Question

3) Give two reasons why a medium blue flame is used for heating to dryness.

Answer 1

Answer:

It does not produce much soot but is not as high energy as the roaring blue flame, therefore the liquid heats more evenly and you get less 'spitting'. A test tube of liquid should be constantly moved through the flame so that the liquid is evenly heated - small pockets of very hot liquid can evaporate

Hope it helps u !!