68Limit-Reg

68Limit-Reg - LIMITED REAGENT GCHEM I LAB CONCEPT PROBLEMS...

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LIMITED REAGENT GCHEM I LAB CONCEPT PROBLEMS The LIMITING REAGENT of a chemical reaction is the reagent that: 1) yields the least amount of product and 2) is completely consumed during the reaction. MOLE APPROACH: 2 Al(s) + 6 HCl (aq) 2 AlCl 3 (aq) + 3 H 2 (g) Theoretical: 2 moles Al to 6 moles HCl = 2 moles A l : 6 moles HCl = 1 Al : 3 HCl 2 2 Actual Data: 3 moles Al to 10 moles HCl = 3 moles A l : 10 moles HCl = 1 Al : 3.3 HCl 3 3 therefore Al limiting reagent and HCl excess reagent Actual Data : 4 moles Al to 8 moles HCl = 4 moles A l : 8 moles HC l = 1 Al : 2 HCl 4 4 therefore HCl limiting reagen t and Al excess reagent GRAMS APPROACH: STEP 1A: Determine amount of Reactant #1 needed to completely react all of Reactant #2 STEP 1B: Determine amount of Reactant #2 needed to completely react all of Reactant #1 STEP 2: Identify Limiting Reagent and Excess Reagent STEP 3: Determine amount of Excess Reagent STEP 4: Calculate the Products yields – Using the Limiting Reagent A company manufactures AlCl
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68Limit-Reg - LIMITED REAGENT GCHEM I LAB CONCEPT PROBLEMS...

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