unit 4 - how to pass: gravimetric analysis Flashcards
1
Q
What can gravimetric analysis be used for?
A
To determine the mass of an element or compound in a substance.
2
Q
What is the substance converted into?
A
Another substance of known chemical composition, which can be readily isolated and purified.
3
Q
How can the conversion occur?
A
Through precipitation or volatilisation.
4
Q
In precipitation conversion, what happens to the precipitate?
A
It is separated from the filtrate and the filtrate tested to ensure the reaction has gone to completion. It is washed, dried to constant mass and then weighed.
5
Q
In volatilisation conversion, what happens to the substance?
A
It is heated and any volatile products, often water, are evaporated. The substance is heated to constant mass and the final mass recorded.
