Hydrochloric acid can be prepared using the reaction described by the chemical equation: 2 NaCl(s) + H2SO4(l) ----> 2 HCl(g) + Na2 SO4(s). How many grams of HCl can be prepared from 393 g of H2SO4 and 4.00 moles of NaCl?

Answer 1

This is a limiting reagent problem.
Convert 393 grams H2SO4 to moles H2SO4.
a. Using the coefficients in the balanced equation, convert moles H2SO4 to moles HCl.
b. Using the coefficients in the balanced equation, convert 4.00 moles NaCl to moles HCl.
c. Both numbers can't be right. The correct one to choose is ALWAYS the smaller one.

Convert the smaller number of moles HCl to grams. g = moles x molar mass.