CHEM 110 Lecture Notes - Lecture 18: Spectator Ion, Chemical Equation, Strong Electrolyte
Document Summary
Demo- pillar of salt: supersaturated solution -> saturated solution, crystallization of excess salt, exothermic process. Like dissolves like , if intermolecular forces broken and formed are similar, dissolution is probable. Solubility increases as temperature increases for solid. Solubility decreases as temperature increases for gas. Pressure dies not have any effect on the solubility of solid or liquid. The amount of gas dissolved (cg) is proportional to the partial pressure of that gas (pg) above the solution. Patterns of reactivity- ways of keeping reactions organized. Combustion reactions: add o2, form co2 and h2o combination reactions decomposition reactions. Formation of a precipitate- change partners formation of weak or non electrolyte- change partners (cation and anion) Steps for net ionic equation: write the balanced molecular equation, dissociate all soluble strong electrolytes to write the complete ionic equation. 3. identify spectator ions(same ions on both sides, cross off: eliminate all spectator ions to get net ionic equation.
