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Lesson 8: Balancing Chemical Equations

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Last updated over 2 years ago
35 questions
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Balancing Chemical Equations

Objectives: Students will...
  • balance chemical equations.
As you complete this assignment, please take notes in a notebook when watching the attached videos.
Question 1
1.

Chemical equations are balanced using coefficients. You cannot change a subscript to balance a chemical equation.

Determine the number of atoms of each type of element present in five of the following molecules: Ba(NO3)2

Question 2
2.

Following along with your teacher, click on the 'show your work' box below and balance the equation.

Enter the coefficients in the following format:

a, b, c, d

where a is the first coefficient, b is the second, c is the third, and d is the fourth.

Question 3
3.

Following along with your teacher, click on the 'show your work' box below and balance the equation.

Enter the coefficients in the following format:

a, b, c, d

where a is the first coefficient, b is the second, c is the third, and d is the fourth.

Question 4
4.

Following along with your teacher, click on the 'show your work' box below and balance the equation.

Enter the coefficients in the following format:

a, b, c, d

where a is the first coefficient, b is the second, c is the third, and d is the fourth.

Part 3: Independent Practice

DIRECTIONS: For questions 20 - 27, determine the number of atoms in each of the formulas. See the example below:


Answer: 4, 2
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Now that you've been introduced to balancing equations, it's time to do some practice. The key thing to remember about balancing chemical equations is that it is a trial and error process. Don't be afraid to try something, erase it, try something else, erase that, try another thing - you get the picture.

A few reminders and hints as you work through these...
  • You may only change the coefficients - never change the subscripts!
  • If polyatomic ions are on both sides of the equation, treat them as a unit and balance them first.
  • Balance the metals, then the nonmetals.
  • If the equation has O2 or H2, balance those last.
  • For combustion reactions, balance carbon first, hydrogen second, and oxygen last (C-H-O)
  • Make sure that the coefficients are in the most reduced ratio.
DIRECTIONS: Answer at least four questions between 28 - 34.
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DIRECTIONS: Answer at least six questions between 35 - 42. You may use the 'show your work' box if you like.

Type the coefficients in order with commas and spaces between, like this:

a, b, c, d
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DIRECTIONS: Answer at least five questions between 43 - 50. You may use the 'show your work' box if you like.

Type the coefficients in order with commas and spaces between, like this:

a, b, c, d
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Question 5
5.

Na:___ O:___ H:___

Question 6
6.

H:___ S:____

Question 7
7.

Zn:___ Cl:___

Question 8
8.

Al:___ S:___

Question 9
9.

C:___ H:___ O:___

Question 10
10.

Ba:___ C:___ H:___ O:___

Question 11
11.

Sn:___ Cr:___ O:___

Question 12
12.

N:___ O:___ H:___

Question 13
13.

What are the coefficients?

Question 14
14.

What are the coefficients?

Question 15
15.

What are the coefficients?

Question 16
16.

What are the coefficients?

Question 17
17.

What are the coefficients?

Question 18
18.

What are the coefficients?

Question 19
19.

What are the coefficients?

Question 20
20.

What are the coefficients?

Question 21
21.

What are the coefficients?

Question 22
22.

What are the coefficients?

Question 23
23.

What are the coefficients?

Question 24
24.

What are the coefficients?

Question 25
25.

What are the coefficients?

Question 26
26.

What are the coefficients?

Question 27
27.

What are the coefficients?

Question 28
28.

What are the coefficients?

Question 29
29.

What are the coefficients?

Question 30
30.

What are the coefficients?

Question 31
31.

What are the coefficients?

Question 32
32.

What are the coefficients?

Question 33
33.

What are the coefficients?

Question 34
34.

What are the coefficients?

Question 35
35.

What are the coefficients?