Balancing Chemical Equations
For this assessment, you will first watch a short video that will
explain the need to balance chemical equations and demonstrate
how to balance chemical equations. Next, you will be given several
websites to visit if you need additional practice with the process of
balancing chemical equations. Finally, you will balance equations on
your own to receive credit for this assessment. Follow the directions
below and balance the given chemical equations. Be sure to type your coefficients directly in the text
boxes in this document to receive credit for this assessment.
Tutorial Video
http://video.lincolninteractive.com/Video/Play/courses/nn.sci.200812.1.ho/Unit2/lesson5/Science_8
_Part_1_U2L5_Balancing_Chemical_Equations.mp4
First, you will examine a tutorial on how to balance chemical equations. Click the above link and
follow along with the tutorial video from Khan Academy. This video explains and demonstrates how
to balance chemical equations.
Additional Help
The following websites can offer you additional help if you are unsure about how to balance chemical
equations. You can visit any of these websites at any time to review the steps to follow in balancing
chemical equations. While you don’t need to visit these sites, and the practice equations you balance
there will not be graded, you may use them as a review for the graded sections below.
http://misterguch.brinkster.net/eqnbalance.html
The above site has four sections explaining why and how to balance chemical equations, followed by
five practice problems.
http://users.wfu.edu/ylwong/balanceeq/balanceq.html
The above website has a “Balancing Equations Tutorial,” as well as a section for you to check your
final answers to problems 1 through 4 below. However, you do not need to visit this website to
balance equations 1 through 4.
Practice Problems
Balance the following equations. Once you have the correct answer, type the coefficients in the text
boxes below. If you would not add a coefficient in a box, simply type a 1 to avoid confusion. (4 points)
1. Methane:
CH4 +
O2 →
CO2 +
H2O
2. Ethane:
C2H6 +
O2 →
CO2 +
H2O
3. Propane:
C3H8 +
O2 →
CO2 +
H2O
4. Ethanol:
C2H5OH +
O2 →
CO2 +
H2O
More Practice Problems
https://web.archive.org/web/20130530033007/http://www.files.chem.vt.edu/RVGS/ACT/notes/scripts/bal_eq1.ht
ml
The above website will allow you to check your answers once you have balanced the five chemical
equations. However, you do not need to use the website to complete this section. Balance the five
chemical equations below. When you are finished, type your final coefficients directly in the boxes
provided. If you would not add a coefficient in a box, simply type a 1 to avoid confusion. (5 points)
1.
H2 +
O2 →
H2O
2.
Fe +
Cl2 →
FeCl3
3.
Cu +
AgNO3 →
4.
Zn +
5.
Pb(NO3)2 +
HCl →
Cu(NO3)2 +
ZnCl2 +
AlCl3 →
PbCl2 +
Ag
H2
Al(NO3)3
Balance These Chemical Equations
Balance the following equations using the steps you have learned. Type your final coefficients directly
in the text boxes below. If you would not add a coefficient in a text box, simply type a 1 to avoid
confusion. (16 points)
1.
H2 +
O2 →
H2O
2.
H2 +
N2 →
NH3
3.
Al2O3 →
Al +
O2
4.
KClO3 →
KCl +
O2
5.
S8 +
6.
C2H6 +
7.
P4 +
O2 →
P2O5
8.
Ag +
S8 →
Ag2S
9.
Al +
Br2 →
AlBr3
10.
Cr +
O2 →
Cr2O3
11.
NaClO3 →
12.
AlBr3 +
13.
Na +
14.
AgNO3 +
15.
16.
O2 →
O2 →
NaCl +
SO2
CO2 +
H2O
O2
Cl2 →
AlCl3 +
Br2
H2O →
NaOH +
H2
K3PO4 →
Ag3PO4 +
C3H8 +
O2 →
CO2 +
C2H2 +
O2 →
CO2 +
KNO3
H2O
H2O
When you have finished this assessment, review it to be sure that you have filled in all of the boxes
with coefficients, either a 1 or a higher number, to balance all the equations listed.
Directions for Submitting Your Applied Knowledge Assessment:
For this Applied Knowledge Assessment, you will submit ONE document for credit. When you have
completed the assessment, save this document with your name included in the file extension. An
example is provided for you below.
Example: Science8_aka_directions_JohnSmith
After you have saved your document, submit it to be graded for your Applied Knowledge Assessment.