Unit 14 – Acid, Bases, & Salts Titrations Titration Calculations Print 1, 3-5, 7-8

ACID + BASE  SALT + WATER Neutralization Reactions (REVIEW) Neutralization – chemical reaction between an acid and a base. HCl + NaOH  NaCl + HOH H2O = ACID + BASE  SALT + WATER

A. Titration Titration Standard Solution adding a known conc. to a solution to find an unknown conc. Standard Solution solution of known conc.

A. Titration Equivalence Point moles of H+ = moles of OH–

A. Titration

A. Titration End Point indicator permanently changes color

A. Titration Phenolphthalein

Acid/Base Indicators

MAVA = MBVB B. Calculations Example (find conc.) A 25.0 mL solution of HCl was completely neutralized by 40.0 mL of standard 0.100 M NaOH. What is the concentration of the HCl? MA x (25.0 mL) = (0.100 M) x (40.0 mL) MA = (40.0 mL) x (0.100 M) = (25.0 mL) 0.160 M HCl

MAVA = MBVB B. Calculations Example (find conc.) A 20.4 mL solution of KOH was completely neutralized by 48.5 mL of 0.150 M HNO3. What is the concentration of the KOH? (0.150 M) x (48.5 mL) = MB x (20.4 mL) (0.150 M) x (48.5 mL) = MB = (20.4 mL) 0.357 M KOH

Quick Quiz! 1) When the moles of acid equals the moles of base you have reached the… A) titration point B) end point C) equivalence point D) neutralization point 11

Quick Quiz. 2) The solution of known concentration is called the … A) titrant B) standard C) calculated D) indicator 12