;Contents: Water - its chemical nature; The three states of matter; Water and the engineer; Equilibrium product constants dissociation constants; Equilibrium constants solubility product constants; pH and hydrogen ion concentration; Acids and bases; Buffers; Oxidation-reduction reactions; Electrochemistry; Bacteria in water; Algae; The carbon cycle; The nitrogen cycle; The purification of water; Waste water treatment; Analyzing water. The objectives of the book is to present a minicourse of water chemistry designed to solve engineering and pollution problems for the conservationist, the legislator, the mining engineer, the agricultural engineer, the forester, the civil engineer and the municipal planning engineer.