2Limiting ReactantThis is the chemical that is used completely in a reaction.Also called limiting reagent.[http://www.mhhe.com/physsci/chemistry/chang7/esp/folder_structure/cr/m2/s3/assets/images/crm2s3_1.jpg]
3Limiting Reactant Al2O3 + NaCl AlCl3 + Na2O If you have 18.0 moles of NaCl and 2.50 moles of Al2O3, which is the limiting reactant?Hint: Solve reaction twice for same product. (AlCl3 for this demo…)623
4The reactant that creates the smaller amount is limiting! Al2O3 + 6 NaCl 2 AlCl3 + 3 Na2O18.0 mol NaCl2 mol AlCl3= 6.00 mol AlCl36 mol NaClThe reactant that creates the smaller amount is limiting!2.50 mol Al2O32 mol AlCl3= 5.00 mol AlCl31 mol Al2O3
5Limiting Reactant Na + CaCl2 NaCl + Ca 2 2 If you start with 57.5 g of Na and 111 g of CaCl2, how many grams of Ca will you have at the end of the reaction?Hint: solve the question twice…
62 Na + CaCl2 2 NaCl + Ca57.5 g Na1 mol Na1 mol Ca40.1 g Ca23.0 g Na2 mol Na1 mol Ca=50.1 g Ca1 mol CaCl21 mol Ca111 g CaCl240.1 g Ca1 mol CaCl2111.1 g CaCl21 mol Ca=40.1 g Ca
7Limiting Reactant 40.1 g of Ca is produced from the 111 g of CaCl2 The CaCl2 is the limiting reactant.