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Stoichiometry Problems

# Stoichiometry Problems - Stoichiometry Problems This is the...

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Stoichiometry Problems This is the determination of quantitites of a component in a chemical reaction when given the quantity of another component. one must have a balanced equation before one starts. So first step is always to write the balancedequation There are several types of stoichiometry problems: 1. mole to mole ii. mole to mass (or mass to mole) iii. mass to mass (most useful) iv. mole to volume (or volume to mole)( This is not discussed in the class) v. mass to volume (or volume to mass) (This not also discussed in the class) 4 & 5 are based on the principle that one mole of any gas occupies 22.4 litres at STP volume to volume Mole to Mole Stoichiometry Problem mole to mole means given the moles of one component in a chemical reaction determine the moles of another component in the same reaction. Moles of reactant should be equal to the moles of products ( I highlighted this point in the class. ( This is derived from the law that matter can neither be created nor destroyed) For example: Given the Haber Process: N 2 + 3 H 2 ---> 2 NH 3 How many moles of NH 3 could be produced if 4 moles of N 2 were reacted with enough Hydrogen. See if the chemical equation is balanced 1. Determine the mole relationship between the given component (N 2 ) and the requested component (NH 3 ) According to the balanced equation: 1 mole N 2 = 2 moles of NH 3 produced ( See how the balanced equation is important here) Convert given moles of N 2 to moles of requested NH 3

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Stoichiometry Problems - Stoichiometry Problems This is the...

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