Flame Test Color Identification

This video tutorial explains how to perform flame tests to identify metal ions. It covers the use of nichrome wire and wooden splints for testing, and demonstrates the flame colors for lithium, sodium, potassium, and copper ions. The video emphasizes that metal compounds, not pure metals, are used in these tests.

What is the purpose of using concentrated HCl in flame tests?

• To add color to the flame

• To react with the metal ions

• To remove impurities from the wire

• To cool down the wire

Why does the instructor use wooden splints instead of nichrome wire in the video?

• Because wooden splints are cheaper

• Because it is tricky to get enough metal ions on nichrome wire

• Because wooden splints give a better flame color

• Because nichrome wire is not available

What color does lithium ion produce in a flame test?

• Lilac

• Strong red

• Blue-green

• Bright yellow

Which compound is used to test for lithium ions in the video?

• Lithium carbonate

• Lithium chloride

• Lithium nitrate

• Lithium sulfate

What is the flame color observed for sodium ions?

• Lilac

• Blue-green

• Bright yellow

• Strong red

Which statement is true about the sodium ion flame test?

• Sodium ions produce a pale purple flame

• The chloride ion affects the flame color

• Sodium ions produce one of the most intense flame colors

• Sodium ions do not produce any color

What color does potassium ion produce in a flame test?

• Lilac

• Strong red

• Blue-green

• Bright yellow

Why is the potassium ion flame color difficult to see?

• Because it is not visible in daylight

• Because it is a very dark color

• Because it is a very pale purple

• Because it is very bright

What color does copper ion produce in a flame test?

• Blue-green

• Lilac

• Bright yellow

• Strong red

What is being tested in the flame tests shown in the video?

• Pure metals

• Gases

• Metal compounds

• Non-metal compounds