Constructed Response 5. Zinc metal (Zn) reacts with hydrochloric acid
(HCl) to produce hydrogen gas (H2) and zinc
chloride (ZnCl2). A scientist has powdered zinc
and a chunk of zinc of equal mass. Available in
the lab are dilute HCl and concentrated HCl.
Which combination of zinc and acid would
react most quickly? Explain why the
combination you chose would make the
reaction occur most quickly.