Why do you heat the empty crucible?1. To thermally decompose barium chloride dihydrate2. To prevent the water loss from barium chloride dihydrate3. To flame polish the crucible4. To prevent it from cr

Why do you heat the empty crucible?1. To thermally decompose barium chloride dihydrate2. To prevent the water loss from barium chloride dihydrate3. To flame polish the crucible4. To prevent it from cracking.5 to remove any absorbed material from the crucible