A 0.100 g piece of magnesium metal reacts completely with 20.0 mL of 1.00 M HCl in a…
CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance
Problem
A 0.100 g piece of magnesium metal reacts completely with 20.0 mL of 1.00 M HCl in a 2.00 L flask at 300 K, producing H2(g) according to
Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g)
The hydrogen gas is collected over water; the vapor pressure of water at 300 K is 24.0 mmHg. What is the total pressure in the flask after the reaction is complete?
(a) 0.051atm
(b) 0.133atm
(c) 0.082atm
(d) 0.155atm