Group 1 and 2 flame tests

Question 1

Lithium ions

Answer 1

Red

Question 2

Sodium ions

Answer 2

Orange/yellow

Question 3

Potassium ions

Answer 3

Lilac

Question 4

Rubidium ions

Answer 4

Red

Question 5

Caesium ions

Answer 5

Blue

Question 6

Calcium ions

Answer 6

Brick red

Question 7

Strontium ions

Answer 7

Crimson

Question 8

Barium ions

Answer 8

Green

Question 9

Step 1 of carrying out a flame test

Answer 9

Sterilise a nichrome wire in concentrated HCl and hold over hottest part of the Bunsen burner flame

Question 10

Step 2 of carrying out a flame test

Answer 10

Dip the wire in HCl then in the metal compound you are testing so it sticks to the wire

Question 11

Step 3 of carrying out a flame test

Answer 11

Hold this in hottest part of the flame and observe the colour produced

Question 12

What happens when an ion absorbs energy from the Bunsen burner?

Answer 12

Caused electrons to move onto higher energy levels because they are in excited state

Question 13

What happens when an electron falls back to its ground state (lower energy level)?

Answer 13

It releases the energy it absorbed in the form of a wavelength which is visible light

Question 14

What determines the colour observed in a flame test?

Answer 14

The wavelength of light wave the electron omitted