What is a flame test used for?

2 Answers


Identifying Ions


When an Ion gets heated it gains energy. The Ion of #Na^(+1)# has an orange glow in a flame. The Ion of #K^(+1# has a lavender glow. By using a flame test a chemist could identify whether he has a #NaCl# or if he has #KCl#. The color of some flame tests may vary slightly depending on the temperature of the flame being used.

Here are some videos of flame tests-

  1. Using solutions of dissolved metal chloride salts.

  2. Using solid metal chloride salt samples.

Hope this helps!

Apr 11, 2016

Flame test can also be used to check the which gas either oxygen or hydrogen is being released from the solution.Oxygen relights a glowing splint and hydrogen burns in a flame with a pop sound.