🤓 Based on our data, we think this question is relevant for Professor Geiger's class at UCB.
When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced.
2Al (s) + 6HCl (aq) → 2AlCl3 (aq) + 3H2 (g)
What volume in L of H2 (g) is produced when 7.40 g of Al (s) reacts at STP?
We will calculate the amount of hydrogen gas (H2(g)) produced by Al(s) using the balanced reaction equation.
Balanced reaction equation: 2 Al(s) + 6 HCl(aq) → 2 AlCl3(aq) + 3 H2(g)
Since we need to find the volume of H2(g) produced and the temperature and pressure (STP) are given, we’re going to use the ideal gas equation:
STP means Standard Temperature and Pressure where: