Flame Test

Which of these is a required safety rule for the flame test lab?

• tie long hair back

• wear goggles

• do not reach across the lab bench

• all of these are required

Consider the following data:

Cu - blue, green, teal

Na - yellow-orange

K - yellow, orange, pink/lavender

Li - red, light red

Sr - deep red

If the unknown color was yellow-orange, which element is most likely the unknown?

• Cu

• Na

• K

• Li

If the unknown color was yellow,orange with some pink, which element is most likely the unknown?

• Cu

• Na

• K

• Li

What should you do if the splint catches on fire during the flame test?

• Continue moving the splint through the flame

• Stop and blow out the flame

• Turn off the gas spigot

• Place the splint in the waste beaker

Tags

NGSS.HS-ETS1-3

What should you do if you need to determine which metal ions are present in the unknown solution?

• Ask the teacher for the answer

• Skip the unknown solution and move on to the next experiment

• Perform a flame test and compare the data to previous data

• Use the same data from the known solutions

What color was the lithium in the flame test?

• Red/Orange

• Blue

• Lavender/Purple

• Green

Explain what was occuring during the flame test that caused the flame change colors.

• The electrons gained energy and moved to an excited state.

• The electrons gained energy and moved to an ground state.

• The electrons released energy and moved to a ground state.

• The electrons released energy and moved to an excited state.

Tags

NGSS.HS-PS1-4

What color flame does copper produce?

• Lavender/Purple

• Red/Orange

• Green

• Magenta

What particles in the heated compounds are responsible for the production of the colored light?

• proton

• neutron

• electron

• proton and neutron

Tags

NGSS.HS-PS1-2

Copper produces a _______ flame.

• red

• orange

• yellow

• blue/green