This document discusses acids and bases, distinguishing between strong and weak acids/bases as well as concentrated and dilute solutions. Strong acids and bases fully dissociate in water, while weak ones only partially dissociate. Concentrated solutions have high amounts of solute per liter, while dilute solutions have low amounts. Common strong acids and bases are listed. Strong acids/bases have more extreme pH values and higher conductivity than weak ones when at the same molarity. Acidic and basic salts can form depending on if the salt is made from a strong acid/weak base or strong base/weak acid. Neutral salts form from strong acids and bases.