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Unit 7 Stoichiometry equations

Unit 7 Stoichiometry equations - STOICHIOMETRY EQUATIONS...

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Unformatted text preview: STOICHIOMETRY - EQUATIONS STOICHIOMETRY Stoichiometry: the study of quantitative Stoichiometry: relationships that exist in chemical formulas and reactions. formulas In this unit you will interpret and perform In stoichiometric calculations in balanced chemical equations. chemical The Process The 1. 2. 3. 4. • Balance the equation. Identify the known and unknown. Convert the known units to moles (if required). Multiply by the coefficient (mole) ratio. Moles of unknown / moles of known 5. 6. Convert the moles of unknown to the desired Convert units. units. Sigfigs / scientific notation / units / substance Sample Problems Sample Moles to Moles Volume to Volume Mass to Mass Mass to Volume Limiting Reactants Limiting The reactant that limits the amount of product The formed in a chemical reaction is called the limiting reactant. limiting The quantities of products formed in a reaction are The always determined by the quantity of the limiting reactant. reactant. Examples! Wkst 11-3 Percent Yield Percent The amount of a product that should be produced based on The calculations is called the expected yield. expected The amount of a product that is really obtained from a The chemical reaction is called the actual yield. actual Percent Yield = Percent actual yield X 100% actual expected yield ...
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