Wednesday 18 January 2012

Mole to Mole Conversions

In today's class we learned how to do from mole to mole conversions. We used the coefficients in front of balance equations. The coefficients tell us the number of moles reacted or produced. These formulas can also be used as conversion factors.

e.g. CH4 + 2O2 > CO2 + 2H2O
0.15 mol x 1/1 = 0.15 mol (what you need over what you have)
* leave in the correct ratio even it is 4/4

e.g. 2.1 x 10^-2 of Aluminum Hydroxide + Sulphuric Acid
2Al(OH)3 + 3 H2SO4 > AL2 (SO4)3 +6H2O

2.1 x 10^-2 x 1/2 = 0.011 mol
= 1.1 x 10^-2 mol

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