Gravimetric analysis

[mandy]

Alright, thanks guys.

[longy1991]

When you crush the maxi sweet tablets and make them up in solution, they WILL contain insoluble materials. As we end up weighing a precipitate, we can't have the weight of other insolubilities contributing to our precipitate mass. This would make our results very inaccurate. That's why you have to filter it .

[appianway]

I think it also presumes that no other materials in the substance are soluble and react with the barium chloride to form a precipitate.

[longy1991]

of course, coz many chlorides are insoluble and it is very unlikely that there would be no chlorides formed from the addition. However, that is not the question bro.

[appianway]

It's not the question, but it'd definitely add the the uncertainty of any calculations involving the amount of saccharin based on the mass of the precipitate as the other insoluble compounds would contribute to the mass of the precipitate.

[longy1991]

it is unnecessary to point out the poor assumptions needed to carry out vce chemistry in a question lol. It's a waste of space unless specifically asked for.

[appianway]

It's unnecessary for this question, but it's probably better to at least be aware of what you're actually doing. I guess it has relevance if you're designing your own practical.

[longy1991]

i agree.