we heated a hydrated salt in a crucible with the lid on and the water was supposed to evaporate out.
2007-09-11 14:05:23 · 4 answers · asked by ylai 2 in Science & Mathematics ➔ Chemistry
it will heat up faster with the lid on. its called convection the heat it will absorb will go out and then bounce back off the lid resulting in a much faster evaporation. the lid of the crucible doesnt seal so gasses can escape but the heat wont escape as fast
2007-09-11 14:09:55 · answer #1 · answered by AshleyNick H 3 · 0⤊ 0⤋
it will heat up faster with the lid on. its called convection the heat it will absorb will go out and then bounce back off the lid resulting in a much faster evaporation. the lid of the crucible doesn't seal so gasses can escape but the heat wont escape as fast
2013-12-21 04:17:24 · answer #2 · answered by Alia 1 · 0⤊ 0⤋
If you heat with the lid off, some boiling solution will spatter out, and you'll lose salt. When you weigh the crucible, you'll have less salt than you're supposed to.
2007-09-11 21:14:25 · answer #3 · answered by steve_geo1 7 · 0⤊ 0⤋
The water is associated with and actual surrounding the salt molecules.
Listen next time and you might hear a little crackle where a bunch of water molecule vaporized from the inside of a crystal. That would have lost you some of your product.
2007-09-11 21:10:44 · answer #4 · answered by Asclepius 3 · 0⤊ 0⤋