Presentation on theme: "Limiting Reactant A.K.A. Stoichiometry. One reactant remains while the other is consumed in a reaction Mole ratio will help determine the limiting."— Presentation transcript:
Limiting Reactant A.K.A. Stoichiometry
One reactant remains while the other is consumed in a reaction Mole ratio will help determine the limiting reaction Need to create a conversion pathway How do we determine which reactant limits the product?
Which reactant remains when 6.70 mole Na reacts with 3.2o moles of Cl 2 2 Na + Cl 2 2 NaCl Which reactant is the limiting reactant? Step 1 Moles of reactant Moles of product
Moles of NaMole RatioMoles of NaCl 6.70 moles of Na2 mol NaCl= 6.70 mol NaCl 2 mol Na 2 Na + Cl 2 2 NaCl Moles of Cl 2 Mole RatioMoles of Product 3.20 moles of Cl 2 2 mol NaCl= 6.40 mol NaCl 1 mol Cl 2 Step 1 Cl 2 is the Limiting Reactant!
Which reactant is the limiting reactant when 3.5 g Cu reacts with 6.0 g AgNO 3? Cu + AgNO 3 Cu(NO 3 ) 2 + Ag; balanced? Cu + 2 AgNO 3 Cu(NO 3 ) Ag Limiting Reactant and Mass-Mass Conversions
We have 3.5 g Cu and 6.0 g AgNO 3 Create a Conversion Pathway Cu + 2 AgNO 3 Cu(NO 3 ) Ag Step 1 Mass of Reactant Moles of Reactant Step 2 Moles of Product Step 3 Mass of Product
Mass of CuMolar Mass of Cu Mole RatioMolar Mass of Ag Mass of Ag 3.5 g Cu1 mol Cu2 mol Ag108 g Ag= 12 g Ag 63.5 g Cu1 mol Cu1 mol Ag Cu + 2 AgNO 3 Cu(NO 3 ) Ag Mass of AgNO 3 Molar Mass of AgNO 3 Mole RatioMolar Mass of Ag Mass of Ag 6.0 g AgNO 3 1 mol AgNO 3 2 mol Ag108 g Ag= 3.8 g Ag g AgNO 3 2 mol AgNO 3 1 mol Ag Silver nitrate is the limiting reactant!
Limiting Reactant Applet With a partner, follow directions on worksheet and answer problems Your Turn…