Question

Why is the empty crucible and cover fired to red heat?

A) to sterilize the porcelain
B) to reveal a hairline crack
C) to establish a constant weight
D) to develop proper laboratory technique

Answer 1

The empty crucible and cover are fired to red heat to develop proper laboratory technique.

Step-by-step explanation:

The empty crucible and cover are fired to red heat in order to develop proper laboratory technique. Heating the crucible to red heat helps to remove any impurities or moisture that may be present in the porcelain. It also helps to establish a constant weight by ensuring that any pre-existing weight of the crucible is accurately determined before it is used to measure the weight of substances being tested.