Flame Test Lab

What was the identity of the unknown substance?

• LiCl

• CaCl₂

• NaCl

• BaCl₂

• SrCl₂

The taste of each substance is an example of what type of property?

• Physical

• Chemical

The mass of each substance would be an example of what type of property?

• Physical

• Chemical

Tags

NGSS.MS-PS1-5

Which option below best describes the substances in each tray?

• Pure substance - element

• Pure substance - compound

• Mixture of element & compound

• Mixture of elements

Why is it necessary to put the elements in the fire in order to see their colors?

• To excite their electrons, causing them to emit characteristic colors.

• The fire burns the splint.

• Elements change color due to chemical reactions with the air.
• The colors are visible due to the heat of the fire.

Tags

NGSS.MS-PS3-5

If you mixed two random trays of substances from this lab together, which of the following options might represent that mixture?

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Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which block model could represent SrCl₂?

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• 
• 
• 

Tags

NGSS.MS-PS1-1

Which block model could represent Na₂SO₄?

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• 
• 
• 

Tags

NGSS.MS-PS1-1

A fellow student of yours thought that flame color was based on the element written at the beginning of the compound. Which statement would give evidence to support their claim?

• The flames of LiCl and and NaCl are the same color

• The flames of LiCl and NaCl are different colors

• The flames of Na₂SO₄ and NaCl are different colors

• The flames of Na₂SO₄ and CuCl₂ are different colors

A fellow student of yours thought that flame color was based on the element written at the end of the compound. Which statement would give evidence to support their claim?

• The flames of LiCl and and NaCl are the same color

• The flames of LiCl and NaCl are different colors

• The flames of Na₂SO₄ and NaCl are different colors

• The flames of Na₂SO₄ and CuCl₂ are different colors