In today's class, we discussed how to balance equations involving carbon, hydrogen, and oxygen. We learned that in combustion reactions, the products will always be carbon dioxide and water.
ex. (in-class) CH4 + 02 -> CO2 + H2O
becomes CH4 + 202 -> CO2 + 2H2O
Also, we found out that we could use fractions while balancing equations. Because the number in front of the atom or compound says how many moles of it there is, it is possible to have a fraction as there can be 1/2 or 7/2 of a mole.
ex. (in-class) C8H18 + O2 -> CO2 + 9H2O
becomes C8H18 + 25/2 O2 -> 8 CO2 + 9H2O
Briefly, we discussed alcohols.
CH3OH - methanol
C2H5O5 - ethanol
In addition, we were given a number of acids we should know.
Hydrochloric acid (HCl)
Nitric acid (HNO3)
Sulfuric acid (H2SO4)
Phosphoric Acid (H3PO4)
Acetic Acid (CH3COOH)
Try some for yourself!
1. CO2 + H2 -> CH4 + H2O
2. C2H6 + O2 -> CO2 + H2O
Answers:
1. CO2 + 4H2 -> CH4 + 2H2O
2. 2C2H6 + 7O2 -> 4CO2 + 6H2O
Need to some more help or examples? Check out the videos below:
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