Solid silicon dioxide, often called silica, reacts with hydrofluoric acid (HF) solution to produce the gas silicon tetrafluoride and water. a. Write the balanced chemical equation for the reaction. b. List three mole ratios, and explain how you would use them in stoichiometric calculations.
Phase Changes States of Matter ● Solid locked into place by electrostatic forces ● Liquid strength of IMF determines properties ○ IMF= InterMolecular Forces ● Gas ○ Idealcompletely free until it collides w/ no lose in energy ○ Real dispersion forces influence other molecules ■ Close to one another at higher temp and low pressure Phase Changes ● Fusion = Solid to Liquid ● Vaporization= Liquid to Gas ● Crystallization= Liquid to Solid ● Condensation= Gas to Liquid ● Sublimation= Solid to Gas ● Deposition= Gas to Solid Types of Solids ● Amorphous arbitrary arrangement w/ weak IMF ● Crystalline defined shape, strong IMF ● Crystal Lattice arrangement of a Crystalline ● Unit Cell repetition of a
