Exploring the Conservation of Mass in Chemical Reactions

The video tutorial explains the properties of steel wool, primarily composed of iron, and its reaction with vinegar and oxygen. The process demonstrates the law of conservation of mass, as the mass remains unchanged despite the chemical reaction. The reaction results in the formation of iron oxide, commonly known as rust, which is characterized by a color change and brittleness.

What is the primary element that steel wool is made of?

• Zinc

• Aluminum

• Iron

• Copper

Which of the following is NOT a property of steel wool?

• Very thin fibers

• Gray metallic color

• Rough surface

• Smooth surface

What does vinegar do to the steel wool?

• Makes it shiny

• Strips away some of the wax

• Covers it with wax

• Turns it into powder

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Why is the balloon sucked into the flask?

• The balloon is deflated

• The flask is cooled

• Oxygen is used up in a chemical reaction

• The flask is heated

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NGSS.MS-PS2-5

What does the law of conservation of mass state?

• Mass is destroyed during a chemical reaction

• Mass is created during a chemical reaction

• Mass changes form during a chemical reaction

• Mass is neither created nor destroyed

Tags

NGSS.MS-PS1-5

What evidence shows that a chemical reaction occurred with the steel wool?

• The steel wool melted

• The balloon was sucked into the flask

• The steel wool turned into liquid

• The steel wool expanded

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NGSS.MS-PS1-2

What is the new color of the steel wool after the reaction?

• Blue

• Gray

• Green

• Brownish reddish

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NGSS.MS-PS1-2

What is the product formed in the chemical reaction with steel wool?

• Iron nitrate

• Iron chloride

• Iron oxide

• Iron sulfate

What is another name for iron oxide?

• Corrosion

• Tarnish

• Patina

• Rust

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What happens to the steel wool's properties after the reaction?

• It becomes shiny and smooth

• It becomes liquid

• It becomes brittle and powdery

• It becomes flexible and strong

Tags

NGSS.MS-PS1-2