CHM 1025C Module Five Sample Test
Module Five-Part K Excess-Limiting Reagent Problem 10 points
How many grams of Calcium phosphate can be made according to the reaction (unbalanced):
CaCl2 + K3PO4 ----> Ca3(PO4)2 + KCl
by mixing a solution of 5.00 grams of CaCl2 with another containing 8.00 grams of Potassium phosphate?
Module Four-Part L Impure Reagents/% Yield Stoichiometry Problem 5 points
A laboratory manual calls for 13.0 grams of butanol reactant in excess sodium bromideand sulfuric acid as reactants in this reaction:
C4H9OH + NaBr + H2SO4 ------> C4H9Br + NaHSO4 + H2O
A student following these directions obtains 16.8 grams of butyl bromide (C4H9Br). What is the theoretical yield and the percent yield of this reaction?