Flame Test Pre-Lab

What are the three reagents traditionally used to make gunpowder for fireworks?

• Potassium nitrate, carbon, sulfur

• Potassium carbonate, carbon, sulfur

• Potassium sulfate, carbon, sulfur

• Potassium nitrate, carbon dioxide, sulfur

Tags

NGSS.MS-PS1-2

What is the state of the material after the explosion in fireworks?

• Super-heated

• Super-cooled

• Solidified

• Dissolved

Tags

NGSS.MS-PS1-4

What is the result of the combustion reaction in fireworks?

• Solid potassium carbonate and potassium sulfate, nitrogen gas, and carbon dioxide gas

• Liquid potassium carbonate and potassium sulfate, nitrogen gas, and carbon dioxide gas

• Solid potassium nitrate and potassium sulfate, nitrogen gas, and carbon dioxide gas

• Liquid potassium nitrate and potassium sulfate, nitrogen gas, and carbon dioxide gas

What is the role of the binder in a firework?

• To provide energy

• To make the mixture stable

• To produce light

• To receive electrons

What is a flame test used for?

• To measure the temperature of a flame

• To test for the presence of certain metals in chemical compounds

• To determine the amount of fuel in a firework

• To test the stability of a binder

What happens to metal ions when they are heated in a flame during a flame test?

• They turn into gas

• They emit light and produce a characteristic color

• They become liquid

• They lose electrons

Why is it difficult to determine the exact ion or concentration of the ion in a compound using a flame test?

• Because the flame is too hot

• Because some colors are produced by several different metals

• Because the binder interferes with the test

• Because the fuel burns too quickly

What is the role of the oxidizer in a firework?

• To store energy

• To receive electrons and release energy

• To hold everything together

• To provide color

What happens to electrons in metals as we move down the periodic table?

• They become less reactive

• They emit less light

• They are distributed in higher energy levels

• They lose their color

Tags

NGSS.HS-PS1-1

Why might some colors in a flame test be easily overpowered by stronger colors?

• Because the flame is too hot

• Because the metal ions are too weak

• Because some colors are very weak

• Because the binder is too strong