Evidence of a Chemical Reaction

This is a __________ change

Answer explanation

This is a chemical change because it results in the formation of new substances

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What are the starting substances (reactants) in this equation?

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Do the properties of the starting substances (or reactants) change?

• Yes

• No

• uhh, maybe?

Answer explanation

Yes, they combine to form water, which has different properties than hydrogen or oxygen.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Do the ending substances (or products) in this example have different properties after the change?

• Yes

• No

• Uhh, sure??

Answer explanation

Yes, water has different properties than any of the reactants.

Tags

NGSS.MS-PS1-2

What are the starting substances (reactants) in this equation?

• Two aqueous solutions   

• cloudy substance 

Tags

NGSS.MS-PS1-2

What is it called when a solid (clouds) form in a liquid?

• A color change

• A precipitate

• Temperature change

• Gas formation

Tags

NGSS.MS-PS1-2

When there is a precipitate formed in a solution it is evidence of__________.

• Rain

• A physical change

• A chemical reaction

• What's evidence?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the product in this reaction

• Magnesium

• Oxygen

• Magnesium Oxide

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this a balanced chemical reaction?

• No

• Yes

• What does balanced even mean?

• I really can't tell with this information.

Answer explanation

The mass of the reactants (80.6g) is equal to the mass of the product

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What part of the equation has a greater mass?

• Reactants

• Products

• Neither, they are both the same.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5