Answer to Question #175758 in General Chemistry for Andrea

Question

125 grams of hydrochloric acid react with 150 grams of zinc. What is the limiting reactant? 2HCl+Zn ZnCl 2 +H 2

Answer 1

Molar Mass of HCl = 36g/mol

Molar Mass of Zn = 65g/mol

= 125g/36 = 3.47 moles of HCl

150/65 = 2.31 moles Zn

Mole ratio = 1Zn = 2Hcl

= 2.31 moles Zn × 2.0 = 2.62 moles of HCl

Because we have 3.47 moles of HCl compared to 2.62 moles needed to fully react zinc, therefore Zn is the limiting reactant.