CHM 113 Lecture 7: Chapter 4 Aqueous Reactions and Solution Stoichiometry
Document Summary
Most chemical reactions take place in aqueous media(water) Homogenous mixtures of substances in water are called solutions. The chemicals dissolved in the water are solutes. Solutes that form aqueous solutions that contain ions are called electrolytes(these solutions conduct electricity) Ions separate in aqueous solution (ions become surrounded by water molecules (opposite charges attract) Like things dissolve like things (polar dissolve polar) Strong electrolytes ionize completely (or nearly so) in solution. A few molecular (strongly acidic) compounds (like hcl) Dissolving in water and dissociating are not the same. Vinegar is a weak electrolyte, but is very water soluble. Some ionic compounds are not very soluble, for example, ba(oh)2. Hcooh (aq) h+aq) + hcoo-(aq) (the double arrow heads above are only half heads) They mean the it isn"t a complete dissociation and we find some equilibrium. Answer: ch3ch2oh because it is molecular and not ionic.
