Balancing chemical reactions

Label the reactants and products in the chemical equation shown.

a

b

Reactants

Products

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NGSS.MS-PS1-2

NGSS.MS-PS1-1

Click on the products coefficient.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-1

• 2W
• F
• H
• 2P

In this reaction the products have ​ (a)   ​ Iron (Fe) and ​ (b)   oxygen (O)

• 4
• 8
• 2
• 6
• 10

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Let's help Sam and Jamie figure out the chemistry of acetic acid (the substance that gives vinegar its sour taste). Look at the model of acetic acid and count how many of each type of atom are in this molecule.

Number of C (carbon): (a)  

Number of H (hydrogen): (b)  

Number of O (oxygen): (c)  

• 2

• 4

• 2

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NGSS.MS-PS1-1

Please drag the coefficients to the proper location for this equation will be balanced.

c

b

4

2

1

3

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NGSS.MS-PS1-5

Which balanced equation represents a reaction that involves 6 atoms of Oxygen?

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NGSS.MS-PS1-5

NGSS.MS-PS1-1

Balance this equation:

​ (a)   Fe + ​ (b)   O₂ --> ​ (c)   Fe₂O₃

• 4
• 3
• 2
• 1
• 0

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance the chemical equation by adding the correct coefficients.

a

b

2

4

3

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The table below shows two reactions and their products.

Potassium superoxide, KO2, reacts with water to produce oxygen, as represented in balanced equation 3 below.

Equation 3: 2KO₂(s) + 2H₂O(l) → 2KOH(s) + O₂(g) + H₂O₂(aq)

The decomposition of calcium carbonate, CaCO3, produces lime and carbon dioxide gas, as shown in unbalanced equation 4 below.

Equation 4: CaCO₃(s) + heat → CaO(s) + CO₂(g)

Balance equation 4 for the decomposition of CaCO₃(s), using smallest whole-number coefficients.

​ (a)   CaCO₃(s) + heat → ​ (b)   CaO(s) + ​ (c)   CO₂(g).

• 2

• 1

• 3

• 4

• 5

• 6

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NGSS.MS-PS1-2

NGSS.MS-PS1-5