pre lab 4 Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDTY A clean, d KC

Question

pre lab 4 Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDTY A clean, d KCi is added to the crucible and the cracible is rewelghed Mass of crucible asd Mass of crucible, lid, and mixture 18.496 18.498 19.734 The crucible and mixture are heated for 15 minutes, then allowed to cool to room temperabure. Th crucible and residue are weighed and the mass is recorded. Mass of crucible, lid, and residue after 1" heating 19.476 g The crucible and residue are reheated for 5 m crucible and residue are weighed and the mass is recorded. - ras o tom temperat Mass of crucible, lid, and residue after 2nd reheating 19.368 g nd residue are reheated for 5 minutes, then allowed to cool to room temperature. The The crucible a crucible and residue are weighed and the mass is recorded. Mass of crucible, lid, and residue after 3l reheating 19369 g 1. Determine the mass of the mixture used in the experiment. .0 03103 C02 and 1zo

Explanation / Answer

Answer – We are given,

Mass of crucible + lid = 18.498 g

Mas of crucible + lid + mixture = 19.734 g

We need to calculate the mass of used mixture,

So the mass of used mixture = (Mas of crucible + lid + mixture) –( Mass of crucible + lid)

                                           = 19.734 g – 18.498

                                           = 1.236 g of mixture

So the mass of the mixture used in the experiment is 1.236 g

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