[jubba]

We had to do the gravimetric determination of the sulfur content in a fertiliser as a practical task. (precipitation of barium sulfate)

For the task we had to fill in a risk assesment table.
Acetone was used to dry the barium sulfate faster. SInce its flammable I included it in the risk assesment.
However, the table only asked for "reagents" so we had to put barium nitrate/ and barium sulfate (which basically have no risks) but were penalised for putting acetone.

Is their anyway i can somehow argue that acetone is a reagent? 

[Donaldson Tan]

Does the fertiliser itself pose any hazard? It is after-all a mixture of a many components. There would be hazard signs (if there is) indicated on the label of the fertiliser container.

[mike]

Sounds ridiculous to be penalised for putting extra information. Usually a risk assessment covers every aspect of the experiment, including equipment, clean-up, waste disposal etc.

[jubba]

Does the fertiliser itself pose any hazard? It is after-all a mixture of a many components. There would be hazard signs (if there is) indicated on the label of the fertiliser container.

we didn't really use fertiliser we just used ammonia sulfate.

[Donaldson Tan]

I second Mike

[KyleDiLeo]

I also agree with what Mike said. At the end of our lab reports in our conclusions we usually wrote what could have contributed to error in the lab, and I definately would have instated the use of Acetone in the sources of error, especially if it was not fully dried, and still if it was fully dried. That's why I stopped using it to dry things, added to lab error in quantitative lab.