What are each of the different coloured flames used for on a Bunsen burner?

Answer 1

• Yellow safety flame - Safe becasue you can see it easily and know it is there. Not used for heating because it creates soot.
• Silent blue flame - Used to for gental heating and is silent and not very visible.
• Roaring blue flame - Strongest heating setting and is made of two cones. The outside cone is the flame and it is blue , the inside cone is unburned gas that is purple.

All credit goes to another user to wrote this on a different conversation.

Answer 2

There are two flames, a orange flame(sometimes called a safety flame) and a blue flame(sometimes called a heating flame).The orange flame is clearly visible and can be seen to indicate the Bunsen burner is switched on. it burns at a low temperature because of the lack of oxygen that is fed to the Bunsen burner.The blue flame is a hotter flame because of it's rich supply of oxygen however the flame isn't very easy to see.

Answer 3

The blue inner cone of a Bunsen burner flame is the hottest and is used for heating and sterilizing. The yellow outer flame is cooler and is used for general heating and melting. The orange tip of the flame is the least hot and is used for heating larger objects evenly.

Answer 4

flames on a Bunsen burner are usually used to heat the chemical(s) in a test tube.