Titration of Acid using a PH meter Flashcards
what is a pH meter
an instrument used to measure the pH of a solution
what provides a direct method of obtaining a titration curve
pH meter
what is a titration curve
a graph of measured pH values verses the volume (mm) of the titrant added
how is the volume of one reagent needed to EXACTLY react with the other reagent measured
using a burette
what is a titration
a technique where a solution of known concentration is used to determine the concentration of an unknown solution
what is the analyte
the substance that is being analyzed (what was in the flask)
what is the titrant
the substance that is being used to analyze the analyte (what is run through the burette)
what was the titrant of this experiment
NaOH
what was the analyte of this experiment
the unknown acid
what is the equivalence point
the point where an equal amount (number of moles) of base has been added to the amount of acid present
where can the equivalence point be found on a titration curve
there is a relatively LARGE change in pH with a relatively SMALL change in volume
what is a monoprotic acid
acids that only have 1 acidic H to give up to the NaOH
what is the generalized formula for monoprotic acids
HA
how many equivalence points does a monoprotic acid have
1
how many equivalence points does a polyprotic acid have
more than 1
what is a polyprotic acid
acids that have more than 1 acidic H to give up to the NaOH
what is the generic formula for a diprotic acid
H2A
what is a diprotic acid
an acid that has 2 acidic Hs to give up to the NaOH