LO3 - Titrations

Question 1

Explain how an autotitrator works.

Answer 1

Add reagent / Titrant addition
In specific or small volumes
Increment size is determined by the nature of the titration
Reaction monitored using pH electrode/ potentiometer constantly measure pH
Titration of unknowns will measure volume of the titrant at the endpoint or equivalence point
Concentration of unknown calculated

Question 2

Why are autotitrators preferred rather than using an indicator?

Answer 2

Process is automated.
Faster once calibrated.
Not affected by coloured analytes.