Weigh a clean dry weighing boat.
Place weighing boat on the pan of a digital balance and place the mass in the weighing boat using a spatula. Record the mass.
Pour the contents into the weighing boat and re-weigh the weighing boat to calculate the precise mass transferred.
Add approximately 100cm3 of deionised water to the beaker containing the solid and use a glass rod to stir the contents until the solid has dissolved.
Using a funnel, pour the contents of the beaker into a volumetric flask and then use the wash bottle to rinse the beaker, funnel and glass rod into the volumetric flask.
Make the volumetric flask up to the graduated mark by carefully adding deionised water from the wash bottle.
Use a teat pipette to add the final drops to ensure that the bottom of the meniscus is on the line.
Stopper the volumetric flask and shake the contents.
Use the mass used and the volume to work out the conentration of the solution.

	Criado por Megan Trevor quase 8 anos atrás

Methods for required practicals in the A Level spec, mainly useful for paper 3

Required Practicals - AQA A Level Chemistry