Today we started balancing chemical equations. This can be very challenging and is very much like math. Tomorrow we will continue to work on this concept and there will be a homework assignment for reinforcement. If students need additional practice, here are some websites that offer some help:
http://www.files.chem.vt.edu/RVGS/ACT/notes/Types_of_Equations.html#Top
http://www.files.chem.vt.edu/RVGS/ACT/notes/scripts/bal_eq1.html (this program requires you to put a number in for all response areas. Instead of leaving a space blank if it has one molecule, put in the 1 !!
http://sciencespot.net/Pages/classchem.html#Anchor8 (go to "balancing act" section about half way down.
for those who are ready for the next step, you can go to this link:
http://www.glencoe.com/sites/common_assets/science/virtual_labs/PS16/PS16.html
- this site also asks you to calculate the molecular weight of the reactants and products to check for a balance of your equation.
- Just click on the "elements on" button to see each element from the periodic table. Use the atomic mass multiplied by each atom in your equation.
- Example: for water, H2O, each hydrogen has an atomic mass unit (amu) of 1 and the oxygen is 16 amus. Therefore, 2 (one for each hydrogen) + 16 = 18 amus for each molecule of H2O.
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