Chapter 10, Problem 44E

The flasks below illustrated three trials of a reaction between varying amounts of zinc and a constant volume of hydrochloric acid solution of constant concentration. The table gives the initial amount of zinc added and the observation at the conclusion of each reaction.

Mass of Zinc Added ( $\text{g}$)	Observation at Conclusion of Reaction
$6.10$	Balloon inflated completely Some unreacted zinc remains
$2.37$	Balloon inflated completely No zinc remains
$0.41$	Balloon not inflated completely No zinc remains

The reaction produces an aqueous solution of zinc chloride and hydrogen gas. Explain the observed results.