or a base.

• Whether an amphoteric chemical acts as an acid or base depends upon what other chemicals are present.

• Salts dissociate into component ions when placed in water, behaving similarly to acids and bases.

• The Ka and Kb values of the salt determine if it is more acidic or basic when dissolved in water.

• Kw can be calculated using the dissociation constants of the salt: Kw = Ka × Kb.

• Kw can also be calculated using the concentrations of hydrogen and hydroxide ions in the solution: Kw = [H+][OH–] = 1.0 x 10–14.