ok...Here goes nothing....
since the equation is: stilbene dibromo(SD) + 2KOH :rarrow:diphenylacetylene (DPA) + 2H2
O + 2KBr
The limiting reagent is stilbene dibromo since it gives the least amount of moles of product.
The grams of limiting reactants is 1.500g
moles of limiting reactants is 1.500g x (1 mol/340.07g)= 4.411x10-3
Theoretical yield in grams calculation: 1.500g stilbene dibromo (SD) x (1 mole/ 340.07g) x (1 mole DPA/ 1 mole SD) x (178.22g/ 1 mole DPA) = 0.786 g as the theoretical yield.
Actual yield: 0.32g
% yield: 0.32g /0.786g = 40%
Not too sure why i put 52% on the last post. Probably because I was doing it in my head. is this correct? it's still a pretty low yield...