Students are conducting an experiment to determine if sugars are present in foods. They heat a test tube containing a sugar solution in a beaker of water.

Which of these is an unsafe laboratory practice in this experiment?

A heating the sugar solution in a closed test tube
B rinsing hands with water after handling the materials
C using a test tube clamp to hold the test tube
D wearing safety goggles while heating the sugar solution

Question

Students are conducting an experiment to determine if sugars are present in foods. They heat a test tube containing a sugar solution in a beaker of water.

Which of these is an unsafe laboratory practice in this experiment?

 
  	A    	heating the sugar solution in a closed test tube
  	B    	rinsing hands with water after handling the materials
  	C    	using a test tube clamp to hold the test tube
  	D    	wearing safety goggles while heating the sugar solution

aaronq · Answer

if you heat a solution you elevate its vapour pressure, if the container is closed pressure will build inside which can cause it to explode.