Understanding Fireworks and Flame Tests

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

• To cool down the flame

• To change the color of the flame

• To help vaporize the metal chloride formed

• To clean the nichrome wire

What color does sodium ion produce in a flame test?

• Red

• Lilac

• Blue

• Yellow

Which ion produces a lilac flame?

• Barium

• Strontium

• Potassium

• Calcium

What is the significance of cleaning the nichrome wire between each test?

• To cool the wire

• To change the wire's color

• To prevent contamination

• To make the wire stronger

Which ion is NOT a Group 1 or Group 2 metal ion?

• Calcium

• Sodium

• Potassium

• Copper

What happens to electrons when they are heated during a flame test?

• They become excited and jump to a higher energy level

• They turn into neutrons

• They split into protons

• They disappear

Tags

NGSS.HS-PS1-2

What is the result when electrons fall back to their original energy levels?

• They absorb light

• They create heat

• They produce sound

• They release energy in the form of light

Tags

NGSS.HS-PS1-2

NGSS.HS-PS4-3

Which ion produces a brick red flame?

• Strontium

• Barium

• Calcium

• Copper

What is the color of the flame produced by copper ions?

• Green

• Yellow-orange

• Lilac

• Light green

Which ion produces a red flame?

• Calcium

• Strontium

• Sodium

• Potassium