Chemistry

Volumetric Analysis 1
To make a measurement solution of sodium change
Introduction
A commonplace solution is one whose concentration is known exactly. exemplification solutions of liquids, for recitation acids, are easy to prepare and are usually supplied. Standard solutions of solids can be prepared by weighing a mass of solid, and dissolving it in a known mass of solution in a volumetrical flask. Today, you are red ink to prepare a standard solution of sodium carbonate to use later in another practical.
Apparatus



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Bench mat
100 cm3 beaker
250 cm3 beaker
250 cm3 volumetric flask with showstopper
Filter funnel
Glass rod
Teat pipette
Spatula
Label
De-ionised water supply
Anhydrous sodium carbonate, Na2CO3(s) Copyright © Nigel Saunders N-ch1-35


Methods
check through the Methods. capture a suitable blank results table, polish off with units in the headings.

1. employ the ± 0.1g balance, weigh approximately between 1.2g and 1.4g of sodium carbonate into the small beaker. Do not record the mass.
2. Using the ± 0.01g balance, weigh the small beaker and its confine accurately.
Record this mass.
3. Transfer the contents of the small beaker into the large beaker.
Weigh the small beaker again utilize the ± 0.01g balance.
Record this mass.




The difference between the two accurate battalion is the mass of sodium carbonate in your beaker.
4. Add de-ionised water cautiously down the side of the large beaker.
Use round 150cm3 of water, and swirl the beaker to mix the contents.
5. Stir using a applesauce rod to dissolve the solid completely.
6. Transfer the solution into the volumetric flask using the funnel.
Remember: pour down the trash rod;
remove the last drop of solution from the film over rod onto the funnel.
Wash the beaker, rod and funnel several quantify using de-ionised water from the wash bottle, letting the washings go into the flask.
7. Make up to the mark on the volumetric flask with de-ionised water.
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