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Chemical Reactions, Equations,  and Conservation of Mass

Chemical Reactions, Equations, and Conservation of Mass

Assessment

Presentation

•

Physics

•

9th - 12th Grade

•

Medium

•
NGSS
MS-PS1-5, MS-PS1-2, MS-PS1-1

+3

Standards-aligned

Created by

Sherri Christensen

Used 1+ times

FREE Resource

45 Slides • 24 Questions

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Chemical Reactions, Chemical Equations and Conservation of Mass

2

Match

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Match the following

Physical Change

Chemical change

Chemical Change

Physical Change

Chemical change

3

Dropdown

​
change occurs when a substance changes in appearance, such as dissolving. ​



A ​ ​
change occurs when a new substance is formed, with evidence being precipitate formation.

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Labeling

Label the parts of the reaction.

Drag labels to their correct position on the image

Products

Reactants

20

Labeling

Label the reactants and products in the chemical equation shown.

Drag labels to their correct position on the image

Products

Reactants

21

Categorize

Options (4)

CO2

H2O

O2

C10H22

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In the equation pictured here, which substances are products? Which are reactants?

Products
Reactants

22

Multiple Choice

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In this image, what are the information to the right of the arrow (in black) is called the_______.
1
Product
2
Reactant
3
Chemical Subscript

23

Multiple Choice

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The reactants in the image above are:

1

CH4 and 2 O2

2

2 H2O and CO2

3

All of these are reactants

4

All of these are products

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Multiple Choice

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The number and type of atoms on each side of a chemical equations must be

1

equal

2

different

3

doubled

4

tripled

31

Multiple Choice

A sealed test tube containing 8 grams of iron filings and 5 grams of sulfur is heated until the material in the test tube glows bright red.  What is the mass of products? 
1
Mass is less than 13 grams
2
Mass is equal to 13 grams
3
Mass is greater than 13 grams
4
Mass cannot be measured

32

Multiple Choice

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Does this equation follow the law of conservation of mass?

1

Yes, because the mass is the same.

2

Yes, because the mass is not the same.

3

No, because the mass is the same.

4

No, because the mass is not the same.

33

Multiple Choice

What does the Law of Conservation of Mass state?

1

Matter is created and destroyed in a chemical reaction.

2

Matter is neither created nor destroyed, just transferred.

3

Matter is only destroyed in a chemical reaction.

4

Matter can be transformed into energy.

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Dropdown

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

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Drag and Drop

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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):


Number of H (hydrogen):


Number of O (oxygen):
Drag these tiles and drop them in the correct blank above
2
4

2

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Labeling

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

Drag labels to their correct position on the image

3

4

1

2

60

Hotspot

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

61

Drag and Drop

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Two solutions are mixed and react to produce the solid precipitate AgCl. The chemical reaction is shown below. According to the Law of Conservation of Mass, what happens to the TOTAL mass as the reaction takes place?



The mass will ​
.
Drag these tiles and drop them in the correct blank above
remain constant
increase
decrease
first decrease and then increase

62

Labeling

Balance the chemical equation by adding the correct coefficients.

Drag labels to their correct position on the image

2

3

4

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Drag and Drop

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The following reaction is NOT balanced. Only ​
requires a coefficient of​ 2 . ​
Drag these tiles and drop them in the correct blank above
HCl
CuS
1
4

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Multiple Choice

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The blue numbers in the image below represent ________

1

solvents

2

coefficients

3

subscripts

4

elements

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Multiple Choice

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Does this equation demonstrate the law of conservation of mass?

1

Yes, reactants equal products

2

No, reactants do NOT equal products

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Dropdown

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What is the coefficient or number of moles for each molecule shown in the equation. ​
CH4 , ​
O2 , ​
CO2​ , ​
H2O

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Multiple Choice

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How many hydrogen atoms are on the product side of the balanced chemical equation?

2C2H6 + 7O2 --> 4CO2 + 6H2O

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2

2

4

3

8

4

12

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Multiple Choice

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The numbers needed to balance the equation are:
1
2, 7, 6, 4
2
2, 3, 2, 6
3
4, 3, 1, 12
4
1, 6, 2, 6

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Poll

How confident do you feel about this topic now?

Very confident
Somewhat confident
Not confident
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Chemical Reactions, Chemical Equations and Conservation of Mass

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