Titrations Titration Calculations Print 1, 3-5, 7-8

ACID + BASE  SALT + WATER Neutralization Reactions (REVIEW) Neutralization – rxn of acid and base making a salt and water ACID + BASE  SALT + WATER = HCl + NaOH  NaCl + HOH H2O

Titration The analytical technique used to calculate the moles in an unknown soln. mass % (g /gtotal) molarity (mol/L) molar mass (g/mol) buret titrant known vol. (V) known conc. (M) Safari Montage (2 min) Titration analyte known vol. (V) unknown conc. (M) (or moles)

equivalence point,(Veq): end point: indicator color change persists equivalence point,(Veq): equal stoichiometric amounts react completely HBr + NaOH  mol Acid = mol Base 2 HA + Ca(OH)2  H2SO4 + 2 KOH 

Titration Standard: solution of known conc. (M) Vanalyte (known) animation Standard: solution of known conc. (M) Vanalyte (known) Vtitrant (known) Animation (2 min): http://chem-ilp.net/labTechniques/TitrationAnimation.htm Mtitrant (known) Manalyte (unknown) 5

Pink in BASE Phenolphthalein Colorless in ACID

Quick Quiz! 1) When the moles of added titrant has completely reacted in equal stoichiometric amounts with the moles of analyte, you have reached the… A) titration point B) end point C) equivalence point D) neutralization point 7