chemistry

Volumetric analysis

Define volumetric analysis

Va is the versatile form of quantitive chemical analysis. the purpose is to use An accurately known volume and conc of one sol to find the accurate conc of 2nd sol

tools used in va

conical flask

Burette

pipette

retort stand

white tile

types of titrations

acid-base

complexometric

redox

precipitation

Analyte

substance being analysed

titrant

solution in the burette

moles formula

mass/molar mass

what is molarity

the conc of a solution in moles/litre (dm-3)

1dm-3 = ?

1000cm3

what is a titration

a procedure that measures the vol of one reagent required to react with a measured mass or vol or another reagent.

what’s a titration used for

to determine the amount of acid/base present in a sample

why is an indicator used?

to signal the endpoint, when the stoichiometric amounts of acid and base are present

function of a burette?

used to deliver the titrant into an erlenmeyer (conical) flask

define titration

an analytical procedure whereby we react a known volume of solution of known conc with a vol of a sol of unknown conc.

chemical formula of titration

define standard solution

sol of known conc

define primary standard

a standard sol which has been prepared by accurately weighing out a pure compound and using it to make a solution of known volume (made in vol flask)

define secondary standard

a solution standardised against a primary standard