4 a) Is it OK to put a hot crucible on a balance as long as...
4
a) Is it OK to put a hot crucible on a balance as long as you don't touch the crucible with your fingers? True or False
b) The base of the Bunsen burner can be touched with your hand while the bunsen burner is lit? True or False
c) A good flame in a Bunsen burner has an inner blue cone? True or False
Homework Answers
Ans 4 :
a) False
It is not ok to put hot crucible on the balance even if it is not touched with the fingers. This is because the weight of hot crucible is slightly less than the colder one . So weighing the hotter crucible may cause discrepancies in the calculations.
b) True
The base of the burner can be touched when its lit because the base has air inlet due to which it is not very hot like barrel of the bunsen burner.
c) True
A good flame is the one that has an inner blue cone. The blue flame indicates that the fuel has been burnt efficiently.
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