Lab3_EmpiricalFormula

Lab3_EmpiricalFormula - Emperical Formula C125 Prelab C125...

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Unformatted text preview: Emperical Formula C125 Prelab C125 Exp er im en tal Che m i st ry 1 Experimental Purpose Investigate what is meant by: Molar ratio of elements in a compound Empirical formula of a compound Determine : Empirical formula of lead iodate Important Terms for This Experiment Empirical formula Molecular formula Limiting reactant (reagent) Definition of Empirical Formula A chemical formula that indicates the relative proportions of the elements in a molecule rather than the actual number of atoms of the elements Simplest, whole number ratio of atoms in a chemical compound Definition of Molecular Formula A chemical formula that shows the number and kinds of atoms in a molecule Some multiple of ratio of atoms that tells the actual number of atoms/molecule A multiple of the empirical formula Mol. Formula = n x Emp. Formula Definition of Limiting Reagent The reagent that will be completely used, thereby stopping the reaction, even if the other reagent (or several other reagents, if there are more than two) is still present. The substance that controls the amount of product which forms Lead is the limiting reagent in this experiment, so it determines amount of lead iodate formed Example Calculation Problem Statement: A sample of a compound of nitrogen and oxygen contains 1.52g of N and 3.47g of O. The formula weight of this compound is known to be between 90g and 95g. Determine the empirical formula, molecular formula, and formula weight of the compound. Example Calculation...
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This note was uploaded on 11/02/2009 for the course CHEM C125 taught by Professor Staff during the Fall '08 term at IUPUI.

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Lab3_EmpiricalFormula - Emperical Formula C125 Prelab C125...

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