CH110 Lecture Notes - Lecture 5: Limiting Reagent, Nitric Acid, Stoichiometry
Document Summary
Yields of chemical reacions and the limiing reactant. Theoreical yield: the maximum quanity of a product that can be obtained from a chemical reacion. Actual yield: the quanity of a product that is actually obtained from a chemical reacion in the laboratory, actual yield is usually smaller than theoreical yield due to side reacions taking place or equilibrium. Limiing reactant: determines of limits the amount of product formed. 101. 0g of both our answer nkcl= mol kcl nhno3= 101. 0g/63. 018g/mol-1 = 1. 6027 mol hno3 the limiing reagent when reactants are mixed. 1. 602mol hno3(3mol kcl/ 4mol hno3) = 1. 202 mol kcl consumed. Mass kcl remaining= (0. 152mol)(74. 55g/mol)= 11. 4: calculate the maximum mass of kno3 that can be formed nkno3= (1. 602 mol hno3)(3mol kno3/4mol hno3) = 1. 202 mol kno3. Mass kno3 = (1. 202 mol kno3)(101. 11g/mol)= 121. 5 g kno3. Actual yield= (2. 04 mol mn)(0. 750)(54. 94g mn/1mol) =84. 1g actual yield mn.
