Learn how to solve problems like this one with our expert tutor.

Problem: Small quantities of hydrogen gas can be prepared in the laboratory by the addition of aqueous hydrochloric acid to metallic zinc.Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)Typically, the hydrogen gas is bubbled through water for collection and becomes saturated with water vapor. Suppose 240. mL of hydrogen gas is collected at 30.°C and has a total pressure of 1.032 atm by this process. What is the partial pressure of hydrogen gas in the sample? How many grams of zinc must have reacted to produce this quantity of hydrogen? (The vapor pressure of water is 32 torr at 30°C.)

FREE Expert Solution
FREE Expert Solution

Ptotal=PH2+PH2O

1.032 atm=PH2+32 torr(1 atm760 torr)1.032 atm=PH2+0.0421 atm

View Complete Written Solution
Problem Details

Small quantities of hydrogen gas can be prepared in the laboratory by the addition of aqueous hydrochloric acid to metallic zinc.

Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)

Typically, the hydrogen gas is bubbled through water for collection and becomes saturated with water vapor. Suppose 240. mL of hydrogen gas is collected at 30.°C and has a total pressure of 1.032 atm by this process. What is the partial pressure of hydrogen gas in the sample? How many grams of zinc must have reacted to produce this quantity of hydrogen? (The vapor pressure of water is 32 torr at 30°C.)

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 Gas Stoichiometry concept. If you need more Gas Stoichiometry practice, you can also practice Gas Stoichiometry practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofSmall quantities of hydrogen gas can be prepared in the labo...as medium difficulty.

How long does this problem take to solve?

Our expert Chemistry tutor, Sabrina took 8 minutes and 20 seconds to solve this problem. You can follow their steps in the video explanation above.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl 2nd Edition practice problems.