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:
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?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Standard Temperature and Pressure concept. You can view video lessons to learn Standard Temperature and Pressure. Or if you need more Standard Temperature and Pressure practice, you can also practice Standard Temperature and Pressure practice problems.
What is the difficulty of this problem?
Our tutors rated the difficulty ofWhen aluminum is placed in concentrated hydrochloric acid, h...as medium difficulty.
How long does this problem take to solve?
Our expert Chemistry tutor, Dasha took 4 minutes and 43 seconds to solve this problem. You can follow their steps in the video explanation above.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Geiger's class at UCB.