Flame Tests

What colour does lithium produce in a flame test?

• Yellow

• Crimson

• Blue-green

• Brick red

Which metal ion produces a yellow/orange flame?

• Sodium

• Copper

• Potassium

• Calcium

What is the first step in performing a flame test?

• Dip the loop into the sample

• Make a small loop in the end of a clean nichrome wire

• Hold the loop in a blue Bunsen flame

• Record the colour observed

What colour does potassium produce in a flame test?

• Lilac

• Blue-green

• Brick red

• Crimson

Which metal ion produces a blue-green flame?

• Calcium

• Copper

• Lithium

• Sodium

What is the purpose of using concentrated hydrochloric acid in a flame test?

• To clean the nichrome wire

• To change the flame colour

• To make the flame hotter

• To cool down the sample

What colour does calcium produce in a flame test?

• Yellow

• Lilac

• Brick red

• Blue-green

Which metal ion is identified by a lilac flame?

• Sodium

• Potassium

• Copper

• Calcium

What should you do after dipping the loop into the sample?

• Dip it into hydrochloric acid again

• Hold the loop in a blue Bunsen flame

• Make a new loop

• Record the colour observed

What is the main use of a flame test?

• To measure temperature

• To identify metal cations in a sample

• To clean metal samples

• To heat up substances