4.5 Acid and Base

I can use the pH scale to classify substances in solution as acids, bases or neutral.

Study Guide

Explain each concept

è Ionic compounds are composed of oppositely charged ions arranged in a crystal lattice.

è Ionic compounds tend to be brittle, have high melting points.

è Ionic compounds dissolve in water to form solutions that conduct an electric current.

è An acid is a compound that increases the number of hydrogen ions in solution.

è A base is a compound that increases the number of hydroxide ions in solution.

è pH is a measure of hydronium ion concentration in a solution.

è Combine an acid and a base to neutralize one another to produce water and a salt.

è Acids react with certain substances to produce gases.

è Litmus paper changes colors with acids and bases.

è Acids and bases have different tastes and physical characteristics.