Precipitation Titrations

Question 1

Mohr’s method

Answer 1

Used for detecting conc of halides. Uses AgNO3 as titrant and chromate as indicator. Constant mL of indicator. pH between 6-9 to not form compounds. Blank titration requires

Question 2

Volhard’s method

Answer 2

Back titration of acidic solution. A known excess of AgNO3 is added to ppte all titrand. KSCN is used as titrant. Fe3+ is the indicator to produce red FeSCN at end point.