Chemical Reactions - As we learned earlier the most...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
As we learned earlier the most fundamental building blocks of matter for chemists are atoms (that is, the  elements you see in the periodic table). We also learned that atoms can combine with other atoms by chemical  bonding to form molecules. Recall that the process where a molecule is transformed into a different molecule is  called a  chemical change . This process of chemical change is represented by a  chemical reaction . For example, It is important to keep in mind that while in a chemical reaction molecules are destroyed and created by  breaking and forming chemical bonds, atoms are neither created nor destroyed in a chemical reaction. In other  words - there must be the same number of each type of atom on the product and reactant sides of the arrow.  Making sure that this rule is obeyed is called "balancing the chemical equation". In the above example the  equation would be unbalanced without the 2 in front of the O 2  and H 2 O. We can make a table to confirm that  the number of atoms on each side of the arrow are the same: Reactants Products Balanced? 1 C 1 C yes 4 H 4 H yes 4 O 4 O yes Notice that we never change the chemical formula of any product or reactant when trying to balance a chemical  equation. A balanced equation is essential to known the stoichiometry for the chemical reaction. Stoichiometry
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/13/2011 for the course CHEMISTRY 121 taught by Professor Staff during the Fall '10 term at Bangladesh University of Eng and Tech.

Page1 / 4

Chemical Reactions - As we learned earlier the most...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online