Chapter 14, Problem 14.121QP

Ammonium hydrogen sulfide. NH₄HS, is unstable at room temperature and decomposes:

${\text{NH}}_4\text{HS}(s)\stackrel{}{\rightleftharpoons }{\text{NH}}_3(g)+{\text{H}}_2\text{S}(g)$

You have placed some solid ammonium hydrogen sulfide in a closed flask. Which of the following would produce less hydrogen sulfide, H₂S, which is a poisonous gas?

1. a Removing some NH₃ from the flask
2. b Adding some NH₃ to the flask
3. c Removing some of the NH₄HS
4. d Increasing the pressure in the flask by adding helium gas