Titration Flashcards
What is a standard solution
A standard solution is one whose concentration is accurately known
Examples of standard solution
Na2CO3 , NaCl
What is a primary solution
A primary solution is a substance that can be directly weighed and use to make standard solution
What does primary solution must have
It must : be available in a pure and stable solid state , be soluble in water , have a high molecular mass, be anhydrous ( no water of crystallisation)
Equipments used in titrations
Pipette, burette, conical flask
What is pipette
Used to accurately measure a known volume of liquids / solutions. (25 ml)
Procedure for cleaning , filling and transferring solutions using a pipette
Rinse with deionised water , rinse with the solution it is to contain ( THIS IS DONE TO REMOVE THE WATER, SO THE SOLUTION IN TYE PIPETTE DOESN’T GET DILUTED ) , using a pipette filler, fill the pipette with solution until the bottom of the meniscus , reached the graduation mark, at eye level, let the pipette drain under gravity, touching the tip of pipette against the flask to remove the last drop stuck to the tip.
What is burette
Used to accurately measure the volume of liquids / solution added. ( 10ml)
Procedure for cleaning and filling a burette
Rinse with deionised water, rinse with the solution it is to contain (THIS IS DINE TO REMOVE THE WATER, SO THE SOLUTION IN THE BURETTE DOESN’T GET DILUTED) , clam vertically, using a funnel, fill the burette above the zero mark, remove the funnel , open the tap to bring the bottom of the meniscus to the zero mark, and to fill the jet below the tap.
What is conical flask
A specially shaped flask that allows swirling without spilling the contents.
Procedure for cleaning the conical flask
Clean with deionised water only. ( ANY WATER DROPLETS REMAINING WON’T CHANGE THE NUMBER OF MOLES OF REACTANT YOU ADD)
