Hydrogen gas is generated by the reaction Zn(s) + 2 HCl(aq) → ZnCl₂(aq) + H₂(g)
CHEMISTRY · Subjective · A Level · Chemistry · Amount of substance · Amount of substance
Problem
Hydrogen gas is generated by the reaction Zn(s) + 2 HCl(aq) → ZnCl₂(aq) + H₂(g). A sample of the gas is collected over water at 25 °C. The volume of the collected gas is 750 mL, and the total pressure in the collection vessel is 753 torr. (The vapor pressure of water at 25 °C is 24 torr.) Determine the mass of Zn that reacted to produce the collected H₂(g).