Balancing Chemical Equations

In a _____________, one or more substance (reactants) change/converted into one or more different substance (products).

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NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

These are the materials you start a reaction with. They are written on the left side of the arrow.

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NGSS.MS-PS1-5

These are the materials that are formed in a reaction. They are written on the right side of the arrow.

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NGSS.MS-PS1-2

It states that mass is neither created nor destroyed in any chemical reaction.

• Law of Conservation of Mass

• Law of Conservation of Energy

• Law of Conservation of Reaction

• Law of Chemical Destruction

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NGSS.MS-PS1-5

The principle of the Conservation of Mass means that a chemical equation must be balanced.

This implies that

• The number of atoms in the Reactants must equal the number of atoms in the Products.

• The chemical formula of the Reactants must be the same as chemical formula of the Products.

• The structure of the Reactants must be the same as structure of the Products.

• The physical properties of the Reactants must be the same as physical properties of the Products.

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NGSS.MS-PS1-5

Balance the equation. What coefficient must be placed to balance the equation?

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance the equation. What coefficient must be placed to balance the equation?

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance the equation. What coefficient must be placed to balance the equation?

• 2 and 3

• 2 and 2

• 3 and 2

• 3 and 3

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance the equation. What coefficients must be placed to balance the equation?

• 3, 2, 2

• 2, 3, 2

• 4, 2, 2

• 2, 4, 2

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance the equation. What coefficients must be placed to balance the equation?

• 3, 2

• 2, 3

• 4, 2

• 2, 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5