Chemistry 122 d

Question

Consider the following balanced chemical equation: Zn + 2 HCI --> ZnCl2 + H2 +

What number of moles of zinc are required to react with 0.865 moles of hydrochloric acid () (Calculate all answers to 3 decimal places)

Answer 1

Hello, Chloe,

The balanced equation tells us that 1 mole of zinc is needed for every 2 moles of HCl. That's a molar ratio of 2 to 1. We could write this as:

(2 moles Zn)/(1 mole HCl)

Given that we have 0.865 moles of HCl, we can calculate moles Zn required:

(0.865 moles HCl)*((2 moles Zn)/(1 mole HCl) = 0.433 moles Zn

Bob