Flame Test Colors

What color does lithium produce in a flame test?

• Red

• Green

• Orange

• Blue

Which metal ion is identified by a purple or lilac flame color?

• Sodium

• Potassium

• Calcium

• Copper

Why are flame tests useful in chemistry?

• To determine the pH level of a substance

• To identify the presence of certain metal ions

• To measure the boiling point of a substance

• To observe the viscosity of liquids

What safety precaution should be taken when performing a flame test?

• Use a high-powered microscope

• Wear thermal gloves

• Work in a well-ventilated area

• All of the above

If a flame test produces a blue-green color, which metal ion could be present?

• Sodium

• Barium

• Strontium

• Copper

What is the purpose of using a platinum or nichrome wire during flame tests?

• To prevent chemical reactions with the sample

• To increase the temperature of the flame

• To add color to the flame

• To make the flame visible in daylight

What color flame does calcium produce in a flame test?

• Yellow-green

• Red-orange

• Blue-green

• Purple

Which of the following is an important safety precaution to observe during a flame test?

• Always add water to the sample before testing

• Perform the test in a dark room

• Wear safety goggles and a lab coat

• Use a plastic spatula to handle chemicals

How can flame test results be used to support the identification of an unknown substance?

• By comparing the flame color to a known standard

• By measuring the temperature of the flame

• By determining the weight of the ash residue

• By testing the substance's solubility in water