Today in class we had a lecture over Ch 7, which includes chemical reactions, their characteristics and balancing equations. I found this lesson relatively straightforward, with just a few new pieces of information. For example, the difference between a change in subscripts and coefficients was finally made clear to me. A change in coefficient changes the amount of molecules, while a change in subscript completely changes the composition and identity of an element. It is extremely important to not confuse the two and to understand when both changes are appropriate. Additionally, I learned the importance of combustion and how to balance an equation using the CHO method. Combustion always reacts with oxygen and always produces carbon dioxide and water. Also, to balance its equation, it is easiest to start with carbon, then work on the hydrogen and finally end with the oxygen.
Sunday, December 6, 2015
Ch 7 Notes
Today in class we had a lecture over Ch 7, which includes chemical reactions, their characteristics and balancing equations. I found this lesson relatively straightforward, with just a few new pieces of information. For example, the difference between a change in subscripts and coefficients was finally made clear to me. A change in coefficient changes the amount of molecules, while a change in subscript completely changes the composition and identity of an element. It is extremely important to not confuse the two and to understand when both changes are appropriate. Additionally, I learned the importance of combustion and how to balance an equation using the CHO method. Combustion always reacts with oxygen and always produces carbon dioxide and water. Also, to balance its equation, it is easiest to start with carbon, then work on the hydrogen and finally end with the oxygen.
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