posted by jo on .
how do you tell which reactant is limiting reactant with the following information:
mass of cup 55.78g
mass o/sodium bicarbonate 1.01g
mass o/citric acid 1.52g
toal mass 58.31g
mass of cup,solute after reaction 59.95g
mass o/carbon dioxide .42g
H3C6H5O7(aq) + 3 NaHCO3(aq) ¨ Na3C6H5O7(aq) + 3 H2O(l) + 3 CO2(g)
Convert g citric acid to mols. mols = grams/molar mass. Then convert, using the coefficients in the balanced equation, mols citric acid to moles of the product.
Do the same for NaHCO3. Which ones produces the FEWER mols of the product. That is the limiting reagent.